Sec Form 4 Filing - Veneman Ann M @ Icosavax, Inc. - 2024-02-19

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 Veneman Ann M 2. Issuer Name and Ticker or Trading Symbol Icosavax, Inc. [ ICVX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) X __ Other (specify below) See Remarks (Last) (First) (Middle) C/O ICOSAVAX, INC., 1930 BOREN AVE., SUITE 1000 3. Date of Earliest Transaction (MM/DD/YY) 02/19/2024 (Street) SEATTLE, WA98101 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 02/19/2024 U 11,209 D 0 D Common Stock 02/19/2024 D 2,834 ( 2 ) D 0 D

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 Stock Option (Right to Buy) $ 6.25 02/19/2024 D 22,278 ( 3 ) ( 3 ) Common Stock 22,278 ( 3 ) 0 D Stock Option (Right to Buy) $ 9.89 02/19/2024 D 17,000 ( 3 ) ( 3 ) Common Stock 17,000 ( 3 ) 0 D Stock Option (Right to Buy) $ 15 02/19/2024 D 25,500 ( 4 ) ( 4 ) Common Stock 25,500 ( 4 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Veneman Ann M C/O ICOSAVAX, INC. 1930 BOREN AVE., SUITE 1000 SEATTLE, WA98101 See Remarks Signatures /s/ Thomas Russo, Attorney-in-Fact 02/20/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In connection with the terms of an Agreement and Plan of Merger, dated as of December 11, 2023 (the "Merger Agreement"), by and among the Issuer, AstraZeneca Finance and Holdings Inc. ("Parent"), and Isochrone Merger Sub Inc., a wholly owned subsidiary of Parent ("Purchaser"), Purchaser completed a tender offer for shares of the Issuer's Common Stock at a purchase price per share of (i) $15.00 plus (ii) one non-tradable contingent value right ("CVR") per share representing the right to receive a contingent payment of up to $5.00 in cash upon achievement of specified milestones (collectively, the "Offer Price"). After completion of the tender offer, Purchaser merged with and into the Issuer (the "Merger"), effective as of February 19, 2024 (the "Effective Time"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent. ( 2 )Represents restricted stock units ("RSUs"). Pursuant to the Merger Agreement, immediately prior to the Effective Time, each RSU that was outstanding as of immediately prior to the Effective Time was cancelled and converted into the contingent right to receive the Offer Price, subject to the terms of the Merger Agreement. ( 3 )Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time. ( 4 )Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, an amount in cash from Parent, if and when payments in respect of CVRs are required to be made, equal to the product obtained by multiplying (a) the aggregate number of shares underlying such option immediately prior to the Effective Time by (b) the amount by which (1) the sum of $15.00 plus the aggregate amount paid per CVR exceeds (2) the exercise price of such stock option.

Remarks: Former Director

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