Filed Pursuant to Rule 424(b)(3)
Registration No. 333-274499

MERGER AND SHARE ISSUANCE PROPOSALS—YOUR VOTE IS VERY IMPORTANT

Dear Stockholders:

On July 31, 2023, Revolution Medicines, Inc., which is referred to as Revolution Medicines, EQRx, Inc., which is referred to as EQRx, Equinox Merger Sub, Inc., a direct, wholly owned subsidiary of Revolution Medicines, which is referred to as Merger Sub I, and Equinox Merger Sub II LLC, a direct, wholly owned subsidiary of Revolution Medicines, which is referred to as Merger Sub II, entered into an Agreement and Plan of Merger, as it may be amended from time to time, which is referred to as the merger agreement, for the acquisition of EQRx by Revolution Medicines. Pursuant to the terms of the merger agreement, Merger Sub I will merge with and into EQRx, which transaction is referred to as the first merger, with EQRx surviving the first merger as a direct, wholly owned subsidiary of Revolution Medicines, and as soon as practicable after the first merger and as the second step in a single integrated transaction with the first merger, EQRx will merge with and into Merger Sub II, which transaction is referred to as the second merger, with Merger Sub II surviving as a direct, wholly owned subsidiary of Revolution Medicines. The first merger and the second merger together are referred to as the mergers.

Upon successful completion of the first merger, referred to as the effective time, each issued and outstanding share of EQRx common stock as of immediately prior to the completion of the first merger (other than the shares that are held by EQRx in treasury or shares owned by EQRx, Revolution Medicines, Merger Sub I or Merger Sub II or any wholly owned subsidiary thereof) will be converted into the right to receive a number of validly issued, fully paid and non-assessable shares of Revolution Medicines common stock equal to an exchange ratio determined by dividing (i) the aggregate number of shares of Revolution Medicines common stock to be issued as merger consideration (as described below) by (ii) the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement, and cash in lieu of any fractional shares of Revolution Medicines common stock any former holder of EQRx common stock would otherwise be entitled to receive. The exchange ratio numerator (i.e., the aggregate number of shares of Revolution Medicines common stock to be issued as merger consideration) will equal the sum (rounded to the nearest whole share) of (i) 7,692,308 shares of Revolution Medicines common stock plus (ii) an additional number of shares of Revolution Medicines common stock, which will be determined prior to the special meeting of EQRx stockholders, referred to as the EQRx special meeting, by dividing (a) $870,000,000 by (b) (1) the daily volume weighted average closing price of one share of Revolution Medicines common stock, for each of the five consecutive trading days ending on and including the date that is the sixth business day prior to the EQRx special meeting date, which is referred to as the pre-EQRx special meeting VWAP, multiplied by (2) 0.94. Upon completion of the mergers, Revolution Medicines stockholders will continue to own their existing Revolution Medicines shares. Revolution Medicines common stock is traded on the Nasdaq Global Select Market under the symbol “RVMD” and EQRx common stock is traded on the Nasdaq Global Market under the symbol “EQRX.”

For illustrative purposes only, we have provided the below assumptions and sensitivity analysis to inform your decision. Assuming (1) a pre-EQRx special meeting VWAP of $32.1132, which reflects the five-day volume weighted average closing price per share of Revolution Medicines common stock calculated for the five trading days ending on and including September 15, 2023, and (2) the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement as of September 15, 2023, is 497,460,533, the exchange ratio would equal 0.0734.

Assuming (1) a pre-EQRx special meeting VWAP of $37.1132, which reflects a $5.00 increase in the five-day volume weighted average closing price per share of Revolution Medicines common stock calculated five trading days ending on and including September 15, 2023, and (2) the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement as of September 15, 2023, is 497,618,584, the exchange ratio would equal 0.0656. Assuming (1) a pre-EQRx special meeting VWAP of $27.1132, which reflects a $5.00 decrease in the five-day volume weighted average closing price per share of Revolution Medicines common stock calculated five trading days ending on and including September 15, 2023, and (2) the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement as of September 15, 2023, is 497,268,020, the exchange ratio would equal 0.0841.

Revolution Medicines and EQRx will each hold special meetings of their respective stockholders in connection with the proposed mergers, which are referred to as the Revolution Medicines special meeting and the EQRx special meeting, respectively.

At the Revolution Medicines special meeting, Revolution Medicines stockholders will be asked to consider and vote on (1) a proposal to approve the issuance of shares of Revolution Medicines common stock to EQRx equityholders pursuant to the merger agreement, which proposal is referred to as the Revolution Medicines share issuance proposal and (2) a proposal to adjourn the Revolution Medicines special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal. The board of directors of Revolution Medicines recommends that Revolution Medicines stockholders vote “FOR” each of the proposals to be considered at the Revolution Medicines special meeting.

At the EQRx special meeting, EQRx stockholders will be asked to consider and vote on (1) a proposal to adopt the merger agreement, which is referred to as the EQRx merger agreement proposal, (2) a proposal to approve, on a non-binding, advisory basis, the compensation that will or may be payable to EQRx’s named executive officers that is based on or otherwise relates to the transactions contemplated by the merger agreement and (3) a proposal to adjourn the EQRx special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the EQRx special meeting to adopt the EQRx merger agreement proposal. The board of directors of EQRx recommends that EQRx stockholders vote “FOR” each of the proposals to be considered at the EQRx special meeting.

The merger agreement requires, as a condition to closing of the mergers and the other transactions contemplated by the merger agreement, that Revolution Medicines stockholders approve the Revolution Medicines share issuance proposal and that EQRx stockholders approve the EQRx merger agreement proposal. Your vote on these matters, as well as other proposals, is very important, regardless of the number of shares you own. Whether or not you plan to attend your respective special meeting electronically, please promptly mark, sign and date the accompanying proxy card and return it in the enclosed postage-paid envelope or authorize the individuals named on your proxy card to vote your shares by calling the toll-free telephone number or by voting online as described in the instructions included with your proxy card.

The accompanying joint proxy statement/prospectus provides you with important information about the special meetings, the mergers, and each of the proposals. We encourage you to read the entire document carefully, in particular the “Risk Factors” section beginning on page 37 of the accompanying joint proxy statement/prospectus for a discussion of risks relevant to the mergers.

We look forward to the successful completion of the mergers.

Sincerely,

Neither the U.S. Securities and Exchange Commission nor any state securities commission has approved or disapproved of the mergers or the Revolution Medicines common stock to be issued in the mergers or determined if the accompanying joint proxy statement/prospectus is accurate or complete. Any representation to the contrary is a criminal offense.

The accompanying joint proxy statement/prospectus is dated as of, and is first being mailed to the stockholders of Revolution Medicines and EQRx on or about, September 29, 2023.

700 Saginaw Drive

Redwood City, California 94063

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS OF REVOLUTION MEDICINES, INC.

TO BE HELD ON NOVEMBER 8, 2023

To the Stockholders of Revolution Medicines, Inc.:

NOTICE IS HEREBY GIVEN that Revolution Medicines, Inc., which is referred to as Revolution Medicines, will hold a completely virtual special meeting of its stockholders, which is referred to as the Revolution Medicines special meeting, at the Revolution Medicines special meeting website, at www.virtualshareholdermeeting.com/RVMD2023SM, on November 8, 2023, beginning at 8:00 a.m., Pacific Time, for the purpose of considering and voting on the following proposals:

(1) to approve the issuance of shares of Revolution Medicines common stock (including securities convertible into or exercisable for shares of Revolution Medicines common stock) to certain equityholders of EQRx, Inc., which is referred to as EQRx, pursuant to the Agreement and Plan of Merger, dated as of July 31, 2023 (as it may be amended from time to time), by and among Revolution Medicines, Equinox Merger Sub I, Inc., a wholly owned subsidiary of Revolution Medicines, Equinox Merger Sub II LLC, a wholly owned subsidiary of Revolution Medicines, and EQRx, which is referred to as the merger agreement, a copy of which is included as Annex A to the accompanying joint proxy statement/prospectus, which proposal is referred to as the Revolution Medicines share issuance proposal; and

(2) to approve the adjournment of the Revolution Medicines special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal, which proposal is referred to as the Revolution Medicines adjournment proposal.

Revolution Medicines will transact no other business at the Revolution Medicines special meeting. The accompanying joint proxy statement/prospectus, including the merger agreement attached thereto as Annex A, contains further information with respect to these matters.

Only holders of record of Revolution Medicines common stock at the close of business on September 26, 2023, the record date for notice of and voting at the Revolution Medicines special meeting, which is referred to as the Revolution Medicines record date, are entitled to notice of and to vote at the Revolution Medicines special meeting.

The board of directors of Revolution Medicines, which is referred to as the Revolution Medicines board of directors, has approved and declared advisable the merger agreement and the transactions contemplated by the merger agreement, including the Revolution Medicines share issuance proposal, on the terms and subject to the conditions set forth in the merger agreement. The Revolution Medicines board of directors recommends that Revolution Medicines stockholders vote “FOR” the Revolution Medicines share issuance proposal and “FOR” the Revolution Medicines adjournment proposal.

Your vote is very important, regardless of the number of shares of Revolution Medicines common stock you own. The merger agreement requires, as a condition to closing of the mergers and the other transactions contemplated by the merger agreement, that Revolution Medicines stockholders approve the Revolution Medicines share issuance proposal. Assuming a quorum is present, the approval of the Revolution Medicines share issuance proposal requires the affirmative vote of the holders of a majority in voting power of the votes cast at the Revolution Medicines special meeting on the Revolution Medicines share issuance proposal.

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A complete list of Revolution Medicines stockholders as of the Revolution Medicines record date will be open to the examination of any Revolution Medicines stockholder at Revolution Medicines’ principal executive offices at 700 Saginaw Drive, Redwood City, California 94063 for a period of 10 days prior to the Revolution Medicines special meeting. This list of stockholders will also be available on the bottom panel of your screen during the meeting after entering the 16-digit control number included on the proxy card that you received, or on the materials provided by your bank or broker.

Whether or not you plan to attend the Revolution Medicines special meeting electronically, Revolution Medicines urges you to please promptly mark, sign and date the accompanying proxy card and return it in the enclosed postage-paid envelope, call the toll-free telephone number or vote online as described in the instructions included with the proxy card, so that your shares may be represented and voted at the Revolution Medicines special meeting. To participate electronically in the Revolution Medicines special meeting, you will need the 16-digit control number included on your proxy card or on the voting instruction form that accompanied your proxy materials. The meeting webcast will begin promptly at 8:00 a.m., Pacific Time. If your shares are held in street name through a bank, broker or other nominee, you will receive instructions on how to vote from the bank or broker. You must follow their instructions in order for your shares to be voted. Internet and telephone voting also may be offered to stockholders owning shares through certain banks and brokers. If your shares are not registered in your own name and you would like to vote your shares at the Revolution Medicines special meeting, you may visit www.virtualshareholdermeeting.com/RVMD2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If you hold your shares in street name and you do not receive a 16-digit control number, you may need to log in to your bank or brokerage firm’s website and select the shareholder communications mailbox to access the meeting and vote. Instructions should also be provided on the voting instruction form provided by your bank or brokerage firm. The use of video, still photography or audio recording at the Revolution Medicines special meeting is not permitted. If you have any questions about the mergers or how to vote or direct a vote in respect of your shares of Revolution Medicines common stock, you may contact our proxy solicitor, Morrow Sodali LLC, at (800) 662-5200 (toll-free in North America) or (203) 658-9400 or by email at RVMD@info.morrowsodali.com.

By Order of the Board of Directors of Revolution Medicines, Inc.

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50 Hampshire Street

Cambridge, Massachusetts 02141

(617) 315-2255

NOTICE OF SPECIAL MEETING OF STOCKHOLDERS OF EQRX, INC.

TO BE HELD ON NOVEMBER 8, 2023

To the Stockholders of EQRx, Inc.:

NOTICE IS HEREBY GIVEN that EQRx, Inc., which is referred to as EQRx, will hold a completely virtual special meeting of its stockholders, which is referred to as the EQRx special meeting, at the EQRx special meeting website, at www.virtualshareholdermeeting.com/EQRX2023SM, on November 8, 2023, beginning at 11:00 a.m., Eastern Time, for the purpose of considering and voting on the following proposals:

(1) to adopt the Agreement and Plan of Merger, dated July 31, 2023 (as it may be amended from time to time), by and among EQRx, Revolution Medicines, Inc., referred to as Revolution Medicines, Equinox Merger Sub I, Inc., a wholly owned subsidiary of Revolution Medicines, and Equinox Merger Sub II LLC, a wholly owned subsidiary of Revolution Medicines, which is referred to as the merger agreement, a copy of which is included as Annex A to the accompanying joint proxy statement/prospectus, which proposal is referred to as the EQRx merger agreement proposal;

(2) to approve, on a non-binding, advisory basis, the compensation that will or may be payable to EQRx’s named executive officers that is based on or otherwise relates to the transactions contemplated by the merger agreement, which proposal is referred to as the EQRx compensation proposal; and

(3) to approve the adjournment of the EQRx special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the EQRx special meeting to approve the EQRx merger agreement proposal, which proposal is referred to as the EQRx adjournment proposal.

EQRx will transact no other business at the EQRx special meeting. The accompanying joint proxy statement/prospectus, including the merger agreement attached thereto as Annex A, contains further information with respect to these matters.

Only holders of record of EQRx common stock at the close of business on September 26, 2023, the record date for notice of and voting at the EQRx special meeting, which is referred to as the EQRx record date, are entitled to notice of and to vote at the EQRx special meeting.

The board of directors of EQRx, which is referred to as the EQRx board of directors, has determined that the transactions contemplated by the merger agreement are advisable and fair to, and in the best interests of, EQRx and its stockholders, and approved and declared advisable the merger agreement and the transactions contemplated by the merger agreement. The EQRx board of directors recommends that EQRx stockholders vote “FOR” the EQRx merger agreement proposal, “FOR” the EQRx compensation proposal and “FOR” the EQRx adjournment proposal.

Your vote is very important, regardless of the number of shares of EQRx common stock you own. The merger agreement requires, as a condition to closing of the mergers and the other transactions contemplated by the merger agreement, that EQRx stockholders approve the EQRx merger agreement proposal. Assuming a quorum is present at the EQRx special meeting, the approval of the EQRx merger agreement proposal requires the affirmative vote of the holders of a majority of the outstanding shares of EQRx common stock entitled to vote at the EQRx special meeting on the EQRx merger agreement proposal.

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A complete list of EQRx stockholders as of the EQRx record date will be open to the examination of any EQRx stockholder at EQRx’s principal executive offices at 50 Hampshire Street, Cambridge, Massachusetts 02141 for a period of 10 days prior to the EQRx special meeting.

Whether or not you plan to attend the EQRx special meeting electronically, EQRx urges you to please promptly mark, sign and date the accompanying proxy card and return it in the enclosed postage-paid envelope, call the toll-free telephone number or use the Internet as described in the instructions included with the proxy card, so that your shares may be represented and voted at the EQRx special meeting. To participate electronically in the EQRx special meeting, you will need the 16-digit control number included on your proxy card or on the instructions that accompanied your proxy materials. The meeting webcast will begin promptly at 11:00 a.m., Eastern Time. If your shares are held in street name through a bank, broker or other nominee, you will receive instructions on how to vote from the bank or broker. You must follow their instructions in order for your shares to be voted. Internet and telephone voting also may be offered to stockholders owning shares through certain banks and brokers. If your shares are not registered in your own name and you would like to vote your shares at the EQRx special meeting, you may visit www.virtualshareholdermeeting.com/EQRX2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If you hold your shares in street name and you do not receive a 16-digit control number, you may need to log in to your bank or brokerage firm’s website and select the shareholder communications mailbox to access the meeting and vote. Instructions should also be provided on the voting instruction form provided by your bank or brokerage firm. The use of video, still photography or audio recording at the EQRx special meeting is not permitted. If you have any questions about the mergers or how to vote or direct a vote in respect of your shares of EQRx common stock, you may contact our proxy solicitor, MacKenzie Partners, Inc., at 1-800-322-2885 toll free in North America, or at 1-212-929-5500 outside of North America or by e-mail at proxy@mackenziepartners.com.

By Order of the Board of Directors of EQRx, Inc.

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REFERENCES TO ADDITIONAL INFORMATION

This joint proxy statement/prospectus incorporates important business and financial information about Revolution Medicines, Inc., which is referred to as Revolution Medicines, and EQRx, Inc., which is referred to as EQRx, from other documents that Revolution Medicines and EQRx have filed with the U.S. Securities and Exchange Commission, which is referred to as the SEC, and that are contained in or incorporated by reference into this joint proxy statement/prospectus. For a listing of documents incorporated by reference into this joint proxy statement/prospectus, please see the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus. This information is available for you free of charge to review through the SEC’s website at www.sec.gov.

Any person may request a copy of this joint proxy statement/prospectus and any of the documents incorporated by reference into this joint proxy statement/prospectus or other information concerning Revolution Medicines or EQRx, without charge, by written or telephonic request directed to the appropriate company or its proxy solicitor at the following contacts:

In order for you to receive timely delivery of the documents in advance of the special meeting of Revolution Medicines stockholders to be held on November 8, 2023, which is referred to as the Revolution Medicines special meeting, or the special meeting of EQRx stockholders to be held on November 8, 2023, which is referred to as the EQRx special meeting, as applicable, you must request the information no later than seven calendar days prior to the applicable special meeting.

The contents of the websites of the SEC, Revolution Medicines, EQRx or any other entity are not being incorporated into this joint proxy statement/prospectus. The information about how you can obtain certain documents that are incorporated by reference into this joint proxy statement/prospectus at these websites is being provided only for your convenience.

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ABOUT THIS JOINT PROXY STATEMENT/PROSPECTUS

This document, which forms part of a registration statement on Form S-4 filed with the SEC by Revolution Medicines, constitutes a prospectus of Revolution Medicines under Section 5 of the Securities Act of 1933, as amended, which is referred to as the Securities Act, with respect to the shares of common stock of Revolution Medicines to be issued to EQRx equityholders pursuant to the Agreement and Plan of Merger, dated as of July 31, 2023 (as it may be amended from time to time), by and among Revolution Medicines, EQRx, Merger Sub I and Merger Sub II, which is referred to as the merger agreement. This document also constitutes a joint proxy statement of Revolution Medicines and EQRx under Section 14(a) of the Securities Exchange Act of 1934, as amended, which is referred to as the Exchange Act. It also constitutes a notice of meeting with respect to the Revolution Medicines special meeting and a notice of meeting with respect to the EQRx special meeting.

Revolution Medicines has supplied all information contained or incorporated by reference into this joint proxy statement/prospectus relating to Revolution Medicines, and EQRx has supplied all such information relating to EQRx. Revolution Medicines and EQRx have both contributed to the information related to the mergers contained in this joint proxy statement/prospectus.

You should rely only on the information contained in or incorporated by reference into this joint proxy statement/prospectus. Revolution Medicines and EQRx have not authorized anyone to provide you with information that is different from that contained in or incorporated by reference into this joint proxy statement/prospectus. This joint proxy statement/prospectus is dated September 29, 2023, and you should not assume that the information contained in this joint proxy statement/prospectus is accurate as of any date other than such date unless otherwise specifically provided herein.

Further, you should not assume that the information incorporated by reference into this joint proxy statement/prospectus is accurate as of any date other than the date of the incorporated document. Neither the mailing of this joint proxy statement/prospectus to Revolution Medicines stockholders or EQRx stockholders nor the issuance by Revolution Medicines of shares of its common stock pursuant to the merger agreement will create any implication to the contrary.

This joint proxy statement/prospectus does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, or the solicitation of a proxy, in any jurisdiction to or from any person to whom it is unlawful to make any such offer or solicitation in such jurisdiction.

Unless otherwise indicated or the context otherwise requires, when used in this joint proxy statement/prospectus:

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TABLE OF CONTENTS

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QUESTIONS AND ANSWERS

The following are some questions that you, as a stockholder of Revolution Medicines or as a stockholder of EQRx, may have regarding the mergers and the other matters being considered at the special meeting of Revolution Medicines’ stockholders, and brief answers to those questions. You are urged to carefully read this joint proxy statement/prospectus and the other documents referred to in this joint proxy statement/prospectus in their entirety because this section may not provide all the information that is important to you regarding these matters. Additional important information is contained in the annexes to, and the documents incorporated by reference into, this joint proxy statement/prospectus. You may obtain the information incorporated by reference in this joint proxy statement/prospectus, without charge, by following the instructions under the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

In order to complete the mergers, among other things:

Revolution Medicines is holding a special meeting of its stockholders to obtain approval of the Revolution Medicines share issuance proposal. Revolution Medicines stockholders will also be asked to approve the proposal to adjourn the Revolution Medicines special meeting to solicit additional proxies if there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal, which proposal is referred to as the Revolution Medicines adjournment proposal.

EQRx is holding a special meeting of its stockholders to obtain approval of the EQRx merger agreement proposal. EQRx stockholders will also be asked to approve (i) on a non-binding, advisory basis, the compensation that will or may be payable to EQRx’s named executive officers that is based on or otherwise relates to the transactions contemplated by the merger agreement, which proposal is referred to as the EQRx compensation proposal and (ii) the proposal to adjourn the EQRx special meeting to solicit additional proxies if there are not sufficient votes at the time of the EQRx special meeting to approve the EQRx merger agreement proposal, which proposal is referred to as the EQRx adjournment proposal.

Your vote is very important, regardless of the number of shares that you own. The approval of the Revolution Medicines share issuance proposal and the approval of the EQRx merger agreement proposal are conditions to the obligations of Revolution Medicines and EQRx to complete the mergers. The approvals of the EQRx compensation proposal, the Revolution Medicines adjournment proposal or the EQRx adjournment proposal are not conditions to the obligations of Revolution Medicines or EQRx to complete the mergers.

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To participate in the Revolution Medicines special meeting, you will need the 16-digit control number included on your proxy card or on the instructions that accompanied your proxy materials. The meeting webcast will begin promptly at 8:00 a.m., Pacific Time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 7:45 a.m., Pacific Time, and you should allow ample time for check-in procedures. If you hold your shares through a bank or broker, instructions should also be provided on the voting instruction form provided by your bank or brokerage firm. If you lose your 16-digit control number, you may join the Revolution Medicines special meeting as a “Guest,” but you will not be able to vote, ask questions, or access the list of stockholders as of the Revolution Medicines record date.

The EQRx special meeting will be held completely virtually on the EQRx special meeting website, at www.virtualshareholdermeeting.com/EQRX2023SM, on November 8, 2023 at 11:00 a.m., Eastern Time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 10:45 a.m., Eastern Time, and you should allow ample time for check-in procedures. If you hold your shares through a bank or broker, instructions should also be provided on the voting instruction form provided by your bank or brokerage firm. If you lose your 16-digit control number, you may join the EQRx special meeting as a “Guest,” but you will not be able to vote, ask questions, or access the list of stockholders as of the EQRx record date.

If you choose to vote your shares electronically at your respective company’s special meeting, please bring required documentation in accordance with the section titled “The Revolution Medicines Special Meeting—Attending the Revolution Medicines Special Meeting” of this joint proxy statement/prospectus, with respect to the Revolution Medicines special meeting, and the section titled “The EQRx Special Meeting—Attending the EQRx Special Meeting” of this joint proxy statement/prospectus, with respect to the EQRx special meeting. The use of video, still photography or audio recording at either the Revolution Medicines special meeting or the EQRx special meeting is not permitted.

Even if you plan to virtually attend your company’s special meeting, Revolution Medicines and EQRx recommend that you vote your shares in advance as described below so that your vote will be counted if you later decide not to or become unable to attend the applicable special meeting.

For Revolution Medicines stockholders, if you do not return or submit your proxy or vote at the Revolution Medicines special meeting as provided in this joint proxy statement/prospectus, it will have no effect on the Revolution Medicines share issuance proposal or the Revolution Medicines adjournment proposal. The Revolution Medicines board of directors recommends that you vote “FOR” the Revolution Medicines share issuance proposal and “FOR” the Revolution Medicines adjournment proposal.

For EQRx stockholders, if you do not return or submit your proxy or vote at the EQRx special meeting as provided in this joint proxy statement/prospectus, the effect will be the same as a vote “AGAINST” the EQRx merger agreement proposal, and will have no effect on the EQRx compensation proposal or the EQRx adjournment proposal. The EQRx board of directors recommends that you vote “FOR” the EQRx merger agreement proposal, “FOR” the EQRx compensation proposal and “FOR” the EQRx adjournment proposal.

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The market price of shares of Revolution Medicines common stock that EQRx stockholders receive after the mergers are completed could be greater than, less than or the same as the market price of shares of Revolution Medicines common stock on the date of this joint proxy statement/prospectus or at the time of the special meetings. Accordingly, EQRx stockholders should obtain current market quotations for Revolution Medicines common stock and EQRx common stock before deciding how to vote with respect to the adoption of the merger agreement. Revolution Medicines common stock is traded on the Nasdaq Select under the symbol “RVMD” and EQRx common stock is traded on the Nasdaq Global under the symbol “EQRX.” Shares of common stock issued as merger consideration are expected to trade on the Nasdaq Select under the symbol “RVMD.”

For more information regarding the merger consideration to be received by EQRx equityholders if the mergers are completed, see the section titled “The Merger Agreement—Merger Consideration” of this joint proxy statement/prospectus.

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At the effective time:

The amount of any required withholding (as described further in “The Merger Agreement—Withholding Rights”) with respect to in-the-money EQRx options, EQRx RSUs and shares of EQRx restricted stock that are converted into shares of Revolution Medicines common stock at the effective time will be satisfied by selling shares of Revolution Medicines common stock and remitting the proceeds to the proper taxing authorities through Revolution Medicines.

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In considering the recommendations of the EQRx board of directors, EQRx stockholders should be aware that EQRx directors and executive officers have interests in the mergers that are different from, or in addition to, their interests as EQRx stockholders. These interests may include, among others, accelerated vesting of outstanding EQRx equity awards and payment of severance benefits. For a more complete description of these interests, see the information provided in the section titled “The Mergers—Interests of EQRx’s Directors and Executive Officers in the Mergers” of this joint proxy statement/prospectus.

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Revolution Medicines Proposal # 2: Revolution Medicines Adjournment Proposal. The Revolution Medicines special meeting may be adjourned to solicit additional proxies if there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal, with the affirmative vote of the holders of a majority of the votes cast for and against the Revolution Medicines adjournment proposal. Accordingly, a Revolution Medicines stockholder’s abstention from voting, a broker non-vote or the failure of a Revolution Medicines stockholder not present at the meeting to vote will have no effect on the Revolution Medicines adjournment proposal.

EQRx Proposal #2: EQRx Compensation Proposal. Assuming a quorum is present at the EQRx special meeting, the approval, on a non-binding, advisory basis, of the compensation that will or may be payable to EQRx’s named executive officers that is based on or otherwise relates to the transactions contemplated by the merger agreement, requires the affirmative vote of the holders of a majority of the votes properly cast for and against the EQRx compensation proposal. Accordingly, an EQRx stockholder’s abstention from voting, a broker non-vote or the failure of an EQRx stockholder to vote (including the failure of an EQRx stockholder who holds shares in “street name” through a bank, broker or other nominee to give voting instructions to that bank, broker or other nominee) will have no effect on the EQRx compensation proposal.

EQRx Proposal #3: EQRx Adjournment Proposal. The EQRx special meeting may be adjourned to solicit additional proxies if there are not sufficient votes at the time of the EQRx special meeting to approve the EQRx merger agreement proposal, with the affirmative vote of the holders of a majority of the votes cast for and against the EQRx adjournment proposal. Accordingly, an EQRx stockholder’s abstention from voting, a broker non-vote or the failure of an EQRx stockholder to vote (including the failure of an EQRx stockholder who holds shares in “street name” through a bank, broker or other nominee to give voting instructions to that bank, broker or other nominee) will have no effect on the EQRx adjournment proposal.

Yes. Contemporaneously with the execution of the merger agreement, Revolution Medicines entered into voting agreements with certain EQRx directors, executive officers and significant stockholders who held, as of July 31, 2023, more than 40% of the voting shares of EQRx, and EQRx entered into voting agreements with certain Revolution Medicines directors, executive officers and significant stockholders who held, as of July 31, 2023, approximately 8% of the voting shares of Revolution Medicines.

Pursuant to the EQRx voting agreements, each supporting EQRx stockholder has agreed, among other things, to vote its shares of EQRx common stock (i) in favor of the adoption of the merger agreement, and

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(ii) against (x) any action or agreement that would reasonably be expected to result in EQRx not being able to fulfill any of its closing conditions, as required by the merger agreement and (y) any competing transaction proposal.

Pursuant to the Revolution Medicines voting agreements, each Revolution Medicines supporting stockholder has agreed, among other things, to vote its shares of Revolution Medicines common stock (i) in favor of the Revolution Medicines share issuance proposal and (ii) against (x) any action or agreement that would reasonably be expected to result in Revolution Medicines not being able to fulfill any of its closing conditions, as required by the merger agreement and (y) any competing transaction proposal.

Copies of the form of Revolution Medicines voting agreements and form of EQRx voting agreements are attached as Annex C and Annex D, respectively, to this joint proxy statement/prospectus. For a more complete summary of the voting agreements, see the sections titled “The Ancillary Agreements—Revolution Medicines Voting Agreements” and “The Ancillary Agreements—EQRx Voting Agreements” of this joint proxy statement/prospectus.

Shares in “street name.” With respect to either the Revolution Medicines special meeting or the EQRx special meeting, if your shares are held in street name through a bank, broker or other nominee, you will

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receive instructions on how to vote from the bank or broker. You must follow their instructions in order for your shares to be voted. Internet and telephone voting also may be offered to stockholders owning shares through certain banks and brokers. If your shares are not registered in your own name and you would like to vote your shares at the Revolution Medicines special meeting, you may visit www.virtualshareholdermeeting.com/RVMD2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If your shares are not registered in your own name and you would like to vote your shares at the EQRx special meeting, you may visit www.virtualshareholdermeeting.com/EQRX2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If you hold your shares in street name and you do not receive a 16-digit control number, you may need to log in to your bank or brokerage firm’s website and select the shareholder communications mailbox to access the meeting and vote. Instructions should also be provided on the voting instruction form provided by your bank or brokerage firm.

Even if you plan to virtually attend the Revolution Medicines special meeting or the EQRx special meeting, Revolution Medicines and EQRx recommend that you submit a proxy to vote your shares in advance as described below so that your vote will be counted if you later decide not to or become unable to attend the respective special meeting. The use of video, still photography or audio recording is not permitted at either the Revolution Medicines special meeting or the EQRx special meeting.

Additional information on attending the special meetings can be found in the section titled “The Revolution Medicines Special Meeting” on page 51 of this joint proxy statement/prospectus and in the section titled “The EQRx Special Meeting” on page 60 of this joint proxy statement/prospectus.

Additional information on voting procedures can be found under the section titled “The Revolution Medicines Special Meeting” on page 51 of this joint proxy statement/prospectus and under the section titled “The EQRx Special Meeting” on page 60 of this joint proxy statement/prospectus.

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If your shares of common stock in Revolution Medicines or EQRx are held by a bank, broker or other nominee, you are considered the beneficial owner of shares held in “street name,” and your bank, broker or other nominee is considered the stockholder of record with respect to those shares. Your bank, broker or other nominee will provide you, as the beneficial owner, a package describing the procedure for voting your shares. You should follow the instructions provided by them to vote your shares. You are invited to attend the Revolution Medicines special meeting or the EQRx special meeting, as applicable. If your shares are not registered in your own name and you would like to vote your shares at the Revolution Medicines special meeting, you may visit www.virtualshareholdermeeting.com/RVMD2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If your shares are not registered in your own name and you would like to vote your shares at the EQRx special meeting, you may visit www.virtualshareholdermeeting.com/EQRX2023SM and enter the 16-digit control number included in the voting instruction form provided to you by your bank or brokerage firm. If you hold your shares in street name and you do not receive a 16-digit control number, you may need to log in to your bank or brokerage firm’s website and select the shareholder communications mailbox to access the meeting and vote. Instructions should also be provided on the voting instruction form provided by your bank or brokerage firm.

For Revolution Medicines stockholders, not instructing your bank, broker or other nominee how you wish to vote your shares will have no effect on the Revolution Medicines share issuance proposal or the Revolution Medicines adjournment proposal.

For EQRx stockholders, not instructing your bank, broker or other nominee how you wish to vote your shares will have the same effect as a vote “AGAINST” the EQRx merger agreement proposal, but will have no effect on the EQRx compensation proposal or the EQRx adjournment proposal.

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Record Holders. For shares held directly, please complete, sign, date and return each proxy card (or submit a proxy to cast your vote over the Internet, or by telephone, as provided on each proxy card) or otherwise follow the voting instructions provided in this joint proxy statement/prospectus in order to ensure that all of your shares of Revolution Medicines common stock or EQRx common stock are voted.

Shares in “street name.” For shares held in “street name” through a bank, broker or other nominee, you should follow the procedures provided by your bank, broker or other nominee to vote your shares.

Execution or revocation of a proxy will not in any way affect your right to attend the applicable special meeting and vote electronically at such special meeting. Attending the applicable special meeting will not, by itself, revoke a proxy.

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Written notices of revocation and other communications with respect to the revocation of proxies should be addressed:

For more information, see the section titled “The Revolution Medicines Special Meeting—Revocability of Proxies” of this joint proxy statement/prospectus and the section titled “The EQRx Special Meeting—Revocability of Proxies” of this joint proxy statement/prospectus, as applicable.

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If the mergers, taken together, qualify as a “reorganization,” a U.S. holder (as defined in the section titled “U.S. Federal Income Tax Consequences of the Mergers” of this joint proxy statement/prospectus) of EQRx common stock generally will not recognize any gain or loss for U.S. federal income tax purposes upon the exchange of EQRx common stock for Revolution Medicines common stock in the mergers, except with respect to cash received by such holder in lieu of fractional shares of Revolution Medicines common stock. If the mergers do not so qualify, the exchange of EQRx common stock for Revolution Medicines common stock in the mergers will be a taxable transaction for U.S. federal income tax purposes.

See the section titled “U.S. Federal Income Tax Consequences of the Mergers” of this joint proxy statement/prospectus for a more complete description of certain U.S. federal income tax consequences of the mergers. Please consult your tax advisors as to the specific tax consequences to you of the mergers, including the consequences if the mergers do not qualify as a “reorganization.”

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The obligation of each of Revolution Medicines and EQRx to consummate the mergers is also conditioned on, among other things:

No assurance can be given that the required consents and approvals will be obtained or that the required conditions to closing will be satisfied, and, even if all required consents and approvals are obtained and the conditions are satisfied, no assurance can be given as to the terms, conditions and timing of such consents and approvals. Any delay in completing the mergers could cause the combined company not to realize, or to be delayed in realizing, some or all of the benefits that Revolution Medicines and EQRx expect to achieve if the mergers are successfully completed within the expected timeframe. For a more complete summary of the conditions that must be satisfied or waived prior to completion of the mergers, see the sections titled “The Merger Agreement—Conditions to the Completion of the Mergers” and “The Mergers—Regulatory Approvals” of this joint proxy statement/prospectus.

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As a result of the process undertaken by EQRx to wind down its programs, EQRx may not have any product candidates in active clinical development nor any material research and development collaborations if the proposed mergers were not to be completed. Accordingly, EQRx’s future business prospects as a biopharmaceutical company would be limited unless EQRx is able to take steps to hire key personnel and rebuild a pipeline of product candidates through licenses, acquisitions or both, or through consummation of an alternative transaction. The EQRx board of directors also may determine to liquidate or dissolve EQRx. In such an event, the amount of cash available for distribution to EQRx stockholders will depend heavily on the timing of such liquidation or dissolution, as well as the amount of cash that will need to be reserved for commitments and contingent liabilities.

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RISK FACTORS

In deciding whether to vote for the Revolution Medicines share issuance proposal, in the case of Revolution Medicines stockholders, or the adoption of the merger agreement, in the case of EQRx stockholders, you are urged to carefully consider all of the information included or incorporated by reference in this joint proxy statement/prospectus, which is listed in the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus. You should also read and consider the risks associated with each of the businesses of Revolution Medicines and EQRx. The risks associated with the business of Revolution Medicines can be found in Revolution Medicines’ Annual Report on Form 10-K for the fiscal year ended December 31, 2022 and the risks associated with the business of EQRx can be found in EQRx’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, as such risks may be updated or supplemented in each company’s subsequently filed Quarterly Reports on Form 10-Q or Current Reports on Form 8-K (excluding any information and exhibits furnished under Item 2.02 or 7.01 thereof), each of which are incorporated by reference into this joint proxy statement/prospectus. In addition, you are urged to carefully consider the following material risks relating to the mergers, the business of Revolution Medicines, and the business of EQRx.

Risks Related to the Mergers

Because the exchange ratio depends on the price of Revolution Medicines common stock as well as the number of shares of EQRx common stock outstanding immediately prior to the completion of the first merger, which can fluctuate, the value of the merger consideration that EQRx equityholders will receive in the mergers is uncertain.

Upon completion of the first merger, each share of EQRx common stock that is issued and outstanding immediately prior to the effective time (other than excluded EQRx shares) will be converted automatically into the right to receive a number of shares of Revolution Medicines common stock equal to the exchange ratio, all as described in the section titled “The Merger Agreement—Merger Consideration.” The aggregate merger consideration will consist of a number of shares of Revolution Medicines common stock (including in respect of converted in-the-money EQRx options, EQRx RSUs and EQRx restricted stock) determined as follows: 7,692,308 shares of Revolution Medicines common stock; plus an additional number of shares of Revolution Medicines common stock, which will be determined prior to the EQRx special meeting and will represent $870.0 million of the aggregate purchase price divided by the pre-EQRx special meeting VWAP, applying a six percent discount. The exchange ratio will be determined by dividing the aggregate number of shares of Revolution Medicines common stock to be issued as merger consideration by the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement (which number of shares is not known at this time).

The value of the 7,692,308 shares of Revolution Medicines common stock already determined to be included in the merger consideration will depend upon the market price of Revolution Medicines common stock at the time the mergers are completed and the shares of Revolution Medicines common stock are delivered to EQRx equityholders. The number of additional shares of Revolution Medicines common stock to be included in the merger consideration will not be determined until closer proximity to the EQRx special meeting and, therefore, will depend upon the price of Revolution Medicines common stock during the five-day trading period used to determine the pre-EQRx special meeting VWAP.

As of the date of this joint proxy statement/prospectus, it is impossible to accurately predict the pre-EQRx special meeting VWAP or the number of shares of EQRx common stock, determined in accordance with the merger agreement, that will be outstanding as of immediately prior to the effective time and, therefore, impossible to accurately predict the exchange ratio and, thus, the total number or value of the shares of Revolution Medicines common stock that EQRx equityholders will receive in the mergers. The market price for Revolution Medicines common stock may fluctuate both prior to completion of the mergers and thereafter for a variety of reasons, including, among others, general market and economic conditions, changes in laws and

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regulations, other changes in Revolution Medicines’ business, financial condition, results of operations and prospects, developments in Revolution Medicines’ clinical programs and product candidates, market assessments of the likelihood that the mergers will be completed, and the expected timing of the mergers.

Many of these factors are beyond Revolution Medicines’ and EQRx’s control, and neither Revolution Medicines nor EQRx are permitted to terminate the merger agreement solely due to a decline in the market price of the common stock of the other party. In determining, in the case of EQRx stockholders, whether to vote for the adoption of the merger agreement, or, in the case of the Revolution Medicines stockholders, whether to vote for the Revolution Medicines share issuance proposal, you are urged to obtain current market quotations for Revolution Medicines common stock and EQRx common stock and refer to the press release and related Current Reports on Form 8-K to be issued by EQRx and Revolution Medicines with the calculation of the exchange ratio following determination of the pre-EQRx special meeting VWAP. In addition, see the section titled “Comparison of Revolution Medicines and EQRx Market Prices and Implied Value of Merger Consideration” of this joint proxy statement/prospectus.

The mergers may be delayed or may not be completed and the merger agreement may be terminated in accordance with its terms, which could negatively impact Revolution Medicines and/or EQRx.

The mergers are subject to a number of conditions that must be satisfied, some of which are beyond the control of Revolution Medicines and EQRx, may not be satisfied or waived in a timely manner or at all, and, accordingly, the mergers may be delayed or not completed. These conditions include:

The obligation of each of Revolution Medicines and EQRx to consummate the mergers is also conditioned on, among other things, the absence of a material adverse effect on the other party, the truth and correctness of the representations and warranties made by the other party on the date of the merger agreement and on the closing date (subject to certain materiality qualifiers), and the performance by the other party in all material respects of its obligations under the merger agreement. No assurance can be given that the required consents and approvals will be obtained or that the required conditions to closing will be satisfied, and, if all required consents and approvals are obtained and the conditions are satisfied, no assurance can be given as to the terms, conditions and timing of such consents and approvals. Any delay in completing the mergers could cause Revolution Medicines not to realize, or to be delayed in realizing, some or all of the benefits that Revolution Medicines expects to achieve if the mergers are successfully completed within the expected time frame. For a more complete summary of the conditions that must be satisfied or waived prior to completion of the mergers, see the section titled “The Merger Agreement—Conditions to the Completion of the Mergers” of this joint proxy statement/prospectus.

Additionally, either Revolution Medicines or EQRx may terminate the merger agreement under certain circumstances, including, among other reasons, if the first merger has not been consummated prior to 12:00 a.m.,

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Eastern Time, on January 31, 2024. In addition, if the merger agreement is terminated under certain circumstances specified in the merger agreement, Revolution Medicines would be required to pay EQRx a termination fee of $65,000,000, or EQRx would be required to pay Revolution Medicines a termination fee of $25,000,000. Additionally, if the merger agreement is terminated because of failure of one party to obtain the required stockholder approval and no termination fee is payable, the party who did not receive approval shall reimburse the other party’s reasonable, documented expenses, up to $10,000,000. See the section titled “The Merger Agreement—Termination of the Merger Agreement” of this joint proxy statement/prospectus and the section titled “The Merger Agreement—Termination Fees” of this joint proxy statement/prospectus for a more complete discussion of the circumstances under which the merger agreement could be terminated and when a termination fee may be payable by Revolution Medicines or EQRx.

If the mergers are not completed for any reason, including as a result of a failure to obtain the required Revolution Medicines stockholder vote to approve the Revolution Medicines share issuance proposal or the required EQRx stockholder vote to approve the EQRx merger agreement proposal, the ongoing businesses of Revolution Medicines and EQRx may be adversely affected and, without realizing any of the benefits of having completed the mergers, Revolution Medicines and EQRx would be subject to a number of risks, including the following:

Further, EQRx has commenced a process to wind-down and terminate its current product pipeline and other research and development activities and, thus, if the mergers are not completed, EQRx may not have any product candidates in active clinical development nor any material research and development collaborations. Accordingly, EQRx’s future business prospects as a biopharmaceutical company will be extremely limited unless it is able to take steps to hire key personnel and rebuild a pipeline of product candidates through licenses, acquisitions or both, or through consummation of an alternative transaction. There is substantial uncertainty about EQRx’s ability to undertake such efforts. The EQRx board of directors may determine to liquidate or dissolve the company. In such an event, the amount of cash available for distribution to its stockholders will depend heavily on the timing of such liquidation or dissolution, as well as the amount of cash that will need to be reserved for commitments and contingent liabilities.

In addition, if the mergers are not completed, Revolution Medicines and EQRx could be subject to litigation related to any failure to complete the mergers or to perform their respective obligations under the merger agreement. If the mergers are not completed, Revolution Medicines and EQRx cannot assure their stockholders that these risks will not materialize and will not materially affect the business, financial condition, results of operations and stock prices of Revolution Medicines or EQRx.

The market price for shares of Revolution Medicines common stock following the completion of the mergers may be affected by factors different from, or in addition to, those that historically have affected or currently affect the market prices of shares of Revolution Medicines common stock and EQRx common stock.

Upon consummation of the mergers, EQRx stockholders will become Revolution Medicines stockholders. Revolution Medicines’ business differs from that of EQRx in certain respects, and, accordingly, the financial

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condition and results of operations of Revolution Medicines after completion of the mergers, as well as the market price of shares of Revolution Medicines common stock, may be affected by factors that are different from those currently or historically affecting the financial condition and results of operations of Revolution Medicines or EQRx. In addition, the stock market has experienced significant price and volume fluctuations in recent times, which, if they continue to occur, could adversely affect the market for, or liquidity of, Revolution Medicines common stock, regardless of Revolution Medicines’ actual results of operations. For a discussion of the businesses of each of Revolution Medicines and EQRx and some important factors to consider in connection with those businesses, please see the section titled “The Parties to the Mergers” of this joint proxy statement/prospectus and the documents and information included elsewhere in this joint proxy statement/prospectus or incorporated by reference into this joint proxy statement/prospectus and listed under the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

The shares of Revolution Medicines common stock to be received by EQRx stockholders as a result of the first merger will have rights different from the shares of EQRx common stock.

Upon consummation of the first merger, the rights of EQRx stockholders, who will become Revolution Medicines stockholders, will be governed by the governing corporate documents of Revolution Medicines in effect at the effective time, including the amended and restated certificate of incorporation and amended and restated bylaws of Revolution Medicines. The rights associated with EQRx common stock are different from the rights which will be associated with Revolution Medicines common stock. See the section titled “Comparison of Stockholders’ Rights” of this joint proxy statement/prospectus for a discussion of these rights.

After the mergers, EQRx stockholders will have a significantly lower ownership and voting interest in Revolution Medicines than they currently have in EQRx and will exercise less influence over management and policies of Revolution Medicines after completion of the mergers.

After completion of the mergers, the current securityholders of EQRx will own a smaller percentage of Revolution Medicines than their current ownership of EQRx prior to the mergers. The actual number of shares of Revolution Medicines common stock to be issued and reserved for issuance in connection with the mergers will be determined at completion of the mergers based on the terms of the merger agreement and the exchange ratio. Based on the number of shares of common stock of each of Revolution Medicines and EQRx outstanding on September 15, 2023, the latest practicable date prior to the date of this joint proxy statement/prospectus, and assuming that the exchange ratio is 0.0734, as determined by the volume-weighted average closing price per share of Revolution Medicines common stock for the five trading days ending on and including September 15, 2023, upon completion of the mergers, former EQRx stockholders are expected to own approximately 23.8% of the outstanding shares of Revolution Medicines common stock and Revolution Medicines stockholders immediately prior to the mergers are expected to own approximately 76.2% of the outstanding shares of Revolution Medicines common stock. Consequently, former EQRx stockholders will have less influence over the management and policies of Revolution Medicines after completion of the mergers than they currently have over the management and policies of EQRx.

Until the completion of the mergers or the termination of the merger agreement in accordance with its terms, Revolution Medicines and EQRx are each prohibited from entering into certain transactions and taking certain actions that might otherwise be beneficial to Revolution Medicines or EQRx and their respective stockholders.

From and after the date of the merger agreement and prior to completion of the mergers, the merger agreement:

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These restrictions may prevent Revolution Medicines or EQRx from making certain changes to their respective businesses or organizational structures or from pursuing attractive business opportunities that may arise prior to the completion of the mergers, and could have the effect of delaying or preventing other strategic transactions. Adverse effects arising from the pendency of the mergers could be exacerbated by any delays in consummation of the mergers or termination of the merger agreement. See the section titled “The Merger Agreement—Conduct of Business Prior to the Effective Time” of this joint proxy statement/prospectus.

The mergers, and uncertainty regarding the mergers, may cause current or future distributors, suppliers or strategic partners to delay or defer decisions concerning Revolution Medicines and EQRx and adversely affect each company’s ability to effectively manage their respective businesses.

The mergers will happen only if the stated conditions are met, including the relevant stockholder approvals, among other conditions. Many of the conditions are outside the control of Revolution Medicines and EQRx, and both parties also have certain rights to terminate the merger agreement. Accordingly, there may be uncertainty regarding the completion of the mergers. This uncertainty may cause current or future distributors, suppliers, vendors, strategic partners or others that deal with Revolution Medicines or EQRx to delay or defer entering into contracts with Revolution Medicines or EQRx or making other decisions concerning Revolution Medicines or EQRx or could cause such distributors, suppliers, vendors, strategic partners or others to seek to change or cancel existing business relationships with Revolution Medicines or EQRx, which could negatively affect their respective businesses. Any delay or deferral of those decisions or changes in existing agreements could have an adverse impact on the respective businesses of Revolution Medicines and EQRx, regardless of whether the mergers are ultimately completed.

Whether or not the mergers are completed, the announcement and pendency of the mergers will divert significant management resources to complete the mergers, which could have an adverse effect on Revolution Medicines’ and EQRx’s respective businesses, results of operations and/or market prices.

Whether or not the mergers are completed, the announcement and pendency of the mergers could cause disruptions in the businesses of Revolution Medicines and EQRx by directing the attention of management of each of Revolution Medicines and EQRx toward the completion of the mergers and, with respect to EQRx, the wind-down of its current product pipeline and other research and development activities. Revolution Medicines and EQRx have each diverted significant management resources in an effort to complete the mergers and are each subject to restrictions contained in the merger agreement on the conduct of their respective businesses in the period prior to the completion of the mergers. If the mergers are not completed, Revolution Medicines and EQRx will have incurred significant costs, including the diversion of management resources, for which they will have received little or no benefit.

The directors and executive officers of EQRx have interests and arrangements that may be different from, or in addition to, those of Revolution Medicines and EQRx stockholders generally.

When considering the recommendations of the EQRx board of directors with respect to the proposals described in this joint proxy statement/prospectus, stockholders should be aware that the directors and executive officers of EQRx have interests in the mergers that are different from, or in addition to, those of EQRx stockholders generally. These interests include the treatment in the mergers of outstanding equity, equity-based and incentive awards, severance arrangements, and other compensation and benefit arrangements and the right to continued indemnification of former EQRx directors and officers by Revolution Medicines.

EQRx stockholders should be aware of these interests when they consider the recommendation of the EQRx board of directors that they adopt the merger agreement. The interests of EQRx’s directors and executive officers

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are described in more detail in the section titled “The Mergers—Interests of EQRx’s Directors and Executive Officers in the Mergers” of this joint proxy statement/prospectus.

Revolution Medicines or EQRx may waive one or more of the closing conditions without re-soliciting stockholder approval.

To the extent permitted by law, Revolution Medicines or EQRx may determine to waive, in whole or part, one or more of the conditions to its obligations to consummate the mergers. Revolution Medicines and EQRx currently expect to evaluate the materiality of any waiver and its effect on Revolution Medicines and EQRx stockholders, as applicable, in light of the facts and circumstances at the time to determine whether any amendment of this joint proxy statement/prospectus or any re-solicitation of proxies or voting cards is required in light of such waiver. Any determination whether to waive any condition to the mergers or as to re-soliciting stockholder approval or amending this joint proxy statement/prospectus as a result of a waiver will be made by Revolution Medicines and EQRx, as applicable, at the time of such waiver based on the facts and circumstances as they exist at that time.

Each of Revolution Medicines and EQRx will incur significant transaction and merger-related costs in connection with the mergers.

Revolution Medicines and EQRx have each incurred and expect to incur a number of non-recurring costs associated with Revolution Medicines’ acquisition of EQRx, as well as transaction fees and other costs related to the mergers. These costs and expenses include fees paid to financial, legal and accounting advisors, facilities and systems consolidation costs, severance and other potential employment-related costs, filing fees, printing expenses and other related charges. Some of these costs are payable by Revolution Medicines or EQRx regardless of whether the mergers are completed. While both Revolution Medicines and EQRx have assumed that certain expenses would be incurred in connection with the mergers and the other transactions contemplated by the merger agreement, there are many factors beyond their control that could affect the total amount or the timing of any implementation expenses.

EQRx stockholders will not be entitled to appraisal rights in the mergers.

Appraisal rights are statutory rights that, if applicable under law, enable stockholders of a corporation to dissent from an extraordinary transaction, such as a merger, and to demand that such corporation pay the fair value for their shares as determined by a court in a judicial proceeding instead of receiving the consideration offered to such stockholders in connection with the transaction. Under the DGCL, stockholders do not have appraisal rights if the shares of stock they hold are either listed on a national securities exchange or held of record by more than 2,000 holders. Notwithstanding the foregoing, appraisal rights are available if stockholders are required by the terms of the merger agreement to accept for their shares anything other than (a) shares of stock of the surviving corporation, (b) shares of stock of another corporation that will either be listed on a national securities exchange or held of record by more than 2,000 holders, (c) cash in lieu of fractional shares or (d) any combination of the foregoing.

Because shares of Revolution Medicines common stock are listed on the Nasdaq Select, a national securities exchange, and because EQRx stockholders are not required by the terms of the merger agreement to accept for their shares anything other than shares of Revolution Medicines common stock and cash in lieu of fractional shares, holders of EQRx common stock will not be entitled to appraisal rights in the mergers. See the section titled “The Merger Agreement—No Appraisal Rights” of this joint proxy statement/prospectus.

EQRx warrants could increase the number of shares eligible for future resale in the public market and result in dilution to the stockholders.

As of August 31, 2023, EQRx had outstanding warrants exercisable for 19,733,290 shares of EQRx common stock with an exercise price of $11.50 per share. At the effective time, each EQRx warrant that is

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outstanding and unexercised immediately prior to the effective time will, in accordance with its terms, automatically cease to represent a warrant exercisable for EQRx common stock and will become a warrant exercisable for the merger consideration that such holder would have received if the EQRx warrant had been exercised immediately prior to the effective time. For the avoidance of doubt, no holder of an EQRx warrant will be entitled to receive any merger consideration in exchange for such EQRx warrant.

To the extent the trading price of Revolution Medicines common stock multiplied by the exchange ratio exceeds the applicable exercise price for the EQRx warrants, the shares of Revolution Medicines common stock issued upon exercise of any of the EQRx warrants will result in dilution to the then existing holders of Revolution Medicines common stock and increase the number of shares eligible for resale in the public market. Sales of substantial numbers of such shares in the public market could adversely affect the market price of the Revolution Medicines common stock.

The merger agreement contains provisions that could discourage a potential competing acquirer that might be willing to pay more to acquire or merge with either EQRx or Revolution Medicines.

Each of EQRx and Revolution Medicines is subject to certain restrictions on its ability to solicit alternative acquisition proposals from third parties, to provide information to third parties and to enter into or continue discussions or negotiations with third parties regarding alternative acquisition proposals, subject to customary exceptions. In addition, if the merger agreement is terminated under certain circumstances specified in the merger agreement, Revolution Medicines would be required to pay EQRx a termination fee of $65,000,000, or EQRx would be required to pay Revolution Medicines a termination fee of $25,000,000. These provisions could discourage a potential competing acquirer that might have an interest in acquiring all or a significant part of either company from considering or proposing such an acquisition.

The MTS opinion rendered to the EQRx board of directors does not and will not reflect changes in circumstances between the signing of the merger agreement and the closing of the mergers.

The EQRx board of directors has not obtained an opinion from its financial advisor as of the date of this joint proxy statement/prospectus since the opinion provided on July 31, 2023, nor does it expect to receive an updated, revised or reaffirmed opinion prior to the completion of the mergers. Changes in the business, operations and prospects of EQRx or Revolution Medicines, general market and economic conditions and other factors that may be beyond the control of EQRx and Revolution Medicines, and on which the MTS opinion was based, may significantly alter the value of EQRx or Revolution Medicines or the prices of EQRx common stock or Revolution Medicines common stock by the time the mergers are completed. The MTS opinion does not speak as of the time the mergers will be completed or as of any date other than the date of such opinion. Because MTS Securities will not be updating the MTS opinion, such opinion will not address the fairness of the exchange ratio from a financial point of view at the time the mergers are completed. For a description of the opinion that the EQRx board of directors received from MTS Securities, see the section titled “The Mergers—Opinion of MTS, EQRx’s Financial Advisor.”

If the mergers, taken together, do not qualify as a “reorganization” under Section 368(a) of the Code, U.S. holders of EQRx common stock may be required to pay additional U.S. federal income taxes. There are significant factual and legal uncertainties as to whether the mergers will qualify as a “reorganization.”

For U.S. federal income tax purposes, the mergers, taken together, are intended to qualify as a “reorganization” within the meaning of Section 368(a) of the Code. However, there are significant factual and legal uncertainties as to whether the mergers will qualify as a reorganization, particularly given the wind-down of EQRx’s research and development programs and operations, as described in this joint proxy statement/prospectus. See the section titled “U.S. Federal Income Tax Consequences of the Mergers” of this joint proxy statement/prospectus for a more detailed discussion of such uncertainties.

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In connection with the filing of the registration statement of which this proxy statement/prospectus is a part, Goodwin Procter LLP, counsel to EQRx, has delivered an opinion to the effect that it is more likely than not that the mergers will qualify as a “reorganization.” Such opinion of counsel is based on, among other things, certain factual representations made by EQRx and Revolution Medicines and certain assumptions, all of which must be consistent with the state of facts existing at the time of the mergers. If any of these representations and assumptions are, or become, inaccurate or incomplete, such opinion may be invalid. An opinion of counsel represents counsel’s best legal judgment and is not binding on the IRS or the courts, which may not agree with the conclusions set forth in such opinion, including with respect to the uncertainties referred to above and discussed in more detail in the section titled “U.S. Federal Income Tax Consequences of the Mergers.” The closing of the mergers is not conditioned upon achieving, or receiving a ruling from the IRS or opinion of counsel with respect to, such qualification.

If the mergers do not qualify as a “reorganization” within the meaning of Section 368(a) of the Code, a U.S. holder of EQRx common stock generally would recognize gain or loss for U.S. federal income tax purposes on each share of EQRx common stock surrendered in the first merger in an amount equal to the difference between the fair market value, at the time of the first merger, of the Revolution Medicines common stock received in the first merger (including any cash received in lieu of a fractional share of Revolution Medicines common stock) and such holder’s adjusted tax basis in the EQRx common stock surrendered in the first merger. Gain or loss must be calculated separately for each block of EQRx common stock exchanged by such U.S. holder if such blocks were acquired at different times or for different prices. Any gain or loss recognized generally would be capital gain or loss, and generally would be long-term capital gain or loss if the U.S. holder’s holding period in a particular block of EQRx common stock is more than one year at the effective time of the first merger. Long-term capital gain of certain non-corporate taxpayers, including individuals, generally is taxed at reduced U.S. federal income tax rates. The deductibility of capital losses is subject to limitations. A U.S. holder’s tax basis in shares of Revolution Medicines common stock received in the first merger would be equal to the fair market value thereof as of the effective time of the first merger, and such U.S. holder’s holding period in such shares would begin on the day following the closing of the first merger.

See the section titled “U.S. Federal Income Tax Consequences of the Mergers” of this joint proxy statement/prospectus for a more complete description of certain U.S. federal income tax consequences of the mergers. Please consult your tax advisors as to the specific tax consequences to you of the mergers, including the consequences if the mergers do not qualify as a “reorganization” for any reason.

Risks Relating to Revolution Medicines After Completion of the Mergers

There can be no assurance that Revolution Medicines will be able to comply with the continued listing standards of Nasdaq.

If Revolution Medicines fails to satisfy the continued listing requirements of Nasdaq, such as the corporate governance requirements or the minimum share price requirement, Nasdaq may take steps to delist Revolution Medicines’ securities. Such a delisting would likely have a negative effect on the price of the securities and would impair stockholders’ ability to sell or purchase the securities when they wish to do so. In the event of a delisting, Revolution Medicines can provide no assurance that any action taken by it to restore compliance with listing requirements would allow the securities to become listed again, stabilize the market price or improve the liquidity of the securities, prevent the securities from dropping below the Nasdaq minimum share price requirement or prevent future non-compliance with Nasdaq’s listing requirements. Additionally, if the securities are not listed on, or become delisted from Nasdaq, for any reason, and are quoted on the OTC Bulletin Board, an inter-dealer automated quotation system for equity securities that is not a national securities exchange, the liquidity and price of the securities may be more limited than if Revolution Medicines were quoted or listed on Nasdaq or another national securities exchange. Stockholders may be unable to sell their securities unless a market can be established or sustained.

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Revolution Medicines may be exposed to increased litigation, which could have an adverse effect on the Revolution Medicines’ business and operations.

Revolution Medicines may be exposed to increased litigation from stockholders, distributors, suppliers, consumers and other third parties after completion of the mergers. Such litigation may have an adverse impact on Revolution Medicines’ business and results of operations or may cause disruptions to Revolution Medicines’ operations.

The unaudited pro forma condensed combined financial information included in this joint proxy statement/prospectus may not be indicative of what Revolution Medicines’ actual financial position or results of operations would have been.

The unaudited pro forma condensed combined financial information included in this joint proxy statement/prospectus is presented solely for illustrative purposes and is not necessarily indicative of what Revolution Medicines’ actual financial position or results of operations would have been had the mergers been completed on the dates indicated. This unaudited pro forma condensed combined financial information reflects adjustments that were developed using preliminary estimates based on available information and various assumptions, and may be revised as additional information becomes available. Accordingly, the final acquisition accounting adjustments may differ materially from the pro forma adjustments reflected in this joint proxy statement/prospectus.

While presented with numeric specificity, the Revolution Medicines and EQRx unaudited pro forma condensed combined financial information provided in this joint proxy statement/prospectus is based on numerous variables and assumptions (including, but not limited to, those related to general business, the biotechnology and related industries, and economic, market and financial conditions and additional matters specific to Revolution Medicines’ or EQRx’s business, as applicable) that are inherently subjective and uncertain and are beyond the control of the respective management teams of Revolution Medicines and EQRx. As a result, actual results may differ materially from the unaudited pro forma condensed combined financial information. Important factors that may affect actual results and cause these unaudited projected financial forecasts to not be achieved include, but are not limited to, risks and uncertainties relating to Revolution Medicines’ business (including its ability to achieve strategic goals, objectives and targets over applicable periods), industry performance, general business and economic conditions. See the section titled “Unaudited Pro Forma Condensed Combined Financial Information.”

Risks Relating to Revolution Medicines’ Business

Revolution Medicines’ business will continue to be subject to the risks described in the sections titled “Risk Factors” in Revolution Medicines’ Quarterly Report on Form 10-Q for the quarterly period ended June 30, 2023, and in other documents incorporated by reference into this joint proxy statement/prospectus. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus for the location of information incorporated by reference into this joint proxy statement/prospectus.

Risks Relating to EQRx’s Business

EQRx’s business will continue to be subject to the risks described in the sections titled “Risk Factors” in EQRx’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, in EQRx’s Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2023 and September 30, 2023 and in other documents incorporated by reference into this joint proxy statement/prospectus. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus for the location of information incorporated by reference into this joint proxy statement/prospectus.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This registration statement on Form S-4, of which this joint proxy statement/prospectus forms a part, and the documents to which Revolution Medicines and EQRx refer you to in this registration statement, as well as oral statements made or to be made by Revolution Medicines and EQRx, include certain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks and uncertainties and are made pursuant to the safe harbor provisions of Section 27A of the Securities Act, and Section 21E of the Exchange Act. The words “believe,” “continue,” “could,” “expect,” “anticipate,” “intends,” “estimate,” “forecast,” “project,” “should,” “may,” “will,” “would” or the negative thereof and similar expressions are intended to identify such forward-looking statements. These forward-looking statements are only predictions and involve known and unknown risks and uncertainties, many of which are beyond the control of Revolution Medicines and EQRx. Statements in or incorporated by reference into this registration statement regarding Revolution Medicines, EQRx, or the proposed mergers, referred to as the proposed transaction, that are forward-looking, including statements regarding the anticipated benefits of the proposed transaction, the impact of the proposed transaction on Revolution Medicines’ and EQRx’s employees, business and future financial and operating results, the ability of the parties to complete the proposed transaction considering the various closing conditions, the closing date for the proposed transaction, Revolution Medicines’ expectation to not advance EQRx’s research and development portfolio following closing of the proposed transaction, and EQRx’s expectation to wind down its programs, are based on Revolution Medicines’ and EQRx’s management’s estimates, assumptions and projections, and are subject to significant uncertainties and other factors, many of which are beyond Revolution Medicines’ and EQRx’s control. These factors and risks include, but are not limited to:

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In addition, material risks that could cause actual results to differ from forward-looking statements include: the inherent uncertainty associated with financial or other projections; the companies’ ability to obtain the approval of the proposed transaction by EQRx stockholders and the approval of the Revolution Medicines share issuance proposal and the timing of the closing of the proposed transaction, including the risk that the conditions to the transaction are not satisfied on a timely basis or at all and the failure of the proposed transaction to close for any other reason; the risk that a consent or authorization that may be required for the proposed transaction is not obtained or is obtained subject to conditions that are not anticipated; unanticipated difficulties or expenditures relating to the proposed transaction, the response of business partners and retention as a result of the announcement and pendency of the proposed transaction; and the diversion of management time in connection with the proposed transaction.

For further discussion of these and other risks, contingencies and uncertainties applicable to Revolution Medicines and EQRx, see the section titled “Risk Factors” of this joint proxy statement/prospectus and in Revolution Medicines’ and EQRx’s other filings with the SEC incorporated by reference into this joint proxy statement/prospectus. See also the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus for more information about the SEC filings incorporated by reference into this joint proxy statement/prospectus.

All subsequent written or oral forward-looking statements attributable to Revolution Medicines or EQRx or any person acting on its or their behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section. The forward-looking statements included in this joint proxy statement/prospectus are made only as of the date of this joint proxy statement/prospectus. Neither Revolution Medicines nor EQRx is under any obligation, and each expressly disclaims any obligation, to update, alter, or otherwise revise any forward-looking statements, whether written or oral, that may be made from time to time, whether as a result of new information, future events or otherwise, except as may be required by law.

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THE PARTIES TO THE MERGERS

Revolution Medicines, Inc.

700 Saginaw Drive

Redwood City, California 94063

(650) 481-6801

Revolution Medicines is a clinical-stage precision oncology company focused on developing targeted therapies to inhibit frontier targets in RAS-addicted cancers. Revolution Medicines possess sophisticated structure-based drug discovery capabilities built upon deep chemical biology and cancer pharmacology know-how and innovative, proprietary technologies that enable the creation of small molecules tailored to unconventional binding sites. Revolution Medicines’ understanding of genetic drivers and adaptive resistance mechanisms in cancer, coupled with robust drug discovery and medicinal chemistry capabilities, has guided it to establish a deep pipeline targeting critical signaling nodes within the RAS pathway and associated pathways. This cohesive approach underpins its clinical strategy of exploring mechanism-based dosing paradigms and in-pathway combinations to optimize treatment for cancer patients.

Revolution Medicines’ research and development pipeline comprises RAS(ON) inhibitors that bind directly to RAS variants, which it refers to as RAS(ON) Inhibitors, and RAS companion inhibitors that target key nodes in the RAS pathway or associated pathways, which it refer to as RAS Companion Inhibitors. Revolution Medicines’ RAS Companion Inhibitors are designed primarily for combination treatment strategies involving one or more therapeutic agents, which particularly may include our RAS(ON) Inhibitors. Revolution Medicines’ long-term goal is to combine our RAS(ON) Inhibitors with selected RAS Companion Inhibitors or other therapies on behalf of patients based on molecular tumor features.

Revolution Medicines common stock is listed on Nasdaq Select under the ticker symbol “RVMD.”

For more information about Revolution Medicines, please visit Revolution Medicines’ website at www.revmed.com. The information contained on Revolution Medicines’ website or accessible through it (other than the documents specifically incorporated by reference herein) does not constitute a part of this joint proxy statement/prospectus or any other report or document on file with or furnished to the SEC. Additional information about Revolution Medicines is included in the documents incorporated by reference into this joint proxy statement/prospectus. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

Equinox Merger Sub, Inc.

700 Saginaw Drive

Redwood City, California 94063

(650) 481-6801

Equinox Merger Sub, Inc., a newly formed and a direct, wholly owned subsidiary of Revolution Medicines, is a Delaware corporation that was formed on July 21, 2023, for the sole purpose of effecting the mergers. Under the merger agreement, Equinox Merger Sub, Inc. will merge with and into EQRx as of the effective time, and EQRx will continue as the surviving corporation and a wholly owned subsidiary of Revolution Medicines. Equinox Merger Sub, Inc. will be renamed EQRx, Inc. following the completion of the first merger.

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Equinox Merger Sub II LLC

700 Saginaw Drive

Redwood City, California 94063

(650) 481-6801

Equinox Merger Sub II LLC, a newly formed and a direct, wholly owned subsidiary of Revolution Medicines, is a Delaware limited liability company that was formed on July 21, 2023, for the sole purpose of effecting the mergers. Under the merger agreement, Equinox Merger Sub II LLC will merge with and into EQRx as of the effective time of the second merger, and Equinox Merger Sub II LLC will continue as the surviving entity and a wholly owned subsidiary of Revolution Medicines. Equinox Merger Sub II LLC will be renamed EQRx, LLC following the completion of the mergers.

EQRx, Inc.

50 Hampshire Street

Cambridge, Massachusetts 02139

(617) 315-2255

EQRx is a biopharmaceutical company with a focus on developing and commercializing innovative medicines for some of the most prevalent disease areas, including cancer and immune-inflammatory conditions.

EQRx common stock is listed on the Nasdaq Global under the ticker symbol “EQRX.”

For more information about EQRx, please visit EQRx’s website at https://eqrx.com/. The information contained on EQRx’s website or accessible through it (other than the documents specifically incorporated by reference herein) does not constitute a part of this joint proxy statement/prospectus or any other report or document on file with or furnished to the SEC. Additional information about EQRx is included in the documents incorporated by reference into this joint proxy statement/prospectus. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

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THE REVOLUTION MEDICINES SPECIAL MEETING

This joint proxy statement/prospectus is being mailed on or about September 29, 2023 to holders of record of Revolution Medicines common stock as of the close of business on September 26, 2023 and constitutes notice of the Revolution Medicines special meeting in conformity with the requirements of the DGCL and the bylaws of Revolution Medicines, which are referred to as the Revolution Medicines bylaws.

This joint proxy statement/prospectus is being provided to Revolution Medicines stockholders as part of a solicitation of proxies by the Revolution Medicines board of directors for use at the Revolution Medicines special meeting and at any adjournments or postponements of the Revolution Medicines special meeting. Revolution Medicines stockholders are encouraged to read the entire document carefully, including the annexes to and documents incorporated by reference into this document, for more detailed information regarding the merger agreement and the transactions contemplated by the merger agreement.

Date, Time and Place of the Revolution Medicines Special Meeting

The Revolution Medicines special meeting is scheduled to be held completely virtually at the Revolution Medicines special meeting website, at www.virtualshareholdermeeting.com/RVMD2023SM, on November 8, 2023, beginning at 8:00 a.m., Pacific Time, unless adjourned or postponed to a later date and/or time.

Matters to be Considered at the Revolution Medicines Special Meeting

The purposes of the Revolution Medicines special meeting are as follows, each as further described in this joint proxy statement/prospectus:

Recommendation of the Revolution Medicines Board of Directors

The Revolution Medicines board of directors recommends that Revolution Medicines stockholders vote:

After careful consideration, the Revolution Medicines board of directors (1) adopted and approved the merger agreement and the consummation of the transactions upon the terms and conditions set forth in the merger agreement, (2) determined that the terms of the merger agreement, the mergers and the other transactions are fair to, and in the best interests of, Revolution Medicines and its stockholders, (3) directed that the Revolution Medicines share issuance proposal be submitted to the stockholders of Revolution Medicines for adoption, (4) recommended that the stockholders of Revolution Medicines approve the Revolution Medicines share issuance proposal and (5) declared that the Revolution Medicines share issuance proposal is advisable.

See also the section titled “The Mergers—Recommendation of the Revolution Medicines Board of Directors; Revolution Medicines’ Reasons for the Mergers” of this joint proxy statement/prospectus.

Record Date for the Revolution Medicines Special Meeting and Voting Rights

The record date to determine who is entitled to receive notice of and to vote at the Revolution Medicines special meeting is September 26, 2023. As of the close of business on the Revolution Medicines record date, there were 109,448,831 shares of Revolution Medicines common stock issued and outstanding, each entitled to vote at the Revolution Medicines special meeting. Each Revolution Medicines stockholder will have one vote for

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any matter properly brought before the Revolution Medicines special meeting for each share of Revolution Medicines common stock such holder held at the close of business on the Revolution Medicines record date. Only Revolution Medicines stockholders of record at the close of business on the Revolution Medicines record date are entitled to receive notice of and to vote at the Revolution Medicines special meeting.

Quorum; Abstentions and Broker Non-Votes

A quorum of stockholders is necessary to conduct the Revolution Medicines special meeting. The holders of a majority in voting power of the shares of Revolution Medicines common stock issued and outstanding and entitled to vote at the meeting must be represented at the Revolution Medicines special meeting electronically or by proxy in order to constitute a quorum. On the Revolution Medicines record date, there were 109,448,831 shares of Revolution Medicines common stock outstanding and entitled to vote. Thus, the holders of 54,724,416 shares must be present or represented by proxy at the Revolution Medicines special meeting to establish a quorum. Abstentions will be counted for purposes of determining whether a quorum exists. If a quorum is not present, the Revolution Medicines special meeting will be adjourned until the holders of the number of shares of Revolution Medicines common stock required to constitute a quorum attend, whether electronically or by proxy.

Banks, brokers or other nominees who hold shares in “street name” for a beneficial owner of those shares typically have the authority to vote in their discretion on “routine” proposals when they have not received instructions from beneficial owners. However, banks, brokers or other nominees are not allowed to exercise their voting discretion with respect to the approval of matters that are “non-routine.” Generally, a broker non-vote occurs on an item when (a) a bank, broker or other nominee has discretionary authority to vote on one or more “routine” proposals to be voted on at a meeting of stockholders, but is not permitted to vote on other “non-routine” proposals without instructions from the beneficial owner of the shares and (b) the beneficial owner fails to provide the bank, broker or other nominee with such instructions. “Non-routine” matters include the Revolution Medicines share issuance proposal (Revolution Medicines Proposal #1) and the Revolution Medicines adjournment proposal (Revolution Medicines Proposal #2). It is therefore not expected that there will be any broker non-votes at the Revolution Medicines Special Meeting, and consequently, with respect to the Revolution Medicines share issuance proposal (Revolution Medicines Proposal #1) and the Revolution Medicines adjournment proposal (Revolution Medicines Proposal #2), if you hold your shares of Revolution Medicines common stock in “street name,” your shares will not be voted on any matter unless you affirmatively instruct your bank, broker or other nominee how to vote your shares. It is therefore critical that you cast your vote by instructing your bank, broker or other nominee on how to vote.

If you submit a properly executed proxy card, even if you abstain from voting or vote against any or all of the proposals at the Revolution Medicines special meeting, your shares of Revolution Medicines common stock will be counted as present for purposes of determining whether a quorum is present at the Revolution Medicines special meeting. Executed but unvoted proxies will be voted in accordance with the recommendations of the Revolution Medicines board of directors. If additional votes must be solicited to adopt the Revolution Medicines share issuance proposal, it is expected that the meeting will be adjourned to solicit additional proxies.

Required Votes; Vote of Revolution Medicines’ Directors and Executive Officers

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As of the Revolution Medicines record date, Revolution Medicines directors and executive officers, and their affiliates, as a group, owned and were entitled to vote 6,032,019 shares of Revolution Medicines common stock, or approximately 5.5% of the total outstanding shares of Revolution Medicines common stock. Certain directors, executive officers and significant stockholders of Revolution Medicines have entered into voting agreements obligating them to vote their shares “FOR” the Revolution Medicines share issuance proposal and “FOR” the Revolution Medicines adjournment proposal. See also the sections titled “The Ancillary Agreements—Revolution Medicines Voting Agreements” and “Certain Beneficial Owners of Revolution Medicines Common Stock” of this joint proxy statement/prospectus.

Methods of Voting

If you are a stockholder of record as of the Revolution Medicines record date, you may vote by proxy through the Internet, by telephone, or by mail, or by voting electronically at the Revolution Medicines special meeting. For shares held through a bank, broker or other nominee in “street name” instead of as a registered holder, you may vote by submitting your voting instructions to your bank, broker or other nominee. In most instances, you will be able to do this over the Internet, by telephone or by mail as indicated below. Please refer to the information from your bank, broker or other nominee on how to submit voting instructions. If you do not provide voting instructions to your bank, broker or other nominee, your shares of Revolution Medicines common stock will not be voted on the Revolution Medicines share issuance proposal or the Revolution Medicines adjournment proposal as your bank, broker or other nominee does not have discretionary authority to vote on such proposals at the Revolution Medicines special meeting; see the section titled “—Quorum; Abstentions and Broker Non-Votes” of this joint proxy statement/prospectus.

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Registered stockholders who attend the Revolution Medicines special meeting may vote their shares live electronically even if they previously have voted their shares.

If you are a stockholder of record, proxies submitted over the Internet, by telephone or by mail as described above should be received by 11:59 p.m., Eastern Time, on November 7, 2023. To reduce administrative costs and help the environment by conserving natural resources, Revolution Medicines asks that you submit a proxy to vote through the Internet, which is available 24 hours a day.

Notwithstanding the above, if your shares are held in “street name” by a bank, broker or other nominee, you should follow the instructions you receive from your bank, broker or other nominee on how to vote your shares.

If you deliver a proxy pursuant to this joint proxy statement/prospectus, but do not specify a choice with respect to any proposal set forth in this joint proxy statement/prospectus, your underlying shares of Revolution Medicines common stock will be voted on such uninstructed proposal in accordance with the recommendation of the Revolution Medicines board of directors. No matters other than the proposals listed above will be brought before the Revolution Medicines special meeting and the Revolution Medicines bylaws provide that the only business that may be conducted at the Revolution Medicines special meeting are those proposals brought before the meeting pursuant to this joint proxy statement/prospectus.

Revocability of Proxies

Any stockholder giving a proxy has the right to revoke it before the proxy is voted at the Revolution Medicines special meeting by doing any of the following:

Execution or revocation of a proxy will not in any way affect the stockholder’s right to attend the Revolution Medicines special meeting and vote live electronically at the Revolution Medicines special meeting.

Written notices of revocation and other communications with respect to the revocation of proxies should be addressed to:

Revolution Medicines, Inc.

Attn: Secretary

700 Saginaw Drive

Redwood City, California 94063

If your shares are held in “street name” and you previously provided voting instructions to your broker, bank or other nominee, you should follow the instructions provided by your broker, bank or other nominee to revoke or change your voting instructions.

Proxy Solicitation Costs

Revolution Medicines is soliciting proxies to provide an opportunity to all Revolution Medicines stockholders to vote on agenda items, whether or not the stockholders are able to attend the Revolution Medicines special

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meeting or an adjournment or postponement thereof. Revolution Medicines will bear the cost of soliciting proxies from its stockholders. In addition to the solicitation of proxies by mail, Revolution Medicines will ask banks, brokers and other custodians, nominees and fiduciaries to forward the proxy solicitation materials to the beneficial owners of shares of Revolution Medicines common stock held of record by such nominee holders. Revolution Medicines may be required to reimburse these nominee holders for their customary clerical and mailing expenses incurred in forwarding the proxy solicitation materials to the beneficial owners.

Revolution Medicines has retained Morrow to assist in the solicitation process. Revolution Medicines estimates that it will pay Morrow a fee of approximately $15,000, plus reimbursement of reasonable expenses. Revolution Medicines also has agreed to indemnify Morrow against various liabilities and expenses that relate to or arise out of its solicitation of proxies (subject to certain exceptions). Proxies may be solicited on behalf of Revolution Medicines or by Revolution Medicines directors, officers and other employees by mail, telephone, electronic means (including by facsimile, via the Internet or by other means of electronic communication) or in person. Directors, officers and employees of Revolution Medicines will not be paid any additional amounts for their services or solicitation in this regard.

Attending the Revolution Medicines Special Meeting

You are entitled to attend the Revolution Medicines special meeting only if you are a stockholder of record of Revolution Medicines at the close of business on September 26, 2023 (the record date for the Revolution Medicines special meeting) or you hold your shares of Revolution Medicines beneficially in the name of a broker, bank or other nominee as of the Revolution Medicines record date, or you hold a valid proxy for the Revolution Medicines special meeting.

To participate in the Revolution Medicines special meeting, you will need the 16-digit control number included on your proxy card or on the voting instruction form that accompanied your proxy materials. The meeting webcast will begin promptly at 8:00 a.m., Pacific Time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 7:45 a.m., Pacific Time, and you should allow ample time for check-in procedures. If you hold your shares through a bank or broker, instructions should also be provided on the voting instruction form provided by your bank or brokerage firm. If you lose your 16-digit control number, you may join the Revolution Medicines special meeting as a “Guest,” but you will not be able to vote, ask questions, or access the list of stockholders as of the Revolution Medicines record date.

If you plan to attend the Revolution Medicines special meeting and vote electronically, Revolution Medicines still encourages you to submit a proxy to vote in advance by the Internet, by telephone or (if you received a paper copy of the proxy materials) by mail so that your vote will be counted even if you later decide not to attend the Revolution Medicines special meeting. Submitting your proxy by the Internet, by telephone or by mail will not limit your right to vote at the Revolution Medicines special meeting if you later decide to attend electronically.

Householding

The SEC’s rules permit us to deliver a single set of proxy materials to one address shared by two or more of our stockholders. This delivery method is referred to as “householding” and can result in significant cost savings. To take advantage of this opportunity, we have delivered only one set of proxy materials to multiple stockholders who share an address, unless we received contrary instructions from the impacted stockholders prior to the mailing date. We agree to deliver promptly, upon written or oral request, a separate set of proxy materials, as requested, to any stockholder at the shared address to which a single set of those documents was delivered. If you prefer to receive separate copies of the proxy materials, contact Revolution Medicines’ Secretary at 700 Saginaw Drive, Redwood City, California 94063, (650) 481-6801.

If you are currently a stockholder sharing an address with another stockholder and wish to receive only one set of future proxy materials for your household, please contact Revolution Medicines’ Secretary at the above address or phone number.

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Tabulation of Votes

The Revolution Medicines board of directors will appoint an independent inspector of election for the Revolution Medicines special meeting. The inspector of election will, among other matters, determine the number of shares of Revolution Medicines common stock represented electronically or by proxy at the Revolution Medicines special meeting to confirm the existence of a quorum, determine the validity of all proxies and ballots and certify the results of voting on all proposals submitted to Revolution Medicines stockholders.

Adjournments

If a quorum is present at the Revolution Medicines special meeting but there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal, then Revolution Medicines stockholders may be asked to vote on the Revolution Medicines adjournment proposal.

At any subsequent reconvening of the Revolution Medicines special meeting at which a quorum is present, any business may be transacted that might have been transacted at the original meeting and all proxies will be voted in the same manner as they would have been voted at the original convening of the Revolution Medicines special meeting, except for any proxies that have been effectively revoked or withdrawn prior to the time the proxy is voted at the reconvened meeting or in the event that a new record date has been fixed for the meeting.

No Appraisal Rights

Appraisal rights are statutory rights that, if applicable under law, enable stockholders of a corporation to dissent from an extraordinary transaction, such as a merger, and to demand that such corporation pay the fair value for their shares as determined by a court in a judicial proceeding instead of receiving the consideration offered to such stockholders in connection with the transaction. Under the DGCL, stockholders generally do not have appraisal rights if the shares of stock they hold are either listed on a national securities exchange or held of record by more than 2,000 holders. Notwithstanding the foregoing, appraisal rights are available if stockholders are required by the terms of the merger agreement to accept for their shares anything other than (a) shares of stock of the surviving corporation, (b) shares of stock of another corporation that will either be listed on a national securities exchange or held of record by more than 2,000 holders, (c) cash in lieu of fractional shares or (d) any combination of the foregoing.

Because Revolution Medicines common stock is listed on Nasdaq Select, a national securities exchange, and because EQRx stockholders are not required by the terms of the merger agreement to accept for their shares of EQRx common stock anything other than shares of Revolution Medicines common stock and cash in lieu of fractional shares, holders of EQRx common stock are not entitled to appraisal rights in connection with the mergers.

Assistance

If you need assistance voting or in completing your proxy card or have questions regarding the Revolution Medicines special meeting or the mergers, please contact Morrow, the proxy solicitor for Revolution Medicines:

Morrow Sodali LLC

509 Madison Avenue

12^th Floor

New York, New York 10022

Email: RVMD@info.morrowsodali.com

REVOLUTION MEDICINES STOCKHOLDERS SHOULD CAREFULLY READ THIS JOINT PROXY STATEMENT/PROSPECTUS IN ITS ENTIRETY FOR MORE DETAILED INFORMATION CONCERNING THE MERGER AGREEMENT AND THE MERGERS. IN PARTICULAR, REVOLUTION MEDICINES STOCKHOLDERS ARE DIRECTED TO THE MERGER AGREEMENT, WHICH IS ATTACHED AS ANNEX A HERETO.

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REVOLUTION MEDICINES PROPOSAL #1: REVOLUTION MEDICINES SHARE ISSUANCE PROPOSAL

This joint proxy statement/prospectus is being furnished to you as a stockholder of Revolution Medicines as part of the solicitation of proxies by the Revolution Medicines board of directors for use at the Revolution Medicines special meeting to consider and vote upon a proposal to approve the issuance of shares of Revolution Medicines common stock in the mergers pursuant to the merger agreement, which is attached as Annex A to this joint proxy statement/prospectus.

The Revolution Medicines board of directors, after due and careful discussion and consideration, adopted and approved the merger agreement and the consummation of the transactions upon the terms and conditions set forth in the merger agreement, including the issuance of Revolution Medicines common stock, and determined that the terms of the merger agreement, the mergers and the other transactions, including the issuance of Revolution Medicines common stock, are fair to, and in the best interests of, Revolution Medicines and its stockholders.

It is a condition to the completion of the mergers that Revolution Medicines stockholders approve the issuance of shares of Revolution Medicines common stock (including all securities convertible into or exercisable for shares of Revolution Medicines common stock) in the mergers. In the mergers, each EQRx stockholder will receive, for each eligible share of EQRx common stock that is issued and outstanding as of immediately prior to the effective time of the mergers, such number of shares of Revolution Medicines common stock equal to the exchange ratio, as further described in the sections titled “The Mergers—Merger Consideration” and “The Merger Agreement—Merger Consideration.”

Under Nasdaq rules, a company is required to obtain stockholder approval prior to the issuance of shares of common stock if the number of shares of common stock to be issued is, or will be upon issuance, equal to or in excess of 20% of the number of shares of common stock outstanding before the issuance of the shares of common stock. If the mergers are completed pursuant to the merger agreement, Revolution Medicines expects to issue 36,259,323 shares of Revolution Medicines common stock (excluding warrants and earn-out shares) in connection with the mergers based on the number of shares of EQRx common stock outstanding as of September 15, 2023, the latest practicable date prior to the date of this joint proxy statement/prospectus, and assuming that the exchange ratio is 0.0734, as determined by assuming a pre-EQRx special meeting VWAP of $32.1132, which reflects the five-day volume weighted average closing price per share of Revolution Medicines common stock calculated for the five trading days ending on and including September 15, 2023 (the actual number of shares of Revolution Medicines common stock issued in connection with the mergers may be higher or lower than this illustrative amount). Accordingly, the aggregate number of shares of Revolution Medicines common stock that Revolution Medicines will issue in the mergers will exceed 20% of the shares of Revolution Medicines common stock outstanding before such issuance, and for this reason, Revolution Medicines is seeking the approval of Revolution Medicines stockholders for the issuance of shares of Revolution Medicines common stock pursuant to the merger agreement. In the event the Revolution Medicines share issuance proposal is not approved by Revolution Medicines stockholders, the mergers will not be completed.

In the event the Revolution Medicines share issuance proposal is approved by Revolution Medicines stockholders, but the merger agreement is terminated (without the mergers being completed) prior to the issuance of shares of Revolution Medicines common stock pursuant to the merger agreement, Revolution Medicines will not issue any shares of Revolution Medicines common stock as a result of the approval of the Revolution Medicines share issuance proposal.

The Revolution Medicines board of directors accordingly recommends that Revolution Medicines stockholders approve the Revolution Medicines share issuance proposal.

Assuming a quorum is present at the Revolution Medicines special meeting, approval of the Revolution Medicines share issuance proposal requires the affirmative vote of the holders of a majority in voting power of

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the votes cast (excluding abstentions and broker non-votes) at the Revolution Medicines special meeting on the Revolution Medicines share issuance proposal. An abstention, a broker non-vote or the failure of a Revolution Medicines stockholder not present at the meeting to vote will have no effect on the outcome of the Revolution Medicines share issuance proposal.

IF YOU ARE A REVOLUTION MEDICINES STOCKHOLDER, THE REVOLUTION MEDICINES BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “FOR” THE SHARE ISSUANCE PROPOSAL (REVOLUTION MEDICINES PROPOSAL #1)

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REVOLUTION MEDICINES PROPOSAL #2: REVOLUTION MEDICINES ADJOURNMENT PROPOSAL

The Revolution Medicines special meeting may be adjourned to another time and place if necessary to permit solicitation of additional proxies if there are not sufficient votes to approve the Revolution Medicines share issuance proposal.

Revolution Medicines is asking its stockholders to authorize the holder of any proxy solicited by the Revolution Medicines board of directors to vote in favor of any adjournment of the Revolution Medicines special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the Revolution Medicines special meeting to approve the Revolution Medicines share issuance proposal. The vote on the Revolution Medicines adjournment proposal is a vote separate and apart from the vote to Revolution Medicines share issuance proposal. Revolution Medicines does not intend to call a vote on this proposal if the Revolution Medicines share issuance proposal is approved at the Revolution Medicines meeting.

The Revolution Medicines board of directors recommends that Revolution Medicines stockholders approve the proposal to adjourn the Revolution Medicines special meeting, if necessary.

Assuming a quorum is present at the Revolution Medicines special meeting, approval of the Revolution Medicines adjournment proposal requires the affirmative vote of the holders of a majority in voting power of the votes cast (excluding abstentions and broker non-votes) at the Revolution Medicines special meeting on the Revolution Medicines adjournment proposal. An abstention, a broker non-vote or the failure of a Revolution Medicines stockholder not present at the meeting to vote will have no effect on the outcome of the Revolution Medicines adjournment proposal.

IF YOU ARE A REVOLUTION MEDICINES STOCKHOLDER, THE REVOLUTION MEDICINES BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “FOR” THE REVOLUTION MEDICINES ADJOURNMENT PROPOSAL (REVOLUTION MEDICINES PROPOSAL #2)

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THE EQRx SPECIAL MEETING

This joint proxy statement/prospectus is being mailed on or about September 29, 2023 to holders of record of EQRx common stock as of the close of business on September 26, 2023 and constitutes notice of the EQRx special meeting in conformity with the requirements of the DGCL and the amended and restated by-laws of EQRx, which are referred to as the EQRx by-laws.

This joint proxy statement/prospectus is being provided to EQRx stockholders as part of a solicitation of proxies by the EQRx board of directors for use at the EQRx special meeting and at any adjournments or postponements of the EQRx special meeting. EQRx stockholders are encouraged to read the entire document carefully, including the annexes to and documents incorporated by reference into this document, for more detailed information regarding the merger agreement and the transactions contemplated by the merger agreement.

Date, Time and Place of the EQRx Special Meeting

The EQRx special meeting is scheduled to be held completely virtually at the EQRx special meeting website, at www.virtualshareholdermeeting.com/EQRX2023SM, on November 8, 2023, beginning at 11:00 a.m., Eastern Time, unless adjourned or postponed to a later date and/or time.

Matters to be Considered at the EQRx Special Meeting

The purposes of the EQRx special meeting are as follows, each as further described in this joint proxy statement/prospectus:

Recommendation of the EQRx Board of Directors

The EQRx board of directors recommends that EQRx stockholders vote:

After careful consideration, the EQRx board of directors (1) determined that the transactions contemplated by the merger agreement, including the mergers, is advisable and fair to, and in the best interests of EQRx and its stockholders, (2) approved and declared advisable the merger agreement and the transactions contemplated by the merger agreement, and (3) resolved to recommend the adoption of the merger agreement by EQRx stockholders.

See also the section titled “The Mergers—Recommendation of the EQRx Board of Directors; EQRx’s Reasons for the Mergers” of this joint proxy statement/prospectus.

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Record Date for the EQRx Special Meeting and Voting Rights

The record date to determine who is entitled to receive notice of and to vote at the EQRx special meeting is September 26, 2023. As of the close of business on the EQRx record date, there were 537,575,811 shares of EQRx common stock issued and outstanding, each entitled to vote at the EQRx special meeting. Each EQRx stockholder will have one vote for each matter brought before the EQRx special meeting for each share of EQRx common stock such holder held at the close of business on the EQRx record date. Only EQRx stockholders of record at the close of business on the EQRx record date are entitled to receive notice of and to vote at the EQRx special meeting.

Quorum; Abstentions and Broker Non-Votes

A quorum of stockholders is necessary to conduct the EQRx special meeting. A quorum will be present if stockholders holding at least a majority of the outstanding shares of EQRx common stock as of September 26, 2023, the EQRx record date, are present at the EQRx special meeting or represented by proxy. On the EQRx record date, there were 537,575,811 shares of EQRx common stock outstanding and entitled to vote. Thus, the holders of 268,787,906 shares must be present or represented by proxy at the EQRx special meeting to establish a quorum. Your shares will be counted towards the quorum only if you submit a valid proxy (or one is submitted on your behalf by your broker, bank or other nominee) or if you virtually attend the EQRx special meeting. Abstentions and broker non-votes will be counted towards the quorum requirement. If a quorum is not present, the EQRx special meeting will be adjourned or postponed until the holders of the number of shares of EQRx common stock required to constitute a quorum are present.

If your shares are held by your bank or broker as your nominee (that is, in “street name”), you will need to obtain a voting instruction form from the institution that holds your shares and follow the instructions included on that form regarding how to instruct your broker to vote your shares. If you do not give instructions to your broker, your broker can vote your shares with respect to “discretionary” items, but not with respect to “non-discretionary” items. Discretionary items are proposals considered routine under applicable rules on which your broker may vote shares held in street name without your voting instructions. On non-discretionary items for which you do not give your broker instructions, the shares will be treated as broker non-votes. All of the proposals at the EQRx special meeting are “non-discretionary” and, therefore, if you hold your shares through a broker, nominee, fiduciary or other custodian, your shares will not be voted on those proposals unless you provide voting instructions to your bank, broker or other nominee. It is therefore critical that you cast your vote by instructing your bank, broker or other nominee on how to vote.

If you submit a properly executed proxy card, even if you abstain from voting or vote against any or all of the proposals at the EQRx special meeting, your shares of EQRx common stock will be counted as present for purposes of determining whether a quorum is present at the EQRx special meeting. Executed but unvoted proxies will be voted in accordance with the recommendations of the EQRx board of directors. If additional votes must be solicited to adopt the EQRx merger agreement proposal, it is expected that the meeting will be adjourned to solicit additional proxies.

Required Votes; Vote of EQRx’s Directors and Executive Officers

The required votes for each of the proposals to be presented at the EQRx special meeting are summarized below:

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As of the EQRx record date, EQRx directors and executive officers, and their affiliates, as a group, owned and were entitled to vote 34,560,879 shares of EQRx common stock, or approximately 6.4% of the total outstanding shares of EQRx common stock. Certain directors, executive officers and significant stockholders of EQRx have entered into voting agreements obligating them to vote their shares “FOR” the EQRx merger agreement proposal and “FOR” the EQRx adjournment proposal. See also the sections titled “The Ancillary Agreements—EQRx Voting Agreements” and “Certain Beneficial Owners of EQRx Common Stock” of this joint proxy statement/prospectus.

Methods of Voting

If you are a stockholder of record as of the EQRx record date, you may vote by proxy through the Internet, by telephone or by mail, or by voting live electronically at the EQRx special meeting. For shares held through a bank, broker or other nominee in “street name” instead of as a registered holder, you may vote by submitting your voting instructions to your bank, broker or other nominee. Please refer to the information from your bank, broker or other nominee on how to submit voting instructions. If you do not provide voting instructions to your bank, broker or other nominee, your shares of EQRx common stock will not be voted on any proposal as your bank, broker or other nominee does not have discretionary authority to vote on such proposals at the EQRx special meeting; see the section titled “—Quorum; Abstentions and Broker Non-Votes” of this joint proxy statement/prospectus.

Even if you plan to attend the EQRx special meeting, we recommend that you also submit your proxy or voting instructions by Internet, telephone or mail so that your vote will be counted if you later decide not to attend the EQRx special meeting. Registered stockholders who attend the EQRx special meeting may vote their shares live electronically even if they previously have voted their shares. If you are a stockholder of record, proxies submitted

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over the Internet, by telephone or by mail as described above should be received by 11:59 p.m., Eastern Time, on November 7, 2023. To reduce administrative costs and help the environment by conserving natural resources, EQRx asks that you submit a proxy to vote through the Internet, which is available 24 hours a day.

Notwithstanding the above, if your shares are held in “street name” by a bank, broker or other nominee, you should follow the instructions you receive from your bank, broker or other nominee on how to vote your shares.

If you deliver a proxy pursuant to this joint proxy statement/prospectus, but do not specify a choice with respect to any proposal set forth in this joint proxy statement/prospectus, your underlying shares of EQRx common stock will be voted on such uninstructed proposal in accordance with the recommendation of the EQRx board of directors. No matters other than the proposals listed above will be brought before the EQRx special meeting and the EQRx by-laws provide that the only business that may be conducted at the EQRx special meeting are those proposals brought before the meeting pursuant to this joint proxy statement/prospectus.

Revocability of Proxies

Any EQRx stockholder giving a proxy has the right to revoke it before the proxy is voted at the EQRx special meeting by doing any of the following:

Execution or revocation of a proxy will not in any way affect the stockholder’s right to attend the EQRx special meeting and vote electronically at the EQRx special meeting.

Written notices of revocation and other communications with respect to the revocation of proxies should be addressed to:

EQRx, Inc.

Attn: Corporate Secretary

50 Hampshire Street

Cambridge, Massachusetts 02139

If your shares are held in “street name” and you previously provided voting instructions to your broker, bank or other nominee, you should follow the instructions provided by your broker, bank or other nominee to revoke or change your voting instructions.

Proxy Solicitation Costs

EQRx is soliciting proxies to provide an opportunity to all EQRx stockholders to vote on agenda items, whether or not the stockholders are able to attend the EQRx special meeting or an adjournment or postponement thereof. EQRx will bear the cost of soliciting proxies from its stockholders. In addition to the solicitation of proxies by mail, EQRx will ask banks, brokers and other custodians, nominees and fiduciaries to forward the proxy solicitation materials to the beneficial owners of shares of EQRx common stock held of record by such nominee holders. EQRx may be required to reimburse these nominee holders for their customary clerical and mailing expenses incurred in forwarding the proxy solicitation materials to the beneficial owners.

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EQRx has retained MacKenzie Partners to assist in the solicitation of proxies for the EQRx special meeting for a fee of $9,500, plus the reimbursement of out-of-pocket expenses. EQRx has agreed to indemnify MacKenzie Partners against various liabilities and expenses that relate to or arise out of its solicitation of proxies (subject to certain exceptions). Proxies may be solicited on behalf of EQRx or by EQRx directors, officers and other employees by telephone, mail, electronic means (including by facsimile, via the Internet or by other means of electronic communication) or in person. Directors, officers and employees of EQRx will not be paid any additional amounts for their services or solicitation in this regard.

Attending the EQRx Special Meeting

You are entitled to attend the EQRx special meeting only if you are a stockholder of record of EQRx at the close of business on September 26, 2023 (the record date for the EQRx special meeting) or you hold your shares of EQRx beneficially in the name of a broker, bank or other nominee as of the EQRx record date, or you hold a valid proxy for the EQRx special meeting.

If you are a stockholder of record of EQRx at the close of business on September 26, 2023 and wish to attend the EQRx special meeting electronically, please so indicate on the appropriate proxy card or as prompted by the Internet system. Your name will be verified against the list of stockholders of record prior to your being admitted to the EQRx special meeting.

To participate in the EQRx special meeting, you will need the 16-digit control number included on your proxy card or on the voting instruction form that accompanied your proxy materials. The meeting webcast will begin promptly at 11:00 a.m., Eastern Time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 10:45 a.m., Eastern Time, and you should allow ample time for check-in procedures. If you hold your shares through a bank or broker, instructions should also be provided on the voting instruction form provided by your bank or brokerage firm.

If you plan to attend the EQRx special meeting and vote electronically, EQRx still encourages you to submit a proxy to vote in advance by the Internet, by telephone or (if you received a paper copy of the proxy materials) by mail so that your vote will be counted even if you later decide not to attend the EQRx special meeting. Submitting your proxy by the Internet, by telephone or by mail will not limit your right to vote at the EQRx special meeting if you later decide to attend virtually.

Householding

If you reside at the same address as another EQRx stockholder, you and other EQRx stockholders residing at the same address may receive a single copy of the proxy materials. This process, which has been approved by the SEC, is called “householding.” Once you receive notice from your broker or other nominee record holder that it will be “householding” the proxy materials, the practice will continue until you are otherwise notified or until you notify them that you no longer want to participate in the practice. Stockholders who participate in householding will continue to have access to and utilize separate proxy voting instructions.

If you wish to receive a separate copy of the proxy materials, you may do so by making a written or oral request to: EQRx, Inc., 50 Hampshire Street, Cambridge, Massachusetts, 02139, Attention: Corporate Secretary, telephone: (617) 315-2255. Upon your request, we will promptly deliver a separate copy to you. If you want to receive your own set of the proxy materials in the future, or if you share an address with another stockholder and together both of you would like to receive only a single set of proxy materials, you should contact your broker or other nominee record holder directly or you may contact us at the above address and phone number.

Tabulation of Votes

The EQRx board of directors will appoint an independent inspector of election for the EQRx special meeting. The inspector of election will, among other matters, determine the number of shares of EQRx common

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stock represented electronically or by proxy at the EQRx special meeting to confirm the existence of a quorum, determine the validity of all proxies and ballots and certify the results of voting on all proposals submitted to EQRx stockholders.

Adjournments

If a quorum is present at the EQRx special meeting but there are not sufficient votes at the time of the EQRx special meeting to approve the merger agreement proposal, then EQRx stockholders may be asked to vote on the EQRx adjournment proposal.

Pursuant to the EQRx by-laws, the EQRx board of directors may postpone and reschedule any previously scheduled special meeting of stockholders and any record date with respect to such meeting, regardless of whether any notice or public disclosure with respect to any such meeting has been sent or made. Whether or not a quorum is present, the presiding officer of the EQRx special meeting also has the power to adjourn such EQRx special meeting from time to time if (i) no quorum is present for the transaction of business, (ii) the adjournment is necessary or appropriate to enable the stockholders to consider fully information which the EQRx board of directors determines has not been made sufficiently or timely available to stockholders, or (iii) the EQRx board of directors determines that adjournment is otherwise in the best interests of EQRx. When any meeting is adjourned to another hour, date or place, notice need not be given of the adjourned meeting other than an announcement at the meeting at which the adjournment is taken of the hour, date and place, if any, to which the meeting is adjourned and the means of remote communications, if any, by which stockholders and proxyholders may be deemed to be present in person and vote at such adjourned meeting. However, if the adjournment is for more than 30 days from the meeting date, or if after the adjournment a new record date is fixed for the adjourned meeting, notice of the adjourned meeting and the means of remote communications, if any, by which stockholders and proxyholders may be deemed to be present in person and vote at such adjourned meeting shall be given to each stockholder of record entitled to vote at such meeting and receive such notice.

At any subsequent reconvening of the EQRx special meeting at which a quorum is present, any business may be transacted that might have been transacted at the original meeting and all proxies will be voted in the same manner as they would have been voted at the original convening of the EQRx special meeting, except for any proxies that have been effectively revoked or withdrawn prior to the time the proxy is voted at the reconvened meeting or in the event that a new record date has been fixed for the meeting.

Appraisal Rights

Appraisal rights are statutory rights that, if applicable under law, enable stockholders of a corporation to dissent from an extraordinary transaction, such as a merger, and to demand that such corporation pay the fair value for their shares as determined by a court in a judicial proceeding instead of receiving the consideration offered to such stockholders in connection with the transaction. Under the DGCL, stockholders do not have appraisal rights if the shares of stock they hold are either listed on a national securities exchange or held of record by more than 2,000 holders. Notwithstanding the foregoing, appraisal rights are available if stockholders are required by the terms of the merger agreement to accept for their shares anything other than (a) shares of stock of the surviving corporation, (b) shares of stock of another corporation that will either be listed on a national securities exchange or held of record by more than 2,000 holders, (c) cash in lieu of fractional shares or (d) any combination of the foregoing.

Because Revolution Medicines common stock is listed on Nasdaq Select, a national securities exchange, and because EQRx stockholders are not required by the terms of the merger agreement to accept for their shares of EQRx common stock anything other than shares of Revolution Medicines common stock and cash in lieu of fractional shares, holders of EQRx common stock are not entitled to appraisal rights in the mergers.

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Assistance

If you need assistance voting or in completing your proxy card or have questions regarding the EQRx special meeting or the mergers, please contact MacKenzie Partners, the proxy solicitor for EQRx:

MacKenzie Partners, Inc.

1407 Broadway, 27^th Floor

New York, New York 10018

Email: proxy@mackenziepartners.com

Call Toll-Free: 1-800-322-2885

EQRx STOCKHOLDERS SHOULD CAREFULLY READ THIS JOINT PROXY STATEMENT/PROSPECTUS IN ITS ENTIRETY FOR MORE DETAILED INFORMATION CONCERNING THE MERGER AGREEMENT AND THE MERGERS. IN PARTICULAR, EQRx STOCKHOLDERS ARE DIRECTED TO THE MERGER AGREEMENT, WHICH IS ATTACHED AS ANNEX A HERETO.

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EQRx PROPOSAL #1: EQRx MERGER AGREEMENT PROPOSAL

This joint proxy statement/prospectus is being furnished to you as an EQRx stockholder in connection with the solicitation of proxies by the EQRx board of directors for use at the EQRx special meeting. At the EQRx special meeting, EQRx is asking EQRx stockholders to consider and vote upon a proposal to adopt the merger agreement, which is attached as Annex A to this joint proxy statement/prospectus, pursuant to which (i) Merger Sub I will merge with and into EQRx, which transaction is referred to as the first merger, with EQRx as the surviving corporation of the first merger and (ii) as soon as practicable after the first merger and as the second step in a single integrated transaction with the first merger, EQRx will merge with and into Merger Sub II, with Merger Sub II as the surviving company and a wholly owned subsidiary of Revolution Medicines. Upon completion of the first merger, each share of EQRx common stock issued and outstanding immediately prior to the effective time (other than excluded EQRx shares) will be converted into the right to receive the merger consideration described in this joint proxy statement/prospectus. EQRx stockholders will receive cash in lieu of any fractional shares as part of the merger consideration, as specified in the merger agreement.

The EQRx board of directors, after careful consideration, (i) determined that the mergers is advisable and fair to, and in the best interests of, EQRx and its stockholders, (ii) approved and declared advisable the merger agreement and the transactions contemplated by the merger agreement, and (iii) resolved to recommend the adoption of the merger agreement by EQRx stockholders.

The mergers and a summary of the terms of the merger agreement are described in more detail in this joint proxy statement/prospectus under “The Mergers” and “The Merger Agreement,” and EQRx stockholders are encouraged to read the full text of the merger agreement, which is attached as Annex A hereto.

It is a condition to the completion of the mergers that EQRx stockholders approve the EQRx merger agreement proposal. The EQRx board of directors accordingly recommends that EQRx stockholders vote to approve the EQRx merger agreement proposal.

Assuming a quorum is present at the EQRx special meeting, the approval of the merger agreement proposal by EQRx stockholders requires the affirmative vote of the holders of a majority of the outstanding shares of EQRx common stock entitled to vote at the EQRx special meeting. An abstention, a broker non-vote or the failure of an EQRx stockholder to vote (including the failure of an EQRx stockholder who holds shares in “street name” through a bank, broker or other nominee to give voting instructions to that bank, broker or other nominee) will have the same effect as a vote cast “AGAINST” the proposal to adopt the merger agreement.

IF YOU ARE AN EQRx STOCKHOLDER, THE EQRx BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “FOR” THE MERGER AGREEMENT PROPOSAL (EQRx PROPOSAL #1).

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EQRx PROPOSAL #2: EQRx COMPENSATION PROPOSAL

Pursuant to Section 14A of the Exchange Act and Rule 14a-21(c) thereunder, EQRx is required to submit to a non-binding, advisory stockholder vote certain compensation that may be paid or become payable to EQRx’s named executive officers that is based on or otherwise relates to the mergers as disclosed under “The Mergers—Interests of EQRx’s Directors and Executive Officers in the Mergers—Quantification of Payments and Benefits to EQRx Named Executive Officers.” The EQRx compensation proposal gives EQRx stockholders the opportunity to express their views on the merger-related compensation of EQRx’s named executive officers.

Accordingly, EQRx is asking EQRx stockholders to vote “FOR” the adoption of the following resolution, on a non-binding, advisory basis:

“RESOLVED, that the compensation that may be paid or become payable to EQRx’s named executive officers that is based on or otherwise relates to the mergers, as disclosed pursuant to Item 402(t) of Regulation S-K under the heading “The Mergers—Interests of EQRx’s Directors and Executive Officers in the Mergers—Quantification of Payments and Benefits to EQRx Named Executive Officers,” including the associated narrative discussion and the agreements, plans, arrangements or understandings pursuant to which such compensation may be paid or become payable, are hereby APPROVED.”

The vote on the EQRx compensation proposal is a vote separate and apart from the vote to adopt the merger agreement. Accordingly, if you are an EQRx stockholder, you may vote to approve the EQRx merger agreement proposal and vote not to approve the EQRx compensation proposal, and vice versa. The vote on the EQRx compensation proposal is advisory and non-binding. As a result, if the mergers are completed, the merger-related compensation may be paid to EQRx’s named executive officers to the extent payable in accordance with the terms of the compensation agreements and arrangements even if EQRx stockholders do not approve the EQRx compensation proposal.

The EQRx board of directors accordingly recommends that EQRx stockholders vote to approve the EQRx compensation proposal.

Assuming a quorum is present at the EQRx special meeting, approval of the EQRx compensation proposal requires the affirmative vote of the holders of a majority of the votes properly cast for and against the EQRx compensation proposal. An abstention, a broker non-vote or the failure of an EQRx stockholder to vote (including a failure to instruct your bank, broker or other nominee to vote) will have no effect on the outcome of the EQRx compensation proposal.

IF YOU ARE AN EQRx STOCKHOLDER, THE EQRx BOARD RECOMMENDS THAT YOU VOTE “FOR” THE EQRx COMPENSATION PROPOSAL (EQRx PROPOSAL #2).

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EQRx PROPOSAL #3: EQRX ADJOURNMENT PROPOSAL

The EQRx special meeting may be adjourned to another time and place if necessary to permit solicitation of additional proxies if there are not sufficient votes to approve the EQRx merger agreement proposal.

EQRx is asking its stockholders to authorize the holder of any proxy solicited by the EQRx board of directors to vote in favor of any adjournment of the EQRx special meeting to a later date or dates, if necessary or appropriate, to solicit additional proxies if there are not sufficient votes at the time of the EQRx special meeting to approve the EQRx merger agreement proposal. The vote on the EQRx adjournment proposal is a vote separate and apart from the vote to approve the EQRx merger agreement proposal. EQRx does not intend to call a vote on this proposal if the EQRx merger agreement proposal is approved at the EQRx special meeting.

The EQRx board of directors recommends that EQRx stockholders vote to approve the EQRx adjournment proposal.

Assuming a quorum is present at the EQRx special meeting, approval of the EQRx adjournment proposal requires the affirmative vote of the holders of a majority of the votes properly cast for and against the EQRx adjournment proposal. An abstention, a broker non-vote or the failure of an EQRx stockholder to vote (including the failure of an EQRx stockholder who holds shares in “street name” through a bank, broker or other nominee to give voting instructions to that bank, broker or other nominee) will have no effect on the outcome of the EQRx adjournment proposal.

IF YOU ARE AN EQRx STOCKHOLDER, THE EQRx BOARD OF DIRECTORS RECOMMENDS THAT YOU VOTE “FOR” THE EQRx ADJOURNMENT PROPOSAL (EQRx PROPOSAL #3).

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THE MERGERS

The following is a description of material aspects of the mergers. While Revolution Medicines and EQRx believe that the following description covers the material terms of the mergers, the description may not contain all of the information that is important to you. You are encouraged to read carefully this entire joint proxy statement/prospectus, including the text of the merger agreement attached to this joint proxy statement/prospectus as Annex A, for a more complete understanding of the mergers. In addition, important business and financial information about each of Revolution Medicines and EQRx is included in or incorporated by reference into this joint proxy statement/prospectus. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

General

Revolution Medicines, Inc., which is referred to as Revolution Medicines, EQRx, Inc., which is referred to as EQRx, Equinox Merger Sub I, Inc., a wholly owned subsidiary of Revolution Medicines, which is referred to as Merger Sub I, and Equinox Merger Sub II LLC, a wholly owned subsidiary of Revolution Medicines, which is referred to as Merger Sub II have entered into the Agreement and Plan of Merger, dated as of July 31, 2023 (as it may be amended from time to time), referred to herein as the merger agreement. Pursuant to the terms of the merger agreement, (i) Merger Sub I will merge with and into EQRx, referred to herein as the first merger, with EQRx as the surviving corporation, referred to herein as the first merger surviving corporation, in the first merger and continuing as a wholly owned subsidiary of Revolution Medicines and (ii) as soon as practicable after the first merger and as the second step in a single integrated transaction with the first merger, EQRx will merge with and into Merger Sub II, referred to herein as the second merger, with Merger Sub II as the surviving company, referred to herein as the surviving company, in the second merger and continuing as a wholly owned subsidiary of Revolution Medicines. The first merger and the second merger together are referred to as the mergers.

As a result of the first merger, the separate existence of Merger Sub I will cease and EQRx will continue its existence under the laws of the State of Delaware as the first merger surviving corporation and as a wholly owned subsidiary of Revolution Medicines. As a result of the second merger, the separate existence of EQRx will cease and Merger Sub II will continue its existence under the laws of the State of Delaware as the surviving company and as a wholly owned subsidiary of Revolution Medicines. Following consummation of the mergers, the surviving company’s name will be “EQRx, LLC.”

Merger Consideration

At the effective time, by virtue of the first merger and without any further action on the part of Revolution Medicines, Merger Sub I, EQRx, or any stockholder of EQRx or Merger Sub I, each share of EQRx common stock that is issued and outstanding immediately prior to the effective time (other than excluded EQRx shares) will be converted into the right to receive a number of validly issued, fully paid and non-assessable shares of Revolution Medicines common stock equal to the exchange ratio, which shares of Revolution Medicines common stock (in the aggregate) are referred to herein as the merger consideration. No fractional shares of Revolution Medicines common stock will be issued as merger consideration, and EQRx stockholders will receive cash in lieu of any fractional shares as part of the merger consideration, as specified in the merger agreement. At the effective time, all excluded EQRx shares will be cancelled and retired and will cease to exist, and no consideration will be delivered in exchange for such shares.

The exchange ratio will be determined by dividing (i) the aggregate number of shares of Revolution Medicines common stock to be issued as merger consideration by (ii) the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement.

The exchange ratio numerator (i.e., the aggregate number of shares of Revolution Medicines common stock to be issued as merger consideration) will equal the sum (rounded to the nearest whole share) of (i) 7,692,308

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shares of Revolution Medicines common stock, plus (ii) an additional number of shares of Revolution Medicines common stock, which will be determined prior to the EQRx special meeting by dividing (a) $870,000,000 by (b) (1) the pre-EQRx special meeting VWAP, multiplied by (2) 0.94.

The exchange ratio denominator (i.e., the number of shares of EQRx common stock outstanding immediately prior to the effective time, determined in accordance with the merger agreement) will:

The exchange ratio is floating, which means that it will change between now and the date of the EQRx special meeting, depending upon the pre-EQRx special meeting VWAP. The exchange ratio will be calculated promptly following the determination of the pre-EQRx special meeting VWAP, which will be known following the closing of the Nasdaq Select market on the sixth business day prior to the scheduled EQRx special meeting date as set forth in the notice of meeting included in the definitive form of this joint proxy statement/prospectus. EQRx and Revolution Medicines will publicly disclose the exchange ratio pursuant to a press release and/or the filing of Current Reports on Form 8-K with the SEC. See the section titled “Where You Can Find More Information” of this joint proxy statement/prospectus.

The market price of Revolution Medicines common stock has fluctuated since the date of the announcement of the merger agreement and may continue to fluctuate from the date of this joint proxy statement/prospectus to the date of the special meetings, the date the mergers are completed and thereafter. The market price of Revolution Medicines common stock, when received by EQRx equityholders after the mergers are completed, could be greater than, less than or the same as the market price of Revolution Medicines common stock on the date of this joint proxy statement/prospectus or at the time of the special meetings.

Accordingly, you should obtain current market quotations for Revolution Medicines common stock and EQRx common stock before deciding how to vote with respect to any of the proposals described in this joint proxy statement/prospectus. Revolution Medicines common stock is traded on the Nasdaq Select under the symbol “RVMD” and EQRx common stock is traded on the Nasdaq Global under the symbol “EQRX.”

Treatment of EQRx equity awards, EQRx warrants and the EQRx earn-out is described in the section titled “The Merger Agreement—Treatment of EQRx Equity Awards, EQRx Warrants and the EQRx Earn-Out” of this joint proxy statement/prospectus.

Completion and Effectiveness of the Mergers

The closing of the mergers, or the closing, will take place through the electronic exchange of required documentation as soon as reasonably practicable, and in no event later than two business days after the satisfaction or waiver of all conditions for completion of the mergers set forth in the merger agreement (other than those conditions that by their nature are to be satisfied at the closing, but subject to the satisfaction or waiver of each of such conditions), or at such other time, place and/or date as Revolution Medicines and EQRx may mutually agree in writing. The date on which the closing actually takes place is referred to herein as the closing date. Subject to the satisfaction or waiver of the conditions to the closing described in the section titled “The Merger Agreement—Conditions to the Completion of the Mergers” of this joint proxy statement/prospectus, including receipt of the required Revolution Medicines stockholder approval and the required EQRx stockholder

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approval, it is anticipated that the mergers will close in November 2023. However, neither Revolution Medicines nor EQRx can predict the actual date on which the mergers will be completed, or if the completion will occur at all, because completion is subject to conditions and factors outside the control of both companies. It is possible that factors outside the control of both companies could result in the mergers being completed at a different time, or not at all.

On the date of the closing, EQRx, Merger Sub I and Merger Sub II will, as applicable, file, with the Secretary of State of the State of Delaware as provided under the DGCL and the DLLCA, as applicable, (i) the certificate of merger relating to the first merger, which is referred to as the first certificate of merger, and (ii) as soon as practicable after the effective time, and in any case, on the same day as the effective time, the certificate of merger relating to the second merger, which is referred to as the second certificate of merger. The first merger will become effective at the time of the filing of the first certificate of merger with the Secretary of State of the State of Delaware or at such later time as may be designated jointly by Revolution Medicines and EQRx and specified in the first certificate of merger. The second merger will become effective at the time of the filing of the second certificate of merger with the Secretary of State of the State of Delaware or at such later time as may be designated jointly by Revolution Medicines and EQRx and specified in the second certificate of merger.

Background of the Mergers

The following chronology summarizes the key meetings and events that led to the signing of the merger agreement. The following chronology does not purport to catalogue every conversation among the EQRx board of directors, the Revolution Medicines board of directors, or respective committees thereof or the representatives of EQRx, Revolution Medicines and/or other parties.

In August 2019, EQRx, Inc. was incorporated in Delaware as a new type of pharmaceutical company committed to developing and delivering innovative medicines to patients at radically lower prices (this entity is referred to as Legacy EQRx). Legacy EQRx’s mission was to improve health for all with innovative and affordable medicines so that people with life-changing or chronic conditions could gain access to the medicines they need, physicians could treat patients without barriers to prescribing, and health systems could afford to make those medicines available, without restrictions, to the populations they serve in a financially sustainable manner. Launched in January 2020, Legacy EQRx’s “New Pharma” strategy focused on assembling a catalog of medicines at significant scale, targeting some of the most innovative clinical opportunities and highest drug cost categories, with an initial focus on oncology and immune-inflammatory diseases.

On August 5, 2021, Legacy EQRx entered into an Agreement and Plan of Merger with CM Life Sciences III Inc., referred to as CMLS III, a special purpose acquisition company, or SPAC, formed for the purpose of effecting a business combination with one or more businesses. Pursuant to this agreement, CMLS III agreed to acquire Legacy EQRx for aggregate consideration of approximately $4.2 billion, payable in the form of shares of common stock of CMLS III valued at $10.00 per share, including a $500 million earn-out based on EQRx’s post-closing share price performance, referred to as the EQRx earn-out shares. If the EQRx share price was greater than or equal to $12.50 at any time between the 12-month anniversary of the closing and the 36-month anniversary of the closing, 35 million EQRx earn-out shares could be earned, and if the EQRx share price was greater than or equal to $16.50, an additional 15 million EQRx earn-out shares could be earned. CMLS III also concurrently entered into subscription agreements with certain investors, referred to as the PIPE Investors, pursuant to which the PIPE Investors subscribed for shares of common stock of CMLS III at a price of $10.00 per share for aggregate gross proceeds of $1.2 billion, referred to as the PIPE Financing.

On December 17, 2021, Legacy EQRx completed the business combination with CMLS III, and CMLS III changed its name to EQRx, Inc. (the former name of Legacy EQRx). At the closing, (i) an aggregate of approximately 343 million shares of CMLS III common stock were issued in exchange for the shares of Legacy EQRx outstanding as of immediately prior to the closing and (ii) an aggregate of approximately 120 million shares of CMLS III common stock were issued to the PIPE Investors in the PIPE Financing. At the closing, each

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outstanding equity award of Legacy EQRx was assumed by CMLS III, and the EQRx earn-out shares were issued into escrow to be held pending the occurrence of the applicable triggering event(s) for release to the Legacy EQRx securityholders. Following the closing, all shares of CMLS III common stock were redesignated as common stock of EQRx, and each outstanding warrant of CMLS III (consisting of both public and private warrants) became exercisable for shares of common stock of EQRx.

Following completion of the business combination with CMLS III, EQRx continued to focus on oncology and immune-inflammatory diseases, with five clinical-stage programs, and several other preclinical and drug engineering programs. EQRx’s late-stage programs included (1) aumolertinib, a third-generation epidermal growth factor receptor (EGFR) inhibitor, which was in-licensed from Hansoh (Shanghai) Healthtech Co., LTD and Jiangsu Hansoh Pharmaceutical Group Company LTD in 2020, and (2) sugemalimab, an anti-programmed death-ligand 1 (PD-L1) antibody, which was in-licensed from CStone Pharmaceuticals in 2020. The other clinical-stage programs in EQRx’s pipeline included: (i) lerociclib, a novel, oral, potent, and selective small molecule cyclin-dependent kinase (CDK) 4/6 inhibitor being evaluated for the treatment of patients with metastatic breast cancer; (ii) nofazinlimab, an anti-programmed death-1 (PD-1) antibody being evaluated for the treatment of patients with primary liver cancer; and (iii) EQ121, a novel, highly selective janus kinase-1 (JAK-1) inhibitor being evaluated for the treatment of ankylosing spondylitis, atopic dermatitis, and rheumatoid arthritis. EQRx also pursued the assembly of a “Global Buyers Club” by entering into strategic partnerships with private and public payers, providers and health systems so they and the patients they serve could gain access to EQRx’s future medicines, if approved, at radically lower prices.

On a periodic basis, members of EQRx management met with representatives of the U.S. Food and Drug Administration, referred to as the FDA, regarding possible paths to approval for EQRx’s product candidates in the United States. In this regard, during the Fall of 2022, members of EQRx management had a number of discussions and other communications with representatives of the FDA to gain clarity on the regulatory paths forward for aumolertinib and sugemalimab. During these discussions, it became apparent that only the final overall survival results of a second Phase 3 trial comparing sugemalimab with approved PD(L)1 therapy with an OS endpoint in a representative, diverse U.S. population would support a U.S. New Drug Application, referred to as an NDA, for a Stage IV non-small cell lung cancer (NSCLC) indication, and that interim study readouts of such a trial would not be supportive of a NDA filing based on the existing GEMSTONE-302 study in China, which would materially impact the timing and associated costs for regulatory approval in the United States. In addition, based on these interactions with the FDA, EQRx believed that a potential U.S. regulatory filing for aumolertinib might not occur until 2027.

On October 24, 2022, the EQRx board of directors held a meeting at which members of senior management and a representative of EQRx’s outside counsel, Goodwin Procter LLP, referred to as Goodwin, were present. At this meeting, management provided the EQRx board of directors with an update on the development status and timelines for aumolertinib and sugemalimab, the recent interactions with the FDA regarding each program, the company’s cash spend and runway, and organizational growth matters. The meeting participants discussed the strategic implications of these matters, including the challenges in adapting EQRx’s initial commercial and pricing models, plans and strategies to accommodate the current U.S. regulatory environment, and the expected financial and operational impact. The EQRx board of directors also discussed the potential engagement of a financial advisor to assist in a review of strategic alternatives that might be available to EQRx.

On October 27, 2022, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goodwin were present. At this meeting, the EQRx board of directors continued its discussion of the strategic implications of the recent interactions with the FDA regarding aumolertinib and sugemalimab and the expected financial and operational impact on EQRx. The meeting participants also discussed undertaking a review of strategic alternatives that might be available to EQRx, and the representatives of Goodwin reviewed with the directors their fiduciary duties in that context. At the conclusion of this meeting, the EQRx board of directors directed management to identify a financial advisor to provide financial advisory services to EQRx in connection with this strategic review.

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On November 9, 2022, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, the representatives of Goldman Sachs reviewed certain strategic alternatives for EQRx, including (i) a potential sale of the company, (ii) a “merger of equals” transaction, (iii) a partnership/licensing transaction, and (iv) a “take-private” transaction. The representatives of Goldman Sachs then reviewed with the EQRx board of directors lists of (i) 20 parties that might be potentially interested in a strategic acquisition of the company, which included large global pharmaceutical companies, U.S. mid-cap, publicly-traded biopharmaceutical companies, Asian biopharmaceutical companies, and European biopharmaceutical companies, and (ii) four biopharmaceutical companies that might be potentially interested in a merger. Following discussion, the EQRx board of directors authorized representatives of Goldman Sachs and EQRx senior management, as appropriate, to contact the 24 parties discussed at the meeting to determine their potential interest in a strategic transaction with EQRx.

On November 10, 2022, EQRx issued a press release reporting its third quarter 2022 financial results and providing updates on its portfolio and U.S. commercial strategy. In the press release, EQRx indicated that, based on recent FDA feedback, EQRx had concluded that there was no commercially viable path for sugemalimab plus chemotherapy in Stage IV NSCLC in the United States, but EQRx would continue to pursue ex-U.S. approvals based on existing data. In addition, EQRx indicated that it intended to prioritize development of aumolertinib and lerociclib and adopt market-based pricing for these products in the United States only. The press release also noted that, based on recent interactions with the FDA, EQRx believed that results of the ongoing Phase 3b study comparing the combination of aumolertinib and chemotherapy versus either osimertinib or aumolertinib alone could potentially support the use of aumolertinib in combination with chemotherapy as a future standard of care and/or as a monotherapy for EGFR-mutated NSCLC. The press release further noted EQRx believed that an interim comparison of the monotherapy arms would not address the FDA’s applicability concerns, and thus EQRx did not anticipate a filing for a monotherapy indication prior to the final results of the study.

Commencing on November 14, 2022, at the direction of the EQRx board of directors, representatives of Goldman Sachs and EQRx senior management contacted the 24 parties discussed at the November 9^th meeting, plus an additional four parties subsequently identified by Goldman Sachs in consultation with EQRx management. While several of these parties expressed initial interest in engaging in discussions with EQRx, only two parties, referred to as Party A and Party B, subsequently entered into a confidentiality agreement with EQRx in order to facilitate discussions regarding a potential merger. None of the other parties expressed an interest in further exploring an acquisition of, or merger with, EQRx. The parties that declined to engage with EQRx on such a transaction cited one or more of the following reasons: (i) absence of clinical differentiation for EQRx’s product candidates; (ii) prioritization of other oncology targets or indications; (iii) focus on investment on novel mechanisms; (iv) resource constraints to effect a large acquisition; and/or (v) general lack of interest in a business combination with EQRx. Several of these parties, however, did express potential interest in specific assets of EQRx. In particular, EQRx senior management continued to engage in discussions with one of these parties, referred to as Party C, over several months with respect to a strategic partnering transaction with EQRx as described below. EQRx also continued to engage in further discussions with other parties regarding specific assets as part of its on-going business development activities. The EQRx board of directors utilized a previously-formed committee of independent directors from Legacy EQRx from time to time to engage with management and representatives of Goldman Sachs regarding the strategic process between EQRx board meetings for efficiency purposes.

On November 16, 2022, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, management reviewed the investor feedback from EQRx’s recent announcements, as well as certain business, portfolio, financial and operational updates. Management also led a review of the internal strategic options and related evaluations, including a portfolio build strategy, operational timelines and budget implications. Management also presented a preliminary 2023 annual operating plan, with a portfolio focus around aumolertinib and lerociclib, and resulting annual budget. In addition, the meeting participants discussed planned headcount management, related severance plan terms, and proposed changes to EQRx’s equity plan to implement the accelerated vesting of equity awards in connection with the termination of a holder’s employment under certain

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circumstances following a change in control of EQRx. The representatives of Goldman Sachs also provided an update on their outreach to parties as discussed at the November 9^th meeting of the EQRx board of directors.

On November 29, 2022, EQRx entered into a mutual confidentiality agreement with Party A to facilitate continuing discussions regarding a potential merger. The confidentiality agreement did not include a standstill provision. Thereafter, members of EQRx senior management had discussions with representatives of Party A regarding their respective company’s business, portfolio and operations. Following these initial discussions, Party A determined not to proceed due to other strategic priorities.

On December 10, 2022, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, management and representatives of Goldman Sachs discussed with the EQRx board of directors potential strategic alternatives, including (i) a potential sale of the company, (ii) a “merger of equals” transaction, (iii) a strategic acquisition of another company by EQRx, and (iv) an out-license of ex-U.S. rights to one or more of EQRx’s programs. In addition, the representatives of Goldman Sachs provided an update on their outreach regarding a potential acquisition of, or merger with, EQRx, and the status of discussions with the parties who had expressed initial interest. Given the limited interest elicited from the 28 parties contacted with respect to a potential acquisition of, or merger with, EQRx, the EQRx board of directors authorized management and Goldman Sachs to commence a new process to explore a potential out-license of ex-U.S. rights to one or more of EQRx’s programs.

Commencing shortly thereafter, at the direction of the EQRx board of directors, representatives of Goldman Sachs and EQRx senior management contacted a total of 18 publicly-traded and private biopharmaceutical companies regarding a potential out-license of ex-U.S. rights to one or more of EQRx’s programs. Five of these 18 parties had been previously contacted regarding a potential acquisition of EQRx. Of the 18 parties contacted, five of these parties expressed interest in entering into a confidentiality agreement with EQRx at that time to facilitate further discussions. Certain of these confidentiality agreements included a standstill provision that prohibited such counterparty, for an agreed-upon period from the date of the agreement, from offering to acquire or acquiring EQRx, and from taking certain other actions, including soliciting proxies, without the prior consent of EQRx. The confidentiality agreements that included a standstill provision allowed the counterparty to make confidential acquisition proposals to the EQRx board of directors at any time following public announcement of EQRx’s entry into a definitive agreement with a third party providing for a sale of EQRx and, in certain cases, included other “sunset” provisions on the standstill obligations. While discussions with a number of these parties continued for several months, EQRx did not receive any actionable proposals with respect to an ex-U.S. licensing transaction. The parties that declined to pursue such a licensing transaction with EQRx cited one or more of the following reasons: (i) concerns regarding clinical differentiation and competitive positioning; (ii) outside areas of core focus; (iii) lack of fit with strategic timeline goals; (iv) challenging regulatory environment; (v) uncertainties with respect to pricing and reimbursement; and/or (vi) limited financial capacity for business development.

On December 14, 2022, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, management and the representatives of Goldman Sachs provided an update on the ongoing strategic review process, including the status of discussions with the potential counterparties, feedback received, current timelines and potential next steps. The EQRx board of directors also discussed EQRx’s fiscal year 2022 performance and fiscal year 2023 planning matters.

On January 6, 2023, EQRx entered into a mutual confidentiality agreement with Party B to facilitate continuing discussions regarding a potential merger. The confidentiality agreement included a standstill provision applicable to Party B that terminated upon the public announcement by EQRx of its entry into a definitive agreement with a third party involving the acquisition of EQRx. Thereafter, members of EQRx senior management had discussions with representatives of Party B regarding their respective company’s business, portfolio and operations.

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On January 23, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, management and the representatives of Goldman Sachs provided an update regarding the status of discussions with potential counterparties, including the feedback received to date, current timelines and potential next steps. In executive session, the EQRx board of directors also discussed the engagement of Goldman Sachs as its financial advisor in connection with the review of strategic alternatives and potential strategic transactions. Management reviewed with the EQRx board of directors the terms of the proposed engagement of Goldman Sachs and customary relationship disclosure provided by Goldman Sachs regarding the parties then in active discussions with EQRx. The EQRx board of directors thereafter authorized EQRx to formally engage Goldman Sachs on the terms presented at the meeting. On the following day, EQRx and Goldman Sachs entered into the related engagement letter.

On January 31, 2023, EQRx entered into a mutual confidentiality agreement with Party C to facilitate further discussions regarding a potential strategic transaction. The confidentiality agreement included a standstill provision applicable to Party C that terminated upon the public announcement by EQRx of its entry into a definitive agreement with a third party involving the acquisition of EQRx. Thereafter, members of EQRx senior management had discussions with representatives of Party C regarding EQRx’s business and product candidates and the potential framework for a partnering transaction between the parties, including a possible equity investment by Party C in EQRx. Following these discussions, Party C determined not to proceed due to other strategic priorities.

On March 9, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and a representative of Goodwin were present. At this meeting, management provided an update regarding the status of discussions with potential counterparties, including the types of transactions under consideration, proposed timelines, and potential next steps, and reported on preliminary discussions with another biopharmaceutical company, referred to as Party D, that had expressed an interest in discussing a potential sale of Party D to EQRx. At this meeting, the EQRx board of directors determined not to proceed with further discussions with Party B due to a lack of strategic fit between the two companies. Management also provided certain business, portfolio, financial and operational updates. In addition, the EQRx board of directors discussed internal strategic options and pausing development of EQRx’s Global Buyers Club network after consideration of potential opportunities to partner with others.

On April 3, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and a representative of Goodwin were present. At this meeting, the EQRx board of directors discussed potential opportunities to acquire another company as a means to build EQRx’s portfolio with additional late-stage assets and considered the potential acquisition of Party D and another biopharmaceutical company, referred to as Party E, each of which had engaged in preliminary strategic discussions with EQRx. The meeting participants discussed potential transaction structures, valuation considerations and related operational matters. Management also provided an update on certain portfolio and operational matters.

On April 7, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and a representative of Goodwin were present. At this meeting, the EQRx board of directors continued its discussion of potential strategic acquisition opportunities. The EQRx board of directors also determined, as a matter of convenience and efficiency given the discussions with respect to a potential acquisition of Party D or Party E, to form the EQRx transaction committee, to (i) consider and evaluate all proposals that might be received by the Company in connection with any business development, strategic alternative, capital raising or financing opportunity identified by EQRx, (ii) participate in and direct the negotiation of the material terms and conditions of any such transaction, and (iii) recommend to the EQRx board of directors the advisability of entering into a definitive agreement with respect to any such transaction, subject to approval of any such agreement by the EQRx board of directors, or the advisability of pursuing any other alternative. The initial members of the EQRx transaction committee were the following independent directors: Paul Berns (Chair), Samuel Merksamer, and Krishna Yeshwant, M.D. Throughout the EQRx transaction committee’s evaluation of a

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potential strategic transaction, the EQRx transaction committee conducted formal meetings, but its members were also in regular informal discussions with EQRx’s senior management and legal and financial advisors and with each other. The EQRx transaction committee also met in executive session without management present.

On April 10, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and a representative of Goodwin were present. At this meeting, the EQRx transaction committee continued the discussion of potential strategic acquisition opportunities, including the possible acquisition of Party D or Party E. The EQRx transaction committee discussed views on valuation and market opportunity, transaction structure, and overall negotiation approach. The EQRx transaction committee also reviewed a draft indication of interest with respect to the acquisition of Party E and provided feedback to management. In addition, the EQRx transaction committee discussed potential interest in a specific asset of Party D instead of the acquisition of the whole company.

Following the meeting, EQRx submitted a preliminary, non-binding indication of interest proposing to acquire all of the outstanding shares of Party E for consideration consisting of a mix of cash and EQRx common stock, including a contingent value right, or CVR, in the event of achievement of certain development milestones. Party E rejected this proposal, and EQRx and Party E thereafter had sporadic contact with respect to potentially re-engaging in discussions regarding a possible transaction. EQRx also proposed a transaction involving a specific asset to Party D, which Party D rejected. EQRx and Party D did not engage in further discussions regarding a potential transaction.

On April 28, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and a representative of Goodwin were present. At this meeting, and in light of the results of the prior strategic outreach conducted by Goldman Sachs and EQRx management, the EQRx board of directors reviewed plans to reset EQRx’s business strategy by focusing on clinically differentiated medicines, including a near-term focus on lerociclib, along with other existing early-stage assets and potential in-licensing/acquisition opportunities. The meeting participants also discussed a planned reduction in force and proposed severance terms. In addition, management provided an update on the status of discussions with Party D and Party E and other business development activities.

On May 8, 2023, EQRx issued a press release reporting its first quarter 2023 financial results and providing updates on its portfolio and U.S. commercial strategy. In the press release, EQRx announced that the company was resetting its strategy to focus on clinically differentiated medicines. In addition, the press release indicated that EQRx would be (i) prioritizing development of lerociclib, (ii) seeking commercialization partnerships for aumolertinib, (iii) terminating license agreements for sugemalimab, nofazinlimab and EQ121, (iv) separating its early-stage immune-inflammatory research and development programs from its oncology business into a new wholly-owned subsidiary and pursuing additional funding options, and (v) implementing a substantial reduction in workforce that, together with certain portfolio decisions, was expected to drive annualized cash savings of at least $125 million and significantly lower future cash burn.

Following the May 8^th announcement regarding the reset of EQRx’s strategy and continuing through the signing of the merger agreement, EQRx continued further organizational streamlining while also considering options to deliver value to EQRx stockholders from its remaining assets. These efforts included (i) considering a potential partnership for further development of lerociclib, (ii) discussing commercialization rights in specified territories for aumolertinib, and (iii) creating a wholly-owned subsidiary for EQRx’s early stage immune-inflammatory assets and discussing with potential investors the funding of such entity on a standalone basis. While EQRx had discussions with a number of parties, EQRx did not receive any actionable proposals as a result of such efforts prior to entering into the merger agreement.

On May 16, 2023, Mark Goldsmith, M.D., Ph.D., President, Chief Executive Officer, and Board Chair of Revolution Medicines, contacted Melanie Nallicheri, President, Chief Executive Officer, and a Director of EQRx and a co-founder of Legacy EQRx, to introduce himself and request a conversation. Revolution Medicines had not been among the parties that EQRx had contacted as part of its prior outreach.

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On May 18, 2023, Ms. Nallicheri and Dr. Goldsmith had a call during which Dr. Goldsmith inquired as to whether EQRx would be open to a potential acquisition. During this conversation, Dr. Goldsmith indicated that Revolution Medicines was interested in adding EQRx’s cash resources to its own balance sheet in order to fund Revolution Medicines’ broad development plans for its programs. Ms. Nallicheri indicated that, while EQRx was focused on its reset business strategy, she would discuss with the EQRx board of directors any proposal that Revolution Medicines wished to submit and requested that management of Revolution Medicines provide an overview of the company to the EQRx management team. There was no discussion of the economic terms of a potential transaction during this meeting.

Following this call, Ms. Nallicheri informed the EQRx board of directors of the inquiry from Dr. Goldsmith. Throughout the strategic review processes conducted by EQRx, the EQRx board of directors identified and discussed past and current business relationships that certain directors had with potential participants in the process and, where appropriate to avoid potential conflicts or the appearance of potential conflicts, a particular director would recuse himself or herself from board and committee meetings (or portions thereof) relating to, and any deliberations or discussions regarding, a possible transaction with that participant. In this regard with respect to Revolution Medicines, Alexis Borisy, Executive Chairman of the EQRx board of directors and a co-founder of Legacy EQRx, is the Lead Independent Director of Revolution Medicines, and Clive Meanwell, M.B., Ch.B, M.D., an independent director of EQRx, is Vice Chairman and a member of the board of directors of BB Biotech AG, which, pursuant to a Schedule 13G filed with the SEC on February 14, 2023, beneficially owned in excess of five percent of the outstanding shares of Revolution Medicines common stock. Given Mr. Borisy’s relationship with Revolution Medicines and Dr. Meanwell’s relationship with BB Biotech and the potential conflicts or the appearance of potential conflicts that could arise as a result of these relationships, Mr. Borisy and Dr. Meanwell recused themselves from board and committee meetings (or portions thereof) relating to, and any deliberations or discussions regarding, a potential transaction with Revolution Medicines or any of the other potential counterparties contacted by EQRx.

On May 20, 2023, EQRx entered into a confidentiality agreement with Revolution Medicines to facilitate discussions between the parties. The confidentiality agreement did not include a standstill provision.

On May 22, 2023, members of Revolution Medicines management provided an overview of their company’s business, portfolio and operations to members of EQRx management. There was no discussion of the economic terms of a potential transaction during this meeting.

On May 23, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an overview of the company’s various business development activities in light of on-going discussions with potential counterparties and other alternatives, including the potential return of capital to stockholders of EQRx. Ms. Nallicheri also reported on the initial discussions with Revolution Medicines, and management provided an overview of Revolution Medicines, including potential near- and long-term catalysts. In addition, management provided updates on the potential strategic acquisition of Party E, including the status of discussions between the parties and proposed next steps, and the on-going discussions with certain parties regarding a potential licensing transaction. The representatives of Goldman Sachs also were invited to the meeting to review potential strategic alternatives for EQRx taking into account the prior strategic process undertaken by the EQRx board of directors with the assistance of Goldman Sachs and EQRx’s reset business strategy, including potential transaction structures, counterparties that might have interest in EQRx’s significant capital, and planned timelines. Following discussion, the EQRx transaction committee authorized Ms. Nallicheri to continue discussions with Revolution Medicines regarding a potential transaction. Mr. Borisy attended a portion of this meeting at the request of the EQRx transaction committee to provide his general perspective on potential strategic paths for EQRx, but did not participate in any discussions regarding a potential transaction with Revolution Medicines.

On May 31, 2023, Ms. Nallicheri and Dr. Goldsmith had a call during which they discussed the framework for a potential transaction between EQRx and Revolution Medicines. During this discussion, Dr. Goldsmith

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indicated that Revolution Medicines was viewing the potential transaction as additional financing for its programs and, as a result, Revolution Medicines was not interested in advancing EQRx’s portfolio following closing. There was no discussion of the economic terms of a potential transaction during this meeting.

On June 1, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, the EQRx transaction committee continued its discussion regarding potential strategic paths for EQRx and counterparties that might have interest in EQRx’s significant capital. Ms. Nallicheri also provided an update regarding her recent discussion with Dr. Goldsmith. Mr. Borisy attended a portion of this meeting at the request of the EQRx transaction committee to provide his general perspective on potential strategic paths for EQRx, but did not participate in any discussions regarding a potential transaction with Revolution Medicines.

On June 2, 2023, Revolution Medicines submitted a preliminary, non-binding indication of interest, referred to as the June 2^nd Proposal, proposing to acquire all of the outstanding shares of EQRx with a symmetrical fixed price collar structure designed to deliver $1.95 in value per share of EQRx common stock within the collar range. The transaction would include a fixed exchange ratio with respect to the portion of a share of Revolution Medicines common stock that would be exchanged for a share of EQRx common stock and, in addition to such guaranteed number of shares of Revolution Medicines common stock to be delivered to EQRx stockholders, a range of cash between $0 and $400 million would be used to ensure delivery of a fixed value to EQRx stockholders of $1.95 per share. At the upper end of the proposed collar, EQRx stockholders would receive a portion of a share of Revolution Medicines common stock worth $1.95 and no cash, and at share prices for Revolution Medicines above $31.33, EQRx stockholders would receive more than $1.95 per share in value at closing. At the lower end of the proposed collar, EQRx stockholders would receive the maximum amount of cash of $400 million, and at share prices for Revolution Medicines below $18.53, EQRx stockholders would not receive additional consideration beyond the fixed number of shares of Revolution Medicines common stock and the maximum cash. The June 2^nd Proposal also contemplated that, at the time of entry into a definitive agreement, certain directors, officers and major stockholders of EQRx would execute voting agreements pursuant to which they would agree to support and vote in favor of the transaction. The June 2^nd Proposal further noted Revolution Medicines’ expectation that the parties would sign and announce a transaction by June 20^th. Prior to submission, Dr. Goldsmith contacted Ms. Nallicheri to review the terms of the proposal.

On June 3, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx were present. At this meeting, Ms. Nallicheri provided an update regarding the receipt of the June 2^nd Proposal from Revolution Medicines and her related conversation with Dr. Goldsmith, and the meeting participants had an initial discussion regarding the terms of the proposal, including the value of the proposed merger consideration as compared to EQRx’s expected net cash balance. At the conclusion of this discussion, the EQRx transaction committee authorized Ms. Nallicheri to provide Dr. Goldsmith with initial feedback regarding the June 2^nd Proposal.

On June 5, 2023, Ms. Nallicheri had a call with Dr. Goldsmith during which she provided feedback on the June 2^nd Proposal as authorized by the EQRx transaction committee. In particular, Ms. Nallicheri indicated that the June 2^nd Proposal was inadequate, as the proposed merger consideration was less than the net cash that EQRx believed it could deliver at closing. Dr. Goldsmith noted that Revolution Medicines did not intend to pay more than the net cash to be delivered by EQRx in a potential transaction (taking into account the wind-down costs for EQRx’s programs, which Revolution Medicines did not intend to advance) and requested that EQRx provide further information regarding its calculation of estimated net cash. Ms. Nallicheri and Dr. Goldsmith also discussed the timeline for a potential transaction.

Later on June 5, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an update regarding her recent discussion with Dr. Goldsmith. The representatives of Goodwin reviewed with the directors their fiduciary duties under Delaware law and related process

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considerations. The meeting participants discussed the potential alternative of returning capital to EQRx stockholders and the preparation of a liquidation analysis to determine an estimate of net cash available for distribution as a comparator to the proposal from Revolution Medicines or any similar transaction. The representatives of Goldman Sachs also provided overviews of Revolution Medicines and the June 2^nd Proposal, including the proposed fixed collar and cash backstop mechanisms. The meeting participants also discussed a preliminary list of public and private biopharmaceutical companies determined by size, significant financing need, and potential ability to achieve large-scale returns that could have interest in a transaction focused on the deployment of EQRx’s significant cash balance similar to the one proposed by Revolution Medicines.

Commencing on June 7, 2023, at the direction of the EQRx transaction committee, representatives of Goldman Sachs contacted 21 publicly-traded and private biopharmaceutical companies regarding a potential transaction with EQRx focused on the redeployment of EQRx’s significant cash balance. Five of these 21 parties, including Party C, had been previously contacted regarding a potential acquisition of EQRx. Of the 21 parties contacted, five of these parties, including three publicly-traded companies, referred to as Party F, Party G and Party H, and two private companies, referred to as Party I and Party J, expressed interest in a potential transaction with EQRx and entered into confidentiality agreements with EQRx in order to engage in further discussions. Each of the confidentiality agreements included standstill provisions, with the standstill provision terminating upon EQRx’s entry into a definitive agreement with a third party involving the acquisition of EQRx or the public announcement thereof. Over the next few days, Ms. Nallicheri had introductory conversations with members of senior management of several of the parties that had expressed interest in a potential transaction.

On June 7, 2023, Ms. Nallicheri had a call with Dr. Goldsmith to discuss the minimum net cash that EQRx believed it would be able to deliver in connection with a transaction based on currently projected year-end cash of $1.05 billion.

Also on June 7, 2023, the Chief Financial Officer of Party E contacted Ms. Nallicheri to express interest in re-engaging in discussions with respect to an all-stock transaction to combine the two companies, and noted that Party E would revert with further feedback following an upcoming meeting of its board of directors.

On June 8, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided updates regarding her June 7, 2023 discussion with Dr. Goldsmith and the status of discussions with Party E. The representatives of Goldman Sachs also provided an update on their outreach to the parties discussed at the June 5^th meeting of the EQRx transaction committee. The meeting participants discussed Revolution Medicines’ intention to not advance EQRx’s research and development portfolio following closing of a transaction and additional business development activities to be undertaken to determine whether value could be realized for such assets for the benefit of EQRx stockholders. In addition, the EQRx transaction committee provided guidance to Ms. Nallicheri with respect to a meeting with management of Revolution Medicines scheduled for the following day.

On June 9, 2023, Ms. Nallicheri and Dina Ciarimboli, General Counsel of EQRx, had a meeting with Dr. Goldsmith and Margaret Horn, Chief Operating Officer of Revolution Medicines, during which they discussed the near-term catalyst events for Revolution Medicines, including the anticipated timeline for public release of clinical data with respect to RMC-6236, structural alternatives for a potential transaction between the two companies, and EQRx’s remaining portfolio of assets. Among the structural alternatives discussed were the collar structure proposed by Revolution Medicines, the consideration mix between cash and stock, and a potential cash/stock election mechanism. Ms. Nallicheri also noted EQRx’s expectation that the shares of Revolution Medicines common stock in the transaction would be issued at a discount to the market price similar to the discount that would be expected by Revolution Medicines in an equity financing transaction.

On June 12, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri

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provided an update regarding the recent meeting with representatives of Revolution Medicines. The representatives of Goldman Sachs also provided an update on their outreach to the parties discussed at the June 5^th meeting of the EQRx transaction committee and reviewed an illustrative process timeline.

On June 13, 2023, the EQRx compensation and talent development committee held a meeting at which Mr. Borisy, other members of senior management of EQRx, and a representative of Goodwin were present. At this meeting, the meeting participants discussed various topics relating to employee retention, including key employees necessary for on-going strategic efforts, the potential timing and structure of a retention program, and the focus on maximizing cash on hand where possible in light of the strategic process generally (there were no specific discussions regarding a potential transaction with Revolution Medicines at the meeting). The EQRx compensation and talent development committee requested that management prepare a specific proposal of retention packages for key employees for the committee’s further consideration.

On June 14, 2023, the EQRx board of directors held a regularly-scheduled meeting at which management provided business, portfolio and financial updates. Thereafter, the independent and disinterested directors met with members of senior management of EQRx and representatives of each of Goldman Sachs and Goodwin to discuss certain strategic alternatives, including (i) the potential to build on EQRx’s existing portfolio consistent with its reset business strategy through the acquisition of another company and/or other business development activities, (ii) the potential to redeploy EQRx’s significant capital into another company through a transaction with Revolution Medicines or a similar transaction with another counterparty, and (iii) the potential to return capital to EQRx stockholders. The meeting participants also discussed whether there was any opportunity to generate value from EQRx’s remaining assets under each strategic path and EQRx’s on-going business development activities. The representatives of Goodwin reviewed with the directors their fiduciary duties under Delaware law and related process considerations. Ms. Nallicheri provided updates on the status of discussions with Party E and the June 9^th meeting with representatives of Revolution Medicines. Ms. Nallicheri also noted that, at the direction of the EQRx transaction committee, management would be engaging a third-party consulting firm to prepare a liquidation analysis to be used as a comparator to other available options, including potentially a transaction with Revolution Medicines or another party or pursuit of EQRx’s reset strategy. The representatives of Goldman Sachs also provided an update on their outreach to the parties discussed at the June 5^th and June 12^th meetings of the EQRx transaction committee and reviewed an illustrative process timeline. The meeting participants then discussed the pros and cons of the various strategic options and potential next steps.

On June 18, 2023, the EQRx board of directors held a meeting at which members of senior management of EQRx and Goodwin were present. At this meeting, the EQRx board of directors discussed the process for identifying and avoiding potential conflicts or the appearance of potential conflicts of interest with respect to potential counterparties to a transaction. Following this discussion and to facilitate appropriate director recusals, the EQRx transaction committee was enlarged to include five members consisting of Paul Berns (Chair), Jorge Conde, Kathryn Giusti, Samuel Merksamer and Krishna Yeshwant, M.D. The EQRx transaction committee invited the independent and disinterested directors not serving on the committee, referred to as the invited directors, to attend all subsequent committee meetings. The EQRx transaction committee and other invitees, including an invited director, members of senior management of EQRx, and representatives of Goldman Sachs and Goodwin, then discussed the selection criteria upon which to assess potential counterparties, which criteria included the following: (i) later-stage assets in the counterparty’s development pipeline; (ii) potential of the counterparty’s product candidates to reach a large total addressable market; (iii) a $1 billion or more capital influx expected to significantly catalyze the counterparty’s efforts; (iv) feasibility of this type of transaction with the counterparty, including the ability to obtain the required stockholder approvals and otherwise satisfy the conditions to closing; and (v) in the case of a counterparty that was a private company, such counterparty’s public company readiness. Management reviewed the methodology and assumptions for preparing a preliminary projection of available net cash (assuming the wind-down of its existing programs, which would not be able to be completed prior to the closing of a transaction) that a counterparty to a transaction would be able to deploy for its ongoing operations. The representatives of Goldman Sachs also provided updates on their outreach to potential

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counterparties and discussions with those parties that had expressed interest in a possible transaction with EQRx, and reviewed an illustrative process timeline. The meeting participants discussed scheduling management presentations with each of Revolution Medicines and the five parties that had expressed interest in a potential transaction with EQRx to assess such counterparties against the criteria discussed at the meeting, as well as with Party E given Party E’s expressed interest in a potential stock-for-stock transaction which would result in the redeployment of a significant portion of EQRx’s capital to Party E’s programs. The meeting participants also discussed certain structuring considerations with respect to a potential transaction, including (i) pro forma ownership of EQRx stockholders in the combined company, (ii) cash, if any, to EQRx stockholders, including a potential cash/stock election mechanism, (iii) potential downside protection and upside opportunity for EQRx stockholders, and (iv) potential, if any, for value realization from EQRx’s remaining assets.

On June 20, 2023, Ms. Nallicheri had a call with the Chief Executive Officer and the Chief Financial Officer of Party E during which the representatives of Party E further discussed their potential interest in a stock-for-stock merger with EQRx.

From June 20, 2023 through June 26, 2023, EQRx held a series of meetings with seven parties, including Revolution Medicines and each of Party E, F, G, H, I and J, during which management of each such party provided an overview of their company’s business, portfolio and operations to members of EQRx management, certain independent and disinterested directors of EQRx, and representatives of EQRx’s financial and legal advisors. There were no discussions of the economic terms of a potential transaction during these meetings, except that, at the conclusion of its presentation, Party H reviewed the high-level terms of a proposal for discussion with respect to a potential transaction with EQRx. The framework for the proposal provided for EQRx to make two investments totaling approximately $1.0 billion in Party H consisting of: (i) an upfront purchase by EQRx of approximately $600 million of common stock of Party H; and (ii) $400 million of committed future funding for Party H’s research and development programs (with the structure and economics to be discussed, including a potential collaboration format).

On June 23, 2023, representatives of Goldman Sachs provided additional information to the EQRx transaction committee with respect to certain structuring considerations for a potential transaction, including illustrative potential structures for a transaction with Revolution Medicines.

Also on June 23, 2023, the EQRx compensation and talent development committee held a meeting at which Mr. Borisy, other members of senior management of EQRx, and a representative of Goodwin were present. At this meeting, the meeting participants discussed employee retention matters in connection with the strategic process generally (there were no specific discussions regarding a potential transaction with Revolution Medicines at the meeting), including a general framework for cash and equity retention programs.

On June 25, 2023, the EQRx transaction committee held a meeting at which an invited director, members of senior management and representatives of Goldman Sachs and Goodwin were present. At this meeting, the EQRx transaction committee had a preliminary discussion regarding the parties that had provided management presentations to date. The meeting participants also discussed an illustrative transaction timeline, including the process for sending bid instruction letters to selected parties. Following this discussion, the EQRx transaction committee authorized representatives of Goldman Sachs to send a bid instruction letter to Revolution Medicines. The EQRx transaction committee determined to reconvene on the following day after completion of the final management presentation to finalize the list of other parties to be invited to submit a bid. Management also reviewed a preliminary projection of available net cash of $1.133 billion (before transaction expenses and after winding down EQRx’s existing programs, which process was assumed to be completed in 2024) that a counterparty to a transaction would be able to deploy for its on-going operations and the related assumptions. The EQRx transaction committee authorized management and representatives of Goldman Sachs to provide management’s preliminary projection of net cash to the parties involved in the process.

Later on June 25, 2023, a representative of Goldman Sachs, at the direction of the EQRx transaction committee, sent a bid instruction letter to Revolution Medicines setting forth the timing and procedures for

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submitting a revised proposal to acquire EQRx. The letter requested that Revolution Medicines’ revised proposal be submitted by June 29^th.

On June 26, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director, and representatives of Goldman Sachs and Goodwin were present. At this meeting, the EQRx transaction committee continued its discussion regarding Parties E, F, G, H, I and J that had provided management presentations to EQRx in the context of the selection criteria discussed at the June 18^th meeting of the EQRx transaction committee. Based on this discussion, the EQRx transaction committee determined to invite Parties G, H and J to submit bids to acquire EQRx and discontinue discussions with Parties E, F and I due to a failure to meet one or more of the selection criteria. The meeting participants discussed timing considerations and next steps, during which discussion the EQRx transaction committee authorized representatives of Goldman Sachs to send bid instruction letters to Parties G, H and J. Also at this meeting, the representatives of Goldman Sachs reported on an inbound call received from a party that had not previously been contacted, which party expressed interested in a potential reverse merger with EQRx. The EQRx transaction committee discussed the party expressing interest in the context of the selection criteria and determined not to proceed with further discussions given that such party was a private company with early-stage assets.

Later on June 26, 2023, a representative of Goldman Sachs, at the direction of the EQRx transaction committee, sent a bid instruction letter to each of Parties G, H and J setting forth the timing and procedures for submitting a proposal to acquire EQRx. The letter requested that proposals be submitted by June 29^th.

On June 27, 2023, Party G submitted a non-binding indication of interest with respect to the acquisition of EQRx in a stock-for-stock merger. The proposal provided for EQRx stockholders to receive newly issued shares of common stock of Party G with a value (based on the volume-weighted average price, or VWAP, of Party G’s common stock measured over a 10-trading day measurement period prior to closing) of $1.8466 per share, subject to a collar. As part of the proposal, Party G requested a three-week period of exclusivity to complete due diligence and negotiate definitive agreements. Prior to submitting the proposal, the Chief Executive Officer of Party G contacted Ms. Nallicheri to review the terms of the proposal.

On June 29, 2023, Revolution Medicines submitted a revised, non-binding indication of interest, referred to as the June 29^th Proposal, with respect to the acquisition of EQRx in a stock-for-stock merger. The June 29th Proposal provided that the merger consideration would be comprised of Revolution Medicines common stock with an implied value of $1.075 billion, representing a value of approximately $2.17 per share of EQRx common stock based on the assumptions set forth in the June 29th Proposal regarding the number of shares of EQRx common stock treated as outstanding. The number of shares of Revolution Medicines common stock to be delivered as merger consideration would be calculated based on a blend of the share price of Revolution Medicines common stock at two points in time: (i) $200 million of Revolution Medicines common stock based on the share price at signing of the definitive agreement for the transaction, plus (ii) $850 million of Revolution Medicines common stock based on the share price at closing of the transaction subject to a 3% discount (resulting in delivery of $875 million of Revolution Medicines common stock at such closing share price). In the June 29th Proposal, Revolution Medicines compared the $1.075 billion of implied value to its assumption that EQRx would have $1.05 billion of available net cash that Revolution Medicines would be able to deploy for its on-going operations (i.e., the preliminary projection of net cash of $1.133 billion provided by EQRx, less an additional $83 million of expenses estimated by Revolution Medicines for transaction expenses and additional operating and wind-down expenses). The June 29th Proposal also contemplated that, at the time of entry into the definitive transaction agreement, certain directors, officers and major stockholders of EQRx would execute voting agreements under which they would agree to support and vote in favor of the transaction, as well as customary lock-up provisions that would extend 90 days post-closing. The June 29th Proposal further noted Revolution Medicines’ expectation that the parties would sign and announce a transaction by July 24th. Following submission, Dr. Goldsmith and Ms. Nallicheri discussed the contents of the June 29th Proposal via telephone.

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Also, on June 29, 2023, Party J submitted a non-binding indication of interest for a “reverse merger” transaction with EQRx. The proposed transaction consisted of a merger of a newly-formed, wholly owned subsidiary of EQRx with and into Party J, with stockholders of Party J receiving shares of EQRx common stock in the merger. Party J proposed pro forma ownership of the combined entity of 50% to existing EQRx securityholders and 50% to Party J’s existing securityholders, and the issuance of a CVR to existing stockholders of Party J that would be triggered upon achievement of a regulatory milestone with respect to one of Party J’s product candidates. The amount of the CVR payment would be equal to 15% of the then outstanding shares of the combined company at the time that the payment was triggered. The proposal also referenced EQRx designating three of seven directors on the board of directors of the combined company, and the management team of the combined company being led by Party J’s CEO, with the remainder of the management team to be determined based on the best candidates from each company. Party J further indicated their expectation to reach a definitive agreement within 30 days, subject to consummation of mutual diligence. Following submission, the Chief Executive Officer of Party J and Ms. Nallicheri met to discuss the contents of the proposal.

In addition, on June 29, 2023, the EQRx compensation and talent development committee approved cash and equity retention awards for certain key employees. See “—Interests of EQRx’s Directors and Executive Officers in the Mergers” for information regarding the retention awards to certain executive officers.

On June 30, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director, and representatives of Goldman Sachs and Goodwin were present. At this meeting, the meeting participants discussed the June 29^th Proposal received from Revolution Medicines and the proposals received from Parties G and J. The representatives of Goldman Sachs summarized each of these proposals, including the approximate value of the consideration reflected by each proposal, based on certain assumptions relating to EQRx and the bidders provided by management to representatives of Goldman Sachs, as follows: (i) $1.075 billion for the Revolution Medicines’ proposal (taking into account the pricing discount proposed by Revolution Medicines), which represented a $125 million increase from the approximately $950 million value implied by the June 2^nd Proposal; (ii) $923 million for Party J’s proposal; and (iii) $900 million for Party G’s Proposal. Ms. Nallicheri and the representatives of Goldman Sachs also reported on their conversations with certain parties in connection with the bid deadline. In particular, the representatives of Goldman Sachs noted that Party H did not intend to submit a proposal with respect to the acquisition of EQRx, but continued to be open to engaging with EQRx with respect to the proposal reviewed during Party H’s management presentation. Following discussion regarding the proposals received, the EQRx transaction committee determined to continue discussions with Revolution Medicines and discussed certain elements of the June 29^th Proposal, including (i) the aggregate value of $1.075 billion, (ii) the amounts of the two equity tranches (i.e., $200 million in the first tranche and $850 million in the second tranche), (iii) the 3% pricing discount to be applied to the second equity tranche, and (iv) the consideration consisting of all stock with no return of capital to EQRx stockholders. The EQRx transaction committee discussed potential feedback to Revolution Medicines regarding the June 29^th Proposal, and authorized Ms. Nallicheri to communicate such feedback to Dr. Goldsmith following the meeting. In addition, the EQRx transaction committee directed Goldman Sachs to contact Party H to inquire whether Party H would consider the acquisition of EQRx or any other alternative structure to the one that they had proposed. Also, given the proposals received by EQRx including the June 29^th Proposal, the EQRx transaction committee confirmed its prior determination not to proceed with further discussions with Parties E, F and I. During executive session, a representative of Goodwin reviewed with the EQRx transaction committee customary relationship disclosure regarding Revolution Medicines during the preceding two-year period made available by Goldman Sachs. Such disclosure indicated that, during such two-year period, Goldman Sachs Investment Banking had not performed any financial advisory and/or underwriting services for Revolution Medicines or any of their respective affiliates for which it had recognized compensation.

Later on June 30, 2023, Ms. Nallicheri contacted Dr. Goldsmith to provide him with the feedback authorized by the EQRx transaction committee earlier in the day. In particular, Ms. Nallicheri indicated that, while EQRx appreciated the revisions included in the June 29^th Proposal based on prior feedback, the EQRx board of directors was focused on the pricing discount being offered by Revolution Medicines. In a follow-up conversation, Dr. Goldsmith indicated that Revolution Medicines would not further revise its proposal without first receiving a specific counter from EQRx.

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Also on June 30, 2023, representatives of Goldman Sachs, as directed by the EQRx transaction committee, had a call with representatives of Party H, during which Party H confirmed that they would not be submitting a revised proposal nor were they open to entertaining alternative structures, including the acquisition of EQRx.

On July 1, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, the EQRx transaction committee continued its discussion of the June 29^th Proposal received from Revolution Medicines and the proposals received from Parties G and J. Ms. Nallicheri provided an update on her recent conversations with Dr. Goldsmith, and the representatives of Goldman Sachs reported on their conversation with representatives of Party H. The representatives of Goldman Sachs reviewed a comparison of the June 2^nd Proposal and the June 29^th Proposal as submitted by Revolution Medicines and the impact on the June 29^th Proposal of varying (i) the discount to be applied to the second equity tranche to be priced in proximity to the closing, (ii) the amounts of the two equity tranches, and (iii) the aggregate value being offered. Following discussion, the EQRx transaction committee determined to focus on the pricing discount on the second equity tranche and directed management to counter with a 12% discount. In addition, the EQRx transaction committee directed Goldman Sachs to contact Party G to inquire whether Party G had any flexibility in either price or the proposed timetable for signing a definitive agreement as set forth in their proposal. The EQRx transaction committee also determined to not proceed with further discussions with either Party H (given Party H’s lack of interest in a whole company transaction) or Party J (given Party J’s economic proposal, the earlier stage of development of its product candidates, and its perceived lack of public company readiness).

Following the EQRx transaction committee meeting on July 1, 2023, Ms. Nallicheri contacted Dr. Goldsmith to propose a 12% pricing discount on the second equity tranche as authorized by the EQRx transaction committee earlier in the day. Dr. Goldsmith responded that a 12% discount was unacceptable and subsequently countered at 4.5%. In addition, the representatives of Goldman Sachs, as directed by the EQRx transaction committee, had a call with representatives of Party G, during which Party G indicated that they did not intend to increase their offered price or materially delay their proposed signing date. Thereafter, EQRx did not have further discussions with Party G regarding a potential transaction.

Later on July 1, 2023, the EQRx transaction committee held a second meeting at which members of senior management of EQRx, invited directors, and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an update on her conversation with Dr. Goldsmith, and the representatives of Goldman Sachs reported on their conversation with representatives of Party G. The meeting participants continued their discussion of the June 29^th Proposal from Revolution Medicines and the pricing discount to be applied to the second equity tranche. Following this discussion, the EQRx transaction committee authorized Ms. Nallicheri to communicate to Dr. Goldsmith that the pricing discount needed to be in the high single digits and directed representatives of Goldman Sachs to negotiate the amount with Revolution Medicines’ financial advisor, Guggenheim Securities, LLC, referred to as Guggenheim Securities. Management also discussed with the EQRx transaction committee the engagement of BRG Transaction and Valuation Opinions, LLC, referred to as BRG, an affiliate of Berkeley Research Group, LLC, a consulting firm with a focus on corporate finance advisory services, to prepare an analysis for the EQRx board of directors with respect to EQRx’s estimated value to its stockholders in a liquidation scenario, including an estimate of the net cash that would be available for distribution to EQRx stockholders in connection with a potential future liquidation. The engagement letter with BRG provided for BRG to receive a fixed fee for these services.

Following the meeting on July 1, 2023, Ms. Nallicheri contacted Dr. Goldsmith to communicate that the pricing discount for the second equity tranche needed to be in the high single digits as authorized by the EQRx transaction committee. Thereafter, the representatives of Goldman Sachs, at the direction of the EQRx transaction committee, had several calls with representatives of Guggenheim Securities to discuss the pricing discount. During these calls, at the direction of the EQRx transaction committee, the representatives of Goldman Sachs proposed a 9% discount. The representatives of Guggenheim Securities reverted with a proposal from Revolution Medicines that they characterized as “best and final” at a 6% pricing discount on the second equity tranche and all other terms as set forth in the June 29^th Proposal.

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On July 3, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, invited directors and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an update on her conversation with Dr. Goldsmith, and the representatives of Goldman Sachs reported on their conversations with Guggenheim Securities. Following discussion, the EQRx transaction committee determined to accept the economic terms set forth in the June 29^th Proposal with the proposed 6% pricing discount on the second equity tranche, and authorized Ms. Nallicheri and representatives of Goldman Sachs to communicate the same to Dr. Goldsmith and Guggenheim Securities, respectively, which occurred following the meeting. The EQRx transaction committee also authorized Ms. Nallicheri to progress discussions with Dr. Goldsmith on other elements of a potential transaction, including treatment of EQRx’s remaining assets in the transaction and related structures, such as a CVR, to provide additional potential value to EQRx stockholders.

On July 4, 2023, Ms. Nallicheri had a call with Dr. Goldsmith to discuss (i) the on-going business development activities with respect to EQRx’s remaining assets, (ii) the composition of the Revolution Medicines board of directors following closing (without discussion of specific names of directors), (iii) the request by Revolution Medicines for certain EQRx stockholders to sign post-closing lock-up agreements, and (iv) certain general employee matters not specific to EQRx’s executive officers. During this discussion, Ms. Nallicheri proposed a potential CVR structure with respect to any proceeds that may be realized as a result of EQRx’s business development activities and two board seats on the board of directors of the combined company. Following this call, the respective financial and legal advisors of EQRx and Revolution Medicines had further conversations regarding these matters.

On July 5, 2023, Revolution Medicines provided EQRx with access to a virtual data room populated by Revolution Medicines with certain due diligence items. Thereafter, EQRx provided supplemental due diligence requests and had further discussions with members of senior management of Revolution Medicines as requested to discuss Revolution Medicines’ business, operations, product candidates, clinical programs and timelines, intellectual property, strategic plans, and financial position.

On July 6, 2023, EQRx and Revolution Medicines entered into an amendment to their existing confidentiality agreement to add reciprocal standstill and employee non-solicitation provisions. The amendment to the confidentiality agreement provided each party with the ability to make confidential acquisition proposals to the other party at any time and also included other “sunset” provisions on the standstill obligations, including termination upon the other party’s entry into a definitive agreement involving an acquisition of such party. Following entry into the amendment, EQRx provided Revolution Medicines with access to a virtual data room populated by EQRx with certain due diligence items. Thereafter, Revolution Medicines provided supplemental due diligence requests and had further discussions with members of senior management of EQRx as requested to discuss EQRx’s business, operations, remaining assets, liabilities, and financial position.

On July 11, 2023, representatives of outside counsel to Revolution Medicines, Latham & Watkins LLP, referred to as Latham, provided an initial draft of the merger agreement to Goodwin. Following delivery of the draft merger agreement until the execution of the merger agreement, representatives of senior management of EQRx and Revolution Medicines, together with representatives of Goldman Sachs, Goodwin, Guggenheim and Latham, negotiated the terms of the merger agreement, in each case, as authorized and under the direction of their respective boards of directors or transaction committees. As part of these discussions, the representatives of Revolution Medicines requested that EQRx investigate the possibility of terminating the EQRx private warrants and EQRx earn-out shares in advance of signing a definitive agreement for the proposed transaction. In addition, the representatives of EQRx raised potential structural mechanisms, such as a CVR or closing cash true-up, that could be implemented in the event that EQRx was able to find a buyer or partner with respect to its remaining assets; however, the representatives of Revolution Medicines were unwilling to entertain such a structure.

On July 12, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, invited directors and representatives of Goldman Sachs and Goodwin were present. At this meeting,

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the representatives of Goodwin reviewed a summary of the terms of the draft merger agreement, and the EQRx transaction committee provided feedback to Ms. Nallicheri and the representatives of Goodwin and Goldman Sachs for purposes of the negotiation of the merger agreement. Ms. Nallicheri also provided updates on recent interactions with Revolution Medicines and the on-going business development activities with respect to EQRx’s remaining assets.

On July 13, 2023, Ms. Nallicheri had a call with Dr. Goldsmith to discuss certain proposed terms in the initial draft of the merger agreement and the timeline for a potential transaction.

Also on July 13, 2023, representatives of Latham provided initial drafts of the forms of EQRx voting and lock-up agreements to Goodwin. Thereafter, representatives of Goodwin and Latham negotiated the terms of such agreements, in each case, under the direction of their respective boards of directors or transaction committees.

On July 18, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, the representatives of Goodwin provided an update on the status of negotiations, and Ms. Nallicheri provided an update on her July 13^th conversation with Dr. Goldsmith. The meeting participants also discussed process and timing considerations. Ms. Nallicheri reported further inquiries from Party E and Party J, and the EQRx transaction committee decided not to re-open conversations with these parties for the reasons previously discussed. EQRx management also provided updates on the due diligence process with Revolution Medicines and EQRx’s on-going business development activities with respect to its remaining assets, which had yielded no actionable proposals. In addition, the representatives of Goldman Sachs informed the EQRx transaction committee that, under the particular circumstances of this transaction, in which EQRx’s principal asset is cash and EQRx does not have any stand-alone projections case that EQRx’s management or board considered reliable and adopted, as a matter of policy Goldman Sachs would not be in a position to render an opinion regarding the fairness of the proposed consideration in the transaction. In executive session, the EQRx transaction committee discussed the engagement of another financial advisor to provide a fairness opinion to the EQRx board of directors if the transaction with Revolution Medicines were to proceed, and authorized management and the representatives of Goodwin to contact MTS about this potential engagement.

On July 20, 2023, the EQRx transaction committee held a meeting at which members of EQRx management, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an update on the due diligence process, including with respect to Revolution Medicines’ clinical programs and planned data disclosures. The representatives of Goodwin provided an update on the status of negotiations with respect to the merger agreement, including a summary of the outstanding issues and potential opportunities to mitigate execution and/or market risk to EQRx stockholders. The meeting participants also discussed process considerations and next steps.

Later on July 20, 2023, Ms. Nallicheri had a call with Dr. Goldsmith to discuss the status of negotiations of the definitive transaction agreements. Thereafter, Ms. Nallicheri, together with other representatives of EQRx senior management and Goodwin, and Dr. Goldsmith, together with other representatives of Revolution Medicines senior management and Latham, had multiple calls to negotiate the open issues in the merger agreement, including, among other things, (i) the timeline to closing and the pricing period for the second equity tranche, (ii) the covenants governing EQRx’s business activities between signing and closing, including compliance by EQRx with an operating and capital expenditure budget, the wind-down of certain mutually-agreed EQRx programs, and other restrictions on EQRx’s operations, (iii) the covenants governing Revolution Medicines’ business activities between signing and closing, including limitations on its ability to issue additional equity, incur debt and make other acquisitions, (iv) treatment of the outstanding EQRx warrants and EQRx earn-out shares and the extent to which such securities would be included in the EQRx fully-diluted share number for purposes of determining the exchange ratio, (v) the request for voting and lock-up agreements, including the parties to those agreements, (vi) treatment of EQRx employees generally in connection with the

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wind-down activities and closing of the transaction, (vii) representation for EQRx on the combined company’s board of directors, (viii) the termination fees payable by the parties under certain circumstances, (ix) expense reimbursement in an agreed-upon amount in the event that either party’s stockholders did not approve the transaction, and (x) tax treatment of the transaction.

On July 21, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri and the representatives of Goodwin reported on the recent negotiations of the merger agreement with representatives of Revolution Medicines and Latham. As part of this discussion, Ms. Nallicheri noted that Revolution Medicines had agreed to providing one board seat for an EQRx independent director following closing. Ms. Nallicheri also provided an update on the due diligence process, preparation of financial projections for Revolution Medicines and a business case for EQRx’s remaining assets (noting that such business case would be incomplete, as acquisitions of late-stage clinical assets would be necessary to pursue this strategy), and the status of the liquidation analysis. Ms. Nallicheri indicated that, based on the additional work that had been undertaken, EQRx expected to have more net cash available following the wind-down of its programs than the $1.05 billion reflected in the June 29th Proposal.

On July 22, 2023, Ms. Nallicheri had a call with Dr. Goldsmith during which Ms. Nallicheri indicated that, based on current assumptions that were continuing to be refined, EQRx expected to have more net cash available following the wind-down of its programs than the $1.05 billion assumed by Revolution Medicines. Dr. Goldsmith asked for further information regarding the expected net cash and indicated that he did not intend to further discuss this matter until all of the other terms had been negotiated. Ms. Nallicheri and Dr. Goldsmith also discussed the one board seat to be allocated to EQRx at closing, including the possibility of Sandra Horning, M.D., a co-founder of Legacy EQRx and current independent member of the EQRx board of directors, filling that seat. Following this discussion, Dr. Goldsmith requested that Ms. Nallicheri introduce him to Dr. Horning. Thereafter, with the consent of the EQRx transaction committee, Dr. Horning and Dr. Goldsmith had an introductory call.

On July 23, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, management, as well as external consultants engaged by EQRx at the request of the EQRx transaction committee, reported on the results of the clinical review of Revolution Medicines’ programs. The meeting participants discussed the opportunities and risks presented by such programs, including regulatory, manufacturing and CMC matters, and the competitive environment. Ms. Nallicheri and the representatives of Goodwin also reported on the on-going discussions with Revolution Medicines and negotiations of the merger agreement and related documents. In addition, the meeting participants discussed employee-related matters, including the adoption of a severance policy for employees at the level of Vice President and below given the anticipated reductions in force if the transaction with Revolution Medicines were to proceed. Ms. Nallicheri provided an update on the preparation of financial projections for Revolution Medicines and a business case for EQRx’s remaining assets, as well as the status of the liquidation analysis.

On July 25, 2023, the EQRx compensation and talent development committee held a meeting at which members of senior management of EQRx and representatives of Goodwin were present. At this meeting, management reviewed various topics relating to potential reductions in force during the remainder of 2023 in the event that EQRx were to reach agreement with Revolution Medicines regarding a potential transaction. In addition, the representatives of Goodwin provided an overview of the potential Code Section 4999 excise tax on certain employees of EQRx who may be subject to such excise tax, a list of affected employees, and potential approaches to mitigate any excise tax. The EQRx compensation and talent development committee determined that the imposition of the excise tax on such employees would result in an unintended personal tax burden that would deprive the individuals of a portion of the value of their compensatory payments in connection with the mergers, and authorized management and the representatives of Goodwin to pursue such mitigation efforts as may be agreed upon by Revolution Medicines. See the section titled “—Interests of EQRx’s Directors and Executive Officers in the Merger” for further information.

On July 26, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs, Goodwin and EQRx’s Delaware counsel,

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Richards, Layton & Finger, P.A., referred to as RLF, were present. At this meeting, the representatives of Goodwin and RLF reviewed the fiduciary duties of the directors in this context. Ms. Nallicheri and the representatives of Goodwin reported on the on-going negotiations of the merger agreement and related documents. Management also reviewed the process, methodology and assumptions with respect to the preparation of financial projections for Revolution Medicines and a business case for EQRx’s remaining assets. The representative of RLF then reviewed the liquidation and dissolution process in Delaware, including the required steps and expected timing. Representatives of BRG then joined the meeting and reviewed their liquidation analysis for EQRx, including the related methodology and assumptions. See the section titled “—Certain EQRx Unaudited Prospective Financial Information” for further information.

On July 28, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin were present. At this meeting, management reviewed standalone financial forecasts for Revolution Medicines for the remainder of calendar year 2023 and calendar years 2024 through 2042 prepared by EQRx senior management for use in evaluating a proposed transaction with Revolution Medicines (see the discussion of the Revolution Medicines forecasts prepared by EQRx in the section titled “—Certain EQRx Unaudited Prospective Financial Information”), which financial forecasts had been prepared based on the process, methodology and assumptions discussed at the July 26^th meeting of the EQRx transaction committee. The meeting participants also discussed how these financial projections compared to current analyst estimates for Revolution Medicines. In addition, the meeting participants discussed the excess net cash expected to be available following the wind-down of EQRx’s programs and the plan to request an increase in the aggregate value being provided by Revolution Medicines as a result. The meeting participants also discussed that, following further investigation, EQRx would not be able to terminate the EQRx private warrants or all of the EQRx earn-out shares prior to the signing of a definitive agreement with Revolution Medicines, and the potential impact on the calculation of the exchange ratio. The EQRx communications team, including representatives of its external communications firm, also joined for a portion of the meeting and reviewed the communications planning process.

Later on July 28, 2023, Ms. Nallicheri had a call with Dr. Goldsmith to further discuss the excess net cash expected by EQRx management to be delivered by EQRx and the inability to terminate the EQRx private warrants or all of the EQRx earn-out shares prior to signing. Following this conversation, representatives of Goldman Sachs also had a discussion with representatives of Guggenheim Securities regarding these matters, and members of EQRx management had a call with members of Revolution Medicines management to further discuss EQRx management’s estimate of the net cash expected to be delivered to Revolution Medicines as a result of the transaction.

On July 29, 2023, the EQRx transaction committee held a meeting at which members of management of EQRx, invited directors and representatives of Goldman Sachs and Goodwin were present. At this meeting, Ms. Nallicheri provided an update on the status of discussions with Revolution Medicines and the remaining open points on the merger agreement. The representatives of Goldman Sachs then reviewed a preliminary illustrative financial analysis of the combined company based on preliminary transaction terms that were subject to further negotiation. Also at this meeting, management reviewed an illustrative standalone business case for EQRx’s remaining assets for reference purposes, noting that the related financial forecasts were incomplete as a stand-alone business plan as the forecasts did not include potential acquisitions of late-stage clinical assets, which would be necessary to consider for this business case to be viable, because such acquisitions could not be predicted nor could their potential financial impact be quantified (see the discussion of the EQRx standalone business case in the section titled “—Certain EQRx Unaudited Prospective Financial Information”). Given the unreliability and incompleteness of the standalone business case, the EQRx transaction committee directed MTS to use the liquidation analysis from EQRx management that was based on the BRG liquidation analysis in connection with the preparation of MTS Securities’ fairness opinion (see the sections titled “—Certain EQRx Unaudited Prospective Financial Information” and “—Opinion of MTS Securities, EQRx’s Financial Advisor”). In addition, the meeting participants further discussed the excess net cash expected by EQRx management to be available and the treatment of the EQRx private warrants and EQRx earn-out shares in the

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transaction. Following this discussion, the EQRx transaction committee provided instruction to representatives of Goldman Sachs in negotiating these items with Guggenheim Securities. In executive session, the EQRx transaction committee also discussed the formal engagement of MTS as a financial advisor to EQRx to render a fairness opinion in connection with the proposed transaction with Revolution Medicines. Representatives of Goodwin reviewed with the EQRx transaction committee the terms of the proposed engagement of MTS and customary relationship disclosure regarding Revolution Medicines during the preceding two-year period made available by MTS. The EQRx transaction committee thereafter authorized EQRx to formally engage MTS on the terms presented at the meeting. Later that day, EQRx and MTS entered into the related engagement letter. See “—Opinion of MTS Securities, EQRx’s Financial Advisor” for further information regarding the engagement letter with MTS.

Later on July 29, 2023, representatives of Goldman Sachs, at the direction of the EQRx transaction committee, had calls with representatives of Guggenheim Securities to further discuss the expected excess net cash expected by EQRx management to be delivered by EQRx and the treatment of the EQRx private warrants and EQRx earn-out shares in the transaction. During this discussion, at the direction of the EQRx transaction committee, the representatives of Goldman Sachs communicated the following proposal: (i) $45-50 million in additional value to EQRx stockholders as a result of the excess net cash; and (ii) with respect to the calculation of the exchange ratio, the inclusion of no private warrants or EQRx earn-out shares in the EQRx fully-diluted share number. In addition, representatives of Goodwin communicated to representatives of Latham that EQRx did not expect to deliver termination of all of the earn-out shares at or prior to signing of a merger agreement.

Also on July 29, 2023, a representative of Goodwin updated Mr. Borisy on the general status of discussions with Revolution Medicines, but not the terms, and the related request from Revolution Medicines that he sign voting and lock-up agreements in connection with the proposed transaction.

On July 30, 2023, representatives of Latham distributed to Goodwin a revised draft of the merger agreement and certain related documents characterized as Revolution Medicines’ final proposal, including with respect to the points raised by Ms. Nallicheri during her July 28^th call with Dr. Goldsmith. The revised terms included (i) an increase in the second tranche of equity consideration from $850 million to $870 million, (ii) a change in the previously agreed-upon pricing measurement period for the first tranche of equity consideration from the VWAP of Revolution Medicines common stock during the five trading days prior to signing to the ten trading days prior to signing, and (iii) the inclusion of 10% of the EQRx private warrants and 50% of the EQRx earn-out shares not waived prior to closing in the EQRx fully-diluted share number used to calculate the exchange ratio.

Later on July 30, 2023, the EQRx transaction committee held a meeting at which members of senior management of EQRx, invited directors and representatives of Goldman Sachs and Goodwin were present. At this meeting, the representatives of Goodwin reviewed the changes to the merger agreement set forth in the most recent draft provided by Latham. The representatives of Goldman Sachs also reviewed the increased amount of the second equity tranche, the changed pricing period for the first equity tranche, and the inclusion of portions of the EQRx private warrants and EQRx earn-out shares in the fully-diluted share number used to calculate the exchange ratio. Following discussion, the EQRx transaction committee determined to accept the $20 million increase in the value of the second equity tranche, but directed representatives of Goldman Sachs to contact Guggenheim Securities to provide the following counter: (i) 10% for the inclusion of non-waived EQRx earn-out shares in the EQRx fully-diluted share number; and (ii) a five-day VWAP pricing period for the first equity tranche.

Following the meeting, at the direction of the EQRx transaction committee, representatives of Goldman Sachs contacted representatives of Guggenheim Securities and made the counteroffer authorized by the EQRx transaction committee. Representatives of Guggenheim Securities subsequently contacted representatives of Goldman Sachs with the “best and final” offer from Revolution Medicines, consisting of: (i) 10% for the inclusion of non-waived earn-out shares in the EQRx fully-diluted share number; and (ii) a fixed price of $26.00 per share of Revolution Medicines common stock for purposes of the first equity tranche in lieu of a VWAP calculation over a specified trading period.

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Later on July 30, 2023, the EQRx transaction committee reconvened with members of senior management of EQRx, an invited director and representatives of Goldman Sachs and Goodwin present. At this meeting, the representatives of Goldman Sachs provided a report on their conversations with Guggenheim Securities and reviewed the impact on the implied exchange ratio and price per share to EQRx stockholders of Revolution Medicines’ offer. Following discussion, the EQRx transaction committee determined to proceed with the finalization of the transaction with Revolution Medicines on the terms proposed.

On July 31, 2023, the EQRx transaction committee and the EQRx board of directors held a joint meeting, at which members of senior management of EQRx and representatives of Goldman Sachs, MTS and Goodwin were present, to consider approval of the proposed transaction with Revolution Medicines. At the meeting, representatives of Goodwin and management updated the EQRx board of directors regarding the recent interactions with Revolution Medicines and the status of the definitive transaction documentation. The representatives of Goodwin reviewed the fiduciary duties of the directors in this context and, thereafter, reviewed the terms of the proposed merger agreement and the related documentation. A representative of MTS Securities then reviewed with the EQRx board of directors its financial analysis of the exchange ratio to be received by the holders of shares of EQRx common stock (other than Revolution Medicines or any of its affiliates or any holders of excluded EQRx shares) pursuant to the mergers, and MTS Securities then rendered to the EQRx board of directors its oral opinion (which was subsequently confirmed by delivery of a written opinion as of July 31, 2023) that, as of such date and based upon and subject to the various assumptions made, procedures followed, matters considered and qualifications and limitations set forth in such written opinion, the exchange ratio to be received by the holders of EQRx common stock (other than Revolution Medicines or any of its affiliates or any holders of excluded EQRx shares) pursuant to the mergers was fair, from a financial point of view, to such holders. The full text of the written opinion of MTS Securities sets forth the assumptions made, procedures followed, matters considered and qualifications and limitations on the review undertaken by MTS Securities in connection with its opinion. Based on the present operations of EQRx and at EQRx’s direction and with EQRx’s consent, MTS Securities used the liquidation values of EQRx as provided to MTS Securities by the EQRx transaction committee. MTS Securities expresses no opinion regarding the liquidation value of EQRx, Revolution Medicines or any other entity and have assumed that there had been no material change in the assets, financial condition, business or prospects of EQRx, Revolution Medicine or any of their respective subsidiaries since the date of the most recent relevant financial statements or financial information made available to MTS Securities. For more information on MTS Securities’ opinion, see “—Opinion of MTS Securities, EQRx’s Financial Advisor.” Following discussion and consideration of the merger agreement and the other transactions contemplated by the merger agreement (including the factors described in the section titled “—Recommendation of the EQRx Board of Directors; EQRx’s Reasons for the Mergers”), the EQRx transaction committee unanimously adopted resolutions recommending to the EQRx board of directors that the EQRx board of directors: (i) determine that the transactions contemplated by the merger agreement, including the mergers, were advisable and fair to, and in the best interests of, EQRx and its stockholders; (ii) approve and declare advisable the merger agreement and the transactions contemplated thereby; and (iii) resolve to recommend the adoption of the merger agreement by EQRx stockholders. Thereafter, based upon the unanimous recommendation of the EQRx transaction committee, the members of the EQRx board of directors, other than Mr. Borisy and Dr. Meanwell who did not attend the meeting, unanimously adopted resolutions: (i) determining that the transactions contemplated by the merger agreement, including the mergers, were advisable and fair to, and in the best interests of, EQRx and its stockholders; (ii) approving and declaring advisable the merger agreement and the transactions contemplated thereby; and (iii) resolving to recommend the adoption of the merger agreement by EQRx stockholders. As noted above, given Mr. Borisy’s relationship with Revolution Medicines and Dr. Meanwell’s relationship with BB Biotech and the potential conflicts or the appearance of potential conflicts that could arise as a result of these relationships, Mr. Borisy and Dr. Meanwell recused themselves from board and committee meetings (or portions thereof) relating to, and any deliberations or discussions regarding, a potential transaction with Revolution Medicines or any of the other potential counterparties contacted by EQRx.

Also at the meeting, the EQRx board of directors approved an amendment to EQRx’s engagement letter with Goldman Sachs in light of the fact that Goldman Sachs did not render a fairness opinion with respect to the

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proposed transaction, which amendment was entered into by EQRx and Goldman Sachs shortly thereafter. The engagement letter as so amended provides for Goldman Sachs to receive a transaction fee of approximately $16.8 million contingent upon consummation of the mergers. The engagement letter also provides for EQRx to reimburse Goldman Sachs for certain of its expenses, including attorneys’ fees and disbursements, and to indemnify Goldman Sachs and related persons against certain liabilities.

In addition, on July 31, 2023, the Revolution Medicines board of directors held a meeting, at which members of senior management of Revolution Medicines and representatives of Guggenheim Securities and Latham were present, to consider approval of the proposed transaction with EQRx. At the meeting, representatives of management updated the Revolution Medicines board of directors regarding the recent interactions with EQRx and the status of the definitive transaction documentation. Representatives of Guggenheim Securities then reviewed with the Revolution Medicines board of directors a financial analysis of the proposed transaction with EQRx. The representatives of Latham reviewed the fiduciary duties of the directors in this context and, thereafter, reviewed the terms of the proposed merger agreement and the related documentation. Following discussion and consideration of the merger agreement and the other transactions contemplated by the merger agreement (including the factors described in the section titled “—Recommendation of the Revolution Medicines Board of Directors; Revolution Medicines’ Reasons for the Mergers”), the members of the Revolution Medicines board of directors, other than Mr. Borisy who did not attend the meeting, unanimously adopted resolutions, among other things: (i) determining that the transactions contemplated by the merger agreement, including the mergers, were advisable and fair to, and in the best interests of, Revolution Medicines and its stockholders; (ii) approving and declaring advisable the merger agreement and the transactions contemplated thereby; and (iii) resolving to recommend the approval of the issuance of shares of Revolution Medicines common stock pursuant to the mergers by its stockholders. Given Mr. Borisy’s relationship with EQRx and the potential conflicts or the appearance of potential conflicts that could arise as a result of this relationship, Mr. Borisy recused himself from board and committee meetings (or portions thereof) of the Revolution Medicines board of directors and committees thereof where the transactions contemplated by the merger agreement were discussed, including any meetings of the transaction committee of the Revolution Medicines board, which was composed of independent members of the Revolution Medicines board of directors.

During the evening of July 31, 2023, EQRx, Revolution Medicines, Merger Sub I and Merger Sub II executed the merger agreement, certain directors, executive officers and significant stockholders of EQRx executed the EQRx voting agreements and the Revolution Medicines lock-up agreements, and certain directors, executive officers and significant stockholders of Revolution Medicines executed the Revolution Medicines voting agreements and the Revolution Medicines lock-up agreements. In addition, Mr. Borisy entered into an EQRx voting agreement and a Revolution Medicines lock-up agreement in the same forms as signed by other EQRx directors. See the section titled “The Ancillary Agreements” for further information.

Before the opening of trading of the stock markets on August 1, 2023, EQRx and Revolution Medicines issued a joint press release announcing the execution of the merger agreement.

Recommendation of the Revolution Medicines Board of Directors; Revolution Medicines’ Reasons for the Mergers

At a special meeting held on July 31, 2023, the Revolution Medicines board of directors:

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Accordingly, the Revolution Medicines board of directors recommends that Revolution Medicines stockholders vote “FOR” the Revolution Medicines share issuance proposal and “FOR” the Revolution Medicines adjournment proposal.

In its determinations and in reaching its recommendations, the Revolution Medicines board of directors, as described in the section titled “—Background of the Mergers” of this joint proxy statement/prospectus, held a number of meetings, considered the input of the Revolution Medicines transaction committee which held several meetings, consulted with Revolution Medicines’ senior management and its outside legal and financial advisors, and considered a number of factors and a substantial amount of information, including but not limited to the following factors (not necessarily presented in order of relative importance) that weighed in favor of the mergers.

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The Revolution Medicines board of directors weighed the above factors against a number of potentially negative factors in its deliberations, including but not limited to the following factors (not necessarily presented in order of relative importance):

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The Revolution Medicines board of directors considered all of these factors and, on balance, concluded that the potential benefits of the mergers outweighed the risks and uncertainties of the mergers. Accordingly, the Revolution Medicines board of directors approved the merger agreement, the mergers, the issuance of shares of Revolution Medicines common stock to EQRx equityholders in connection with the mergers and the other transactions contemplated by the merger agreement.

In addition, the Revolution Medicines board of directors was aware of and considered the interests of its directors and executive officers that are different from, or in addition to, the interests of Revolution Medicines stockholders generally described in the section entitled “Interests of Revolution Medicines’ Directors and Executive Officers in the Mergers” of this joint proxy statement/prospectus.

The foregoing discussion of the information and factors that the Revolution Medicines board of directors considered is not intended to be exhaustive, but rather is meant to include the material factors that the Revolution Medicines board of directors considered. The Revolution Medicines board of directors collectively reached the conclusion to approve the mergers, the issuance of shares of Revolution Medicines common stock to EQRx equityholders in connection with the mergers and the other transactions contemplated by the merger agreement in light of the various factors described above and other factors that the members of the Revolution Medicines board of directors believed were appropriate. In view of the complexity and wide variety of factors, both positive and negative, that the Revolution Medicines board of directors considered in connection with its evaluation of the mergers, the Revolution Medicines board of directors did not find it practical, and did not attempt, to quantify, rank or otherwise assign relative or specific weights or values to any of the factors it considered in reaching its decision and did not undertake to make any specific determination as to whether any particular factor, or any aspect of any particular factor, was favorable or unfavorable to the ultimate determination of the Revolution Medicines board of directors. In considering the factors discussed above, individual directors may have given different weights to different factors.

The foregoing description of the Revolution Medicines board of directors’ consideration of the factors supporting the mergers is forward-looking in nature. This information should be read in light of the factors discussed in the section titled “Cautionary Statement Regarding Forward-Looking Statements” of this joint proxy statement/prospectus.

Recommendation of the EQRx Board of Directors; EQRx’s Reasons for the Mergers

At a special meeting held on July 31, 2023, the EQRx board of directors, upon the unanimous recommendation of the EQRx transaction committee:

Accordingly, the EQRx board of directors recommends that EQRx stockholders vote “FOR” adoption of the merger agreement, “FOR” the EQRx compensation proposal, and “FOR” the EQRx adjournment proposal at the EQRx special meeting.

In its determinations and in reaching its recommendations, each of the EQRx board of directors and the EQRx transaction committee, as described in the section titled “—Background of the Mergers” of this joint

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proxy statement/prospectus, held a number of meetings, consulted with EQRx senior management and its outside legal and financial advisors, and considered a number of factors and a substantial amount of information, including, but not limited to, the following factors (not necessarily presented in order of relative importance) that weighed in favor of the mergers:

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The EQRx board of directors and the EQRx transaction committee weighed the above factors against a number of potentially negative factors in their deliberations, including, but not limited to, the following factors (not necessarily presented in order of relative importance):

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In addition, the EQRx board of directors was aware of and considered the interests of its directors and executive officers that may be different from, or in addition to, the interests of EQRx stockholders generally when approving the merger agreement and recommending that EQRx stockholders vote to adopt the merger agreement. For more information, see the section titled “—Interests of EQRx’s Directors and Executive Officers in the Merger.”

The EQRx board of directors and the EQRx transaction committee determined that, overall, these potential risks and uncertainties were outweighed by the benefits expected to be achieved for EQRx stockholders as a result of the mergers. The EQRx board of directors and the EQRx transaction committee realized that there can be no assurance about future results, including results considered or expected as disclosed in the foregoing reasons.

The preceding discussion of the information and factors considered by the EQRx board of directors and the EQRx transaction committee is not, and is not intended to be, exhaustive. In light of the variety of factors considered in connection with their evaluation of the mergers and the complexity of these matters, the EQRx board of directors and the EQRx transaction committee did not find it practicable to, and did not, quantify or otherwise attempt to rank or assign relative weights to the various factors considered in reaching their respective determinations. In considering the factors described above and any other factors, individual members of the EQRx board of directors and the EQRx transaction committee may have viewed factors differently or given different weight, merit or consideration to different factors. In addition, the EQRx board of directors and the EQRx transaction committee did not undertake to make any specific determination as to whether any particular factor, or any aspect of any particular factor, was favorable or unfavorable to the ultimate determination of the EQRx board of directors or the EQRx transaction committee, but rather the EQRx board of directors and the EQRx transaction committee conducted an overall review of the factors described above, including discussions with EQRx senior management and legal and financial advisors.

The foregoing description of the consideration of certain factors by the EQRx board of directors and the EQRx transaction committee is forward-looking in nature. This information should be read in light of the factors discussed in the section titled “Cautionary Statement Regarding Forward-Looking Statements” of this joint proxy statement/prospectus.

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Certain EQRx Unaudited Prospective Financial Information

Although EQRx periodically issues limited financial guidance to investors, EQRx does not as a matter of course publicly disclose financial forecasts or projections as to future revenues or other results of its operations due to, among other reasons, the uncertainty, unpredictability and subjectivity of the underlying assumptions and estimates. However, EQRx senior management has historically prepared and reviewed with the EQRx board of directors standalone financial forecasts for EQRx for use in connection with its strategic planning process and discussions regarding EQRx’s potential business opportunities. At the direction of the EQRx transaction committee and in connection with the evaluation of the proposed transaction with Revolution Medicines or potential alternatives, EQRx senior management prepared an illustrative standalone business case for EQRx that included certain long-range financial forecasts for lerociclib, its early-stage CDK 2 asset, and its legacy assets consisting of aumolertinib and its early-stage immune-inflammatory (I&I) assets (which is referred to as the EQRx standalone business case). The EQRx standalone business case reflected a risk-adjusted outlook and was based on certain assumptions regarding epidemiology, asset-specific probabilities of technical and regulatory success, timing of the clinical development plan, timing of commercial launch, sales ramp, indications to be pursued, market size, market share, peak sales, pricing, expected cash burn rate, relative positioning versus competition, partnering and licensing arrangements, market exclusivity, estimated costs and expenses, and other relevant factors relating to EQRx and these product candidates. The EQRx standalone business case did not include potential future acquisitions of late-stage clinical assets, which the EQRx board of directors and senior management believed would be necessary to consider for the EQRx standalone business case to be viable, because such acquisitions could not be predicted nor could their potential financial impact be quantified. As a result, the EQRx standalone business case is necessarily unreliable and incomplete and, therefore, illustrative only. The EQRx standalone business case should not be viewed as the long-term strategic plan that EQRx would have pursued if EQRx had not entered into the merger agreement, but is being disclosed as part of the mix of information considered by the EQRx transaction committee and the EQRx board of directors in connection with the evaluation of potential strategic alternatives for EQRx. Accordingly, a summary of the EQRx standalone business case is included in this joint proxy statement/prospectus solely because it was provided to the EQRx transaction committee and the EQRx board of directors in connection with their evaluation of potential strategic alternatives for EQRx. The EQRx standalone business case was not provided to Revolution Medicines.

Also, at the direction of the EQRx transaction committee and in connection with the evaluation of the proposed transaction with Revolution Medicines or potential alternatives, EQRx engaged BRG Transaction and Valuation Opinions, LLC (referred to as BRG), an affiliate of Berkeley Research Group, LLC, a consulting firm with a focus on corporate finance advisory services, to prepare an analysis for the EQRx board of directors with respect to EQRx’s estimated value to its stockholders in a liquidation scenario, including an estimate of the net cash that would be available for distribution to EQRx stockholders in connection with any such potential future liquidation (which is referred to as the BRG liquidation analysis). The BRG liquidation analysis was based upon certain information provided to BRG by EQRx and was limited in nature. The BRG liquidation analysis was based on certain assumptions and estimates of BRG regarding asset values, liabilities, potential proceeds from asset sales, wind-down costs and expenses, reserves for contingent liabilities, interest income, taxes, estimates for timing and quantum of distributions to stockholders, and other relevant factors relating to the potential wind-down of EQRx’s operations. The BRG liquidation analysis was not intended to be relied upon as financial advice recommending any particular course of action, and did not, and was not intended to, constitute a fairness or other report, opinion or appraisal, or a financial forecast, with respect to the proposed transaction with Revolution Medicines or any potential alternative, including with respect to the merger consideration to be offered to EQRx stockholders in the proposed transaction with Revolution Medicines. Moreover, while MTS Securities was provided with a copy of the BRG liquidation analysis and provided an opportunity to discuss the analysis with BRG, the BRG liquidation analysis was solely directed to and for the information of the EQRx transaction committee and the EQRx board of directors, and no other parties were entitled to rely on the BRG liquidation analysis. MTS Securities did not rely on the BRG liquidation analysis when rendering its opinion but rather relied on the liquidation analysis provided by EQRx management that included certain results from the BRG liquidation analysis (which is referred to as the EQRx liquidation analysis), as directed by the EQRx

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transaction committee. The results of the BRG liquidation analysis as presented to the EQRx transaction committee on July 26, 2023, and the EQRx liquidation analysis are summarized below. Neither the BRG liquidation analysis nor the EQRx liquidation analysis was provided to Revolution Medicines.

The actual amount of cash available for distribution in a liquidation scenario would depend heavily on the timing of such liquidation and dissolution as well as the amount of cash that would need to be reserved for commitments and contingent liabilities. Moreover, if the mergers are not consummated, the EQRx board of directors intends to consider all strategic paths available to EQRx, including a liquidation of the company, and could decide, for example, to rebuild a pipeline including one or more product candidates through licenses, acquisitions or both, or through consummation of an alternative transaction, instead of liquidating the company.

In addition, as described in the section titled “— Background of the Mergers,” at the direction of the EQRx transaction committee in connection with its evaluation of the proposed transaction with Revolution Medicines, EQRx senior management prepared certain financial projections for Revolution Medicines for fiscal years 2023 through 2042 based on the due diligence conducted with respect to Revolution Medicines and its portfolio of product candidates (which are referred to as the EQRx forecasts for Revolution Medicines). The EQRx forecasts for Revolution Medicines reflected a risk-adjusted outlook and were based on certain assumptions regarding epidemiology, asset-specific probabilities of technical and regulatory success, timing of the clinical development plan, timing of commercial launch, sales ramp, indications to be pursued, market size, market share, peak sales, pricing, expected cash burn rate, relative positioning versus competition, partnering and licensing arrangements, market exclusivity, estimated costs and expenses, effective tax rate, and other relevant factors relating to Revolution Medicines and its product candidates. While senior management of Revolution Medicines provided EQRx with input regarding certain assumptions underlying the EQRx forecasts for Revolution Medicines in connection with due diligence discussions, Revolution Medicines did not provide any management forecasts to EQRx or approve the forecasts prepared by EQRx.

The EQRx standalone business case, the BRG liquidation analysis, the EQRx liquidation analysis and the EQRx forecasts for Revolution Medicines (which are collectively referred to as the EQRx forecasts) were provided to and considered by the EQRx transaction committee and the EQRx board of directors in connection with their respective evaluations of the transactions contemplated by the merger agreement and EQRx’s other strategic alternatives. The EQRx transaction committee directed MTS Securities to use the EQRx forecasts for Revolution Medicines and the EQRx liquidation analysis as described below in its financial analyses and for purposes of its fairness opinion (as summarized above under the section titled “— Opinion of MTS Securities, EQRx’s Financial Advisor”). The EQRx forecasts for Revolution Medicines (together with the related unlevered free cash flows) and the EQRx liquidation analysis were the only financial projections relied upon by MTS Securities in rendering its fairness opinion. MTS Securities also was provided the EQRx standalone business case by EQRx; however, such EQRx standalone business case was only reviewed by MTS Securities and not relied upon by MTS Securities in rendering its fairness opinion.

The summaries of the EQRx forecasts are not being included in this joint proxy statement/prospectus to influence any stockholder’s decision whether to vote for the EQRx merger agreement proposal, the Revolution Medicines share issuance proposal, or for any other purpose. The summaries of the EQRx forecasts are being included in this joint proxy statement/prospectus because the EQRx forecasts were provided to the EQRx transaction committee and the EQRx board of directors in connection with their evaluation of the strategic alternatives available to EQRx, including the transactions contemplated by the merger agreement, and to MTS Securities. The EQRx forecasts may differ from published analyst estimates and, in each instance, do not take into account any events or circumstances after the date they were prepared, including the announcement of the mergers or the commencement of a process by EQRx to wind down its programs.

Each of the EQRx forecasts, although presented with numerical specificity, are necessarily based on numerous variables, estimates and assumptions that are inherently uncertain and many of which are beyond

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EQRx’s or Revolution Medicines’ control. Because the EQRx forecasts cover multiple years, by their nature they will become subject to greater uncertainty with each successive year and are unlikely to anticipate each circumstance that will have an effect on EQRx’s or Revolution Medicines’ business and their respective results of operations. The EQRx standalone business case and EQRx forecasts for Revolution Medicines were prepared by EQRx senior management based on certain estimates and assumptions with respect to general business, economic, competitive, regulatory, reimbursement and other market and financial conditions and other future events, all of which are difficult to predict and many of which are beyond EQRx’s or Revolution Medicines’ control. As a result, there can be no assurance that any of such EQRx forecasts accurately reflect future trends or accurately estimate the future market for Revolution Medicines’ product candidates. The EQRx standalone business case and EQRx forecasts for Revolution Medicines were developed solely using the information available to EQRx senior management at the time they were created and reflect assumptions as to certain business decisions that are subject to change. Important factors that may affect actual results or that may result in any of the EQRx forecasts not being achieved include, but are not limited to: (i) the pursuit or success of preclinical studies and/or clinical trials (including the funding for such studies or trials, anticipated patient enrollment, clinical outcomes, timing or associated costs); (ii) regulatory approvals and related timelines; (iii) the timing of launch of commercial sales of product candidates; (iv) the market acceptance of potential products and product candidates; (v) development of potential products and product candidates for different indications; (vi) risks associated with the development of product candidates in combination with other therapies; (vii) the impact of competitive products and pricing; (viii) the effect of regulatory actions; (ix) the availability of partnering arrangements on favorable terms or at all; (x) the ability to establish and maintain intellectual property protection for products or avoid or defend claims of infringement; (xi) uncertainties in contractual relationships, including collaborations, partnerships, licensing or other arrangements and the performance of third-party suppliers and manufacturers; (xii) the effect of global economic conditions; (xiii) conditions in the financing markets and access to sufficient capital; (xiv) changes in applicable laws, rules and regulations; (xv) accuracy of certain accounting assumptions; (xvi) changes in actual or projected cash flows; (xvii) the impact of EQRx’s wind-down activities on its business operations and prospects; and (xviii) other risk factors described in EQRx’s and Revolution Medicines’ Annual Reports on Form 10-K for the fiscal year ended December 31, 2022, subsequent Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K, as well as the sections titled “Cautionary Statement Regarding Forward-Looking Statements” and “Risk Factors” in this joint proxy statement/prospectus. In addition, the EQRx forecasts may be affected by EQRx’s and/or Revolution Medicines’ ability to achieve their respective strategic goals, objectives and targets over the applicable period. Accordingly, there can be no assurance that any of the EQRx forecasts will be realized, and actual results may vary materially from those shown.

Modeling and forecasting the future development and commercialization of drug candidates by a clinical-stage company is a highly speculative endeavor. In addition to the various limitations described above, there can be no assurance of the approval, or timing of approval, of Revolution Medicines’ product candidates, and it is possible that other therapeutic regimens will be preferable. There also can be no assurance that Revolution Medicines will obtain the regulatory approvals necessary for the commercialization of Revolution Medicines’ product candidates, or that Revolution Medicines’ competitors will not commercialize products that are safer, more effective or more successfully marketed and sold than any product that Revolution Medicines may market or commercialize. Since the EQRx forecasts cover a long period of time, the EQRx forecasts by their nature will not anticipate each circumstance that will have an effect on Revolution Medicines’ or EQRx’s product candidates. The EQRx forecasts were not prepared with a view toward complying with U.S. generally accepted accounting principles, or GAAP, the published guidelines of the SEC or the guidelines established by the American Institute of Certified Public Accountants for preparation or presentation of prospective financial information. The EQRx forecasts included in this document have not been prepared by, and are not the responsibility of, Ernst & Young LLP nor PricewaterhouseCoopers LLP. Neither Ernst & Young LLP nor PricewaterhouseCoopers LLP has audited, reviewed, examined, compiled or applied agreed-upon procedures with respect to the EQRx forecasts and, accordingly, Ernst & Young LLP and PricewaterhouseCoopers LLP do not express an opinion or any other form of assurance with respect thereto. The Ernst & Young LLP and PricewaterhouseCoopers LLP reports incorporated by reference into this document relate to EQRx’s and Revolution Medicines’ previously issued financial statements, respectively. Such reports do not extend to the EQRx forecasts and should not be read to do so.

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The EQRx forecasts were not prepared with a view toward public disclosure. The inclusion of the EQRx forecasts in this joint proxy statement/prospectus should not be regarded as an indication that any of EQRx, Revolution Medicines or any of their respective affiliates, officers, directors, advisors or other representatives considered or consider any of the EQRx forecasts necessarily predictive of actual future events, and none of the EQRx forecasts should be relied upon as such or construed as financial guidance. In addition, analyses relating to the value of EQRx or Revolution Medicines do not purport to be appraisals or reflect the prices at which shares of EQRx or Revolution Medicines common stock may actually be valued or trade, either before or after the consummation of the mergers. None of EQRx, Revolution Medicines or any of their respective affiliates assumes any responsibility for the accuracy of this information. None of EQRx, Revolution Medicines or any of their respective affiliates, advisors, officers, directors or representatives can give any assurance that actual results will not differ from any of the EQRx forecasts. None of EQRx, Revolution Medicines or any of their respective affiliates, advisors, officers, directors or representatives has made or makes any representation or warranty to any EQRx stockholders or Revolution Medicines stockholders regarding the ultimate performance of EQRx or Revolution Medicines compared to the information contained in any of the EQRx forecasts, the likelihood that the EQRx forecasts will be achieved consistent with any of the EQRx forecasts or at all, the results of Revolution Medicines’ preclinical studies or clinical trials, the potential timing and approval of commercial launch of any of Revolution Medicines’ future products, the effectiveness or marketability of Revolution Medicines’ product candidates, or the overall future performance of EQRx or Revolution Medicines. The EQRx forecasts are subjective in many respects and, thus, are subject to interpretation. Accordingly, there can be no assurance that any of the EQRx forecasts will be realized, and actual results may vary materially from those shown.

The EQRx forecasts for Revolution Medicines and the EQRx standalone business case were prepared assuming the applicable company’s continued operation as a standalone, publicly traded company, and therefore do not give effect to the mergers or any changes to the applicable company’s operations or strategy that may be implemented following the consummation of the mergers or to any costs incurred in connection with the mergers, including the effect of any business or strategic decision or action (including, without limitation, the process commenced by EQRx to wind down its programs) that has been or will be taken as a result of the execution of the merger agreement. This section includes a summary of certain key assumptions and does not purport to be a comprehensive overview of all assumptions reflected in each of the EQRx forecasts.

The EQRx forecasts include non-GAAP financial measures such as EBIT (as defined below), NOPAT (as defined below) and unlevered free cash flows. These non-GAAP financial measures should not be considered in isolation from, or as a substitute for, financial information presented in accordance with GAAP, and may not be comparable to similarly titled measures used by other companies. Financial measures included in projections provided to a financial advisor and a board of directors in connection with a business combination transaction are excluded from the definition of “non-GAAP financial measures” under the rules of the SEC, and therefore such financial measures are not subject to SEC rules regarding disclosures of non-GAAP financial measures, which may otherwise require a reconciliation of a non-GAAP financial measure to a GAAP financial measure. Except as included below, reconciliations of non-GAAP financial measures were not provided to and were not relied on by EQRx’s financial advisors, BRG, or the EQRx transaction committee or the EQRx board of directors in connection with its consideration of the mergers. Accordingly, EQRx has not provided a reconciliation of these financial measures included in any of the EQRx forecasts. Amounts in the tables below may not recalculate due to rounding.

Neither EQRx nor Revolution Medicines undertakes any obligation to update or otherwise revise or reconcile any of the EQRx forecasts to reflect circumstances existing after the date such EQRx forecasts were generated or to reflect the occurrence of future events even in the event that any or all of the assumptions underlying such EQRx forecasts are shown to be in error. Neither EQRx nor Revolution Medicines intends to make publicly available any update or other revisions to any of the EQRx forecasts, except as otherwise required by law.

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EQRx Standalone Business Case

In March 2023, EQRx senior management prepared and discussed with the EQRx board of directors a preliminary business scenario focused on lerociclib and its oncology drug discovery targets. This preliminary business scenario was not approved by the EQRx board of directors but instead was prepared by EQRx senior management and reviewed with the EQRx board of directors to facilitate discussion regarding potential strategic paths for EQRx. This preliminary business scenario included risk-adjusted financial forecasts for 2023 through 2035, including estimated annual revenue ranging from $0 to $2.4 billion, estimated annual gross profit ranging from $0 to $2.2 billion, and estimated annual operating income ranging from $(289) million to $1.7 billion. Subsequent to the preparation of this preliminary business scenario, (i) EQRx obtained additional clinical data for lerociclib, which negatively impacted EQRx’s future market opportunities, (ii) EQRx re-prioritized its product candidate portfolio, including the discontinuation of certain clinical studies, (iii) the size of EQRx’s organization was significantly decreased, and (iv) EQRx senior management continued to refine various assumptions underlying the preliminary business scenario in conjunction with resetting its business strategy. The updated assumptions based on these subsequent developments are reflected in the EQRx standalone business case described below.

In July 2023, at the direction of the EQRx transaction committee, EQRx senior management prepared, and discussed with the EQRx transaction committee, the EQRx standalone business case. The EQRx standalone business case was not approved by the EQRx transaction committee or the EQRx board of directors but instead was prepared to facilitate their evaluation of the proposed transaction with Revolution Medicines or potential alternatives. The EQRx standalone business case included selected projected financial information for EQRx for the second half of fiscal year 2023 and fiscal years 2024 through 2040, as prepared by EQRx senior management. The EQRx standalone business case focused on lerociclib, its early-stage CDK 2 asset, and its legacy assets (aumolertinib and its early-stage I&I assets). In particular, the EQRx standalone business case assumed the following: (i) approval of aumolertinib by the European Medicines Agency in 2024 followed by an ex-US partnership arrangement with an upfront payment in 2024 and royalty payments at a net rate of percentages ranging from high single digits to mid-teens thereafter; and (ii) transfer of EQRx’s early-stage I&I assets to a standalone entity in which EQRx would retain a 20% ownership interest and receipt by EQRx of proceeds from the monetization by such entity of one I&I asset in 2027 (estimated $30 million in proceeds to EQRx) and another I&I asset in 2030 (estimated $167.5 million in proceeds to EQRx). As noted above, the EQRx standalone business case did not include potential future acquisitions of late-stage clinical assets, which the EQRx board of directors and management believed would be necessary to consider for the EQRx standalone business case to be viable. As a result, the EQRx standalone business case is necessarily unreliable and incomplete and, therefore, illustrative only.

The risk-adjusted financial forecasts reflected in the EQRx standalone business case for the second half of fiscal year 2023 and fiscal years 2024 through 2040 are summarized below (USD in millions):

As a result of the process subsequently commenced by EQRx to wind down its programs, EQRx may not have any product candidates in active clinical development nor any material research and development collaborations if the proposed mergers were not to be completed. Accordingly, EQRx’s future business prospects

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as a biopharmaceutical company would be limited unless EQRx is able to take steps to hire key personnel and rebuild a pipeline of product candidates through licenses, acquisitions or both, or through consummation of an alternative transaction. The EQRx board of directors also may determine to liquidate or dissolve EQRx and distribute any remaining net cash to EQRx stockholders.

Liquidation Analysis for EQRx

The BRG liquidation analysis represents a range of estimates of EQRx’s aggregate net cash which could be available for distribution to EQRx stockholders in a scenario in which EQRx winds down its operations and liquidates. For purposes of this analysis, such range of estimates of EQRx’s aggregate cash was determined by BRG as follows: estimated net balance sheet liquidation value of EQRx (calculated as total assets minus total liabilities), plus estimated proceeds from assumed asset sales during the wind-down period, less estimated wind-down costs (taking into account a reserve for contingent liabilities), plus estimated interest income during the wind-down period, on a net after-tax basis. The BRG liquidation analysis was subject to certain other assumptions and qualifications, and was based upon information provided to BRG by EQRx as of the date BRG presented its analysis to the EQRx transaction committee on July 26, 2023. The EQRx standalone business case (including the assumed regulatory approvals and transactions referred to therein) and the financial forecasts reflected in the EQRx standalone business case were not made available to BRG prior to BRG’s presentation of the BRG liquidation analysis to the EQRx transaction committee. The timing assumptions underlying the BRG liquidation analysis included: (i) wind-down processes commencing on an assumed date of July 1, 2023; (ii) approval by the EQRx board of directors of a plan of liquidation on an assumed date of August 1, 2023, with EQRx stockholder approval occurring on an assumed date of November 1, 2023; (iii) an assumed initial pre-dissolution liquidating distribution to EQRx stockholders in the amount of $400 million on November 30, 2023; and (iv) the assumed completion of the liquidation and dissolution process and a liquidating distribution of all remaining net cash to EQRx stockholders on June 1, 2025. The BRG liquidation analysis resulted in an estimated range of after-tax liquidation values at June 1, 2025 (i.e., the estimated aggregate available cash for distribution to holders of EQRx common stock as of such date) of $1,124 million in the low case and $1,173 million in the high case prior to calculating the present value of such amounts. Based on the present value using an estimated cost of equity of 8.39%, the estimated range of after-tax liquidation values were $1,014 million (or $2.05 per share) in the low case and $1,057 million (or $2.14 per share) in the high case (assuming approximately 493.7 million fully-diluted shares outstanding as of July 2023, as provided by EQRx). BRG also calculated these values using a risk free rate of 4.06%, which resulted in $2.16 per share in the low case and $2.26 per share in the high case.

Following BRG’s presentation of the BRG liquidation analysis to the EQRx transaction committee, the EQRx transaction committee directed MTS Securities, for purposes of its fairness opinion and related analysis, to use the EQRx liquidation analysis from EQRx management, which included the results of the BRG liquidation analysis prior to calculating the present value of the estimated amounts. The EQRx liquidation analysis included an estimated range of after-tax liquidation values of $1,124 million in the low case and $1,173 million in the high case derived from the BRG liquidation analysis, and an assumption that EQRx made an initial liquidating distribution of $400 million to EQRx stockholders on November 30, 2023, with the remainder of the estimated available net cash being distributed to EQRx stockholders upon completion of the liquidation and dissolution process on an assumed date of June 1, 2025. See the section titled “— Opinion of MTS Securities, EQRx’s Financial Advisor.”

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EQRx Forecasts for Revolution Medicines

Set forth below is a summary of the EQRx forecasts for Revolution Medicines on a standalone, risk-adjusted basis prepared by EQRx senior management, which included selected projected financial information for Revolution Medicines for fiscal years 2023 through 2042 based on EQRx’s due diligence review of Revolution Medicines in connection with a potential transaction. The EQRx forecasts for Revolution Medicines focused on Revolution Medicines’ two lead programs, RMC-6236 (RAS^MULTI) in non-small cell lung cancer (NSCLC) and pancreatic ductal adenocarcinoma (PDAC) and RMC-6291 (KRAS^G12C) in NSCLC, plus Revolution Medicines’ broader platform. Forecasted total revenue included an assumed ex-U.S. commercial partnership with an upfront payment, commercial and development milestone payments, and royalties based on ex-U.S. sales. The risk-adjusted EQRx forecasts for Revolution Medicines for the applicable fiscal years are summarized below (USD in millions):