Sec Form 4 Filing - Cochran Jennifer R. @ OmniAb, Inc. - 2023-06-23

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 Cochran Jennifer R. 2. Issuer Name and Ticker or Trading Symbol OmniAb, Inc. [ OABI] 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) 5980 HORTON STREET, STE 600 3. Date of Earliest Transaction (MM/DD/YY) 06/23/2023 (Street) EMERYVILLE, CA94608 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 91,190 ( 1 ) 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 Restricted Stock Units ( 2 ) ( 2 ) ( 2 ) Common Stock 3,792 3,792 ( 1 ) D Restricted Stock Units ( 3 ) 06/23/2023 A 20,000 ( 3 ) ( 3 ) Common Stock 20,000 $ 0 23,792 D Stock Option (right to buy) $ 4.81 06/23/2023 A 40,000 ( 4 ) 06/23/2033 Common Stock 40,000 $ 0 40,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Cochran Jennifer R. 5980 HORTON STREET, STE 600 EMERYVILLE, CA94608 X Signatures By: /s/ Charles S. Berkman For: Jennifer R. Cochran 06/27/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The Reporting Person previously reported certain awards of Restricted Stock Units (RSUs) in Table I of Form 4, but has elected to report the RSUs in Table II goingforward. As a result, the total reported in Column 5 of Table I has been updated to subtract 3,792 RSUs outstanding on June 23, 2023. ( 2 )Represents RSUs previously reported in Table I. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. Vesting occurs in two equalannual installments, beginning July 12th, 2023, subject to the Reporting Person's continued service to the Issuer through each such vesting date. ( 3 )Each Restricted Stock Unit (RSU) represents a contingent right to receive one share of the Issuer's Common Stock. The RSUs shall vest in full on the earlier of (A) thedate of the next annual meeting of the Company's stockholders following the grant date and (B) the first anniversary of the date of grant. ( 4 )Each Stock Option shall vest and become exercisable in full on the earlier of (A) the date of the annual meeting of the Company's stockholders next following the grantdate and (B) on the first anniversary of the date of grant.

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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