Sec Form 4 Filing - Auster Martin @ Ventyx Biosciences, Inc. - 2023-01-17

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 Auster Martin 2. Issuer Name and Ticker or Trading Symbol Ventyx Biosciences, Inc. [ VTYX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) C/O VENTYX BIOSCIENCES, INC., 662 ENCINITAS BLVD, SUITE250 3. Date of Earliest Transaction (MM/DD/YY) 01/17/2023 (Street) ENCINITAS, CA92024 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

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) $ 33.84 01/17/2023 A 108,750 ( 1 ) 01/17/2033 Common Stock 108,750 $ 0 108,750 D Restricted Stock Units ( 2 ) 01/17/2023 A 18,125 ( 3 ) ( 3 ) Common Stock 18,125 $ 0 18,125 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Auster Martin C/O VENTYX BIOSCIENCES, INC. 662 ENCINITAS BLVD, SUITE250 ENCINITAS, CA92024 Chief Financial Officer Signatures /s/ Christopher Krueger, as Attorney-in-Fact 01/18/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )One forty-eighth (1/48th) of the total shares subject to the Option shall vest each month following January 17, 2023 (the "Vesting Commencement Date") on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), subject to the reporting person continuing to be a Service Provider, as defined in the Company's 2021 Equity Incentive Plan (the "Plan"), through each such date. ( 2 )Each restricted stock unit ("RSU") represents a contingent right to receive one share of Ventyx Biosciences, Inc. common stock. ( 3 )Twenty-five percent (25%) of the restricted stock units subject to the RSU Award shall vest on the one (1) year anniversary of the RSU Vesting Commencement Date (as defined below), and twenty-five percent (25%) of the total restricted stock units subject to the RSU Award shall vest each year thereafter on each annual anniversary of the RSU Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), subject to the reporting person continuing to be a Service Provider (as defined in the Plan) through each such date. The RSU Vesting Commencement Date shall mean March 28, 2023.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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