Sec Form 4 Filing - Heyman Richard A. @ Enliven Therapeutics, Inc. - 2023-02-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Heyman Richard A. 2. Issuer Name and Ticker or Trading Symbol Enliven Therapeutics, Inc. [ ELVN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O ENLIVEN THERAPEUTICS, INC., 6200 LOOKOUT ROAD 3. Date of Earliest Transaction (MM/DD/YY) 02/23/2023 (Street) BOULDER, CO80301 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/23/2023 A 149,820 A 149,820 D Common Stock 02/23/2023 A 37,407 A 37,407 I See footnote ( 2 ) Common Stock 02/23/2023 A 31,172 A 31,172 I See footnote ( 3 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option (right to buy) $ 2.48 02/23/2023 A 20,657 ( 4 ) 08/12/2032 Common Stock 20,657 ( 5 ) 20,657 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Heyman Richard A. C/O ENLIVEN THERAPEUTICS, INC. 6200 LOOKOUT ROAD BOULDER, CO80301 X Signatures /s/ Galya Blachman, by power of attorney 02/27/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger, dated as of October 13, 2022 (the "Merger Agreement"), by and among Imara Inc. ("Imara"), Enliven Therapeutics, Inc., ("Enliven") and Iguana Merger Sub, Inc., a wholly owned subsidiary of the Issuer (the "Merger Sub"), which provided for the merger of Merger Sub with and into Enliven, with Enliven surviving the merger as a wholly-owned subsidiary of Imara (the "Merger"). At the effective time of the Merger, each share of Enliven common stock was converted into the right to receive a number of shares of Imara common stock equal to an exchange ratio of approximately 0.2951 shares of Imara common stock for each share of Enliven common stock. After completion of the Merger, the combined company will be renamed "Enliven Therapeutics, Inc." and the common stock of the combined company will trade on The Nasdaq Stock Market under the symbol "ELVN." ( 2 )The shares held of record by the Richard A. Heyman and Anne E. Daigle Trust, dated November 1, 2016 for which the reporting person serves as trustee. ( 3 )The shares held of record by RAHD Capital LLC for which the reporting person serves as a managing member. ( 4 )The option is subject to an early exercise provision and the shares underlying the option vest in 48 equal monthly installments beginning on January 14, 2021. ( 5 )In connection with the Merger, each Enliven stock option that was outstanding immediately prior to the effective time of the Merger was assumed by Imara and became an option to acquire, on the same terms and conditions as were applicable to such Enliven stock option immediately prior to the effective time of the Merger, a number of shares of Imara common stock equal to the number of shares of Enliven common stock subject to the unexercised portion of the Enliven stock option immediately prior to the effective time of the Merger, multiplied by the exchange ratio (rounded down to the nearest whole share number), with an exercise price per share for the options equal to the exercise price per share of such Enliven stock option immediately prior to the effective time of the Merger divided by the exchange ratio (rounded up to the nearest whole cent).

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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