Sec Form 4 Filing - Moore Preston @ Origin Bancorp, Inc. - 2024-02-17

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 Moore Preston 2. Issuer Name and Ticker or Trading Symbol Origin Bancorp, Inc. [ OBK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Credit & Banking Officer (Last) (First) (Middle) 500 SOUTH SERVICE ROAD EAST 3. Date of Earliest Transaction (MM/DD/YY) 02/17/2024 (Street) RUSTON, LA71270 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 02/17/2024 M 798 A 44,256 ( 2 ) D Common Stock 02/17/2024 D( 3 ) 798 D 43,458 ( 2 ) D Common Stock 02/18/2024 M 586 A 44,044 ( 2 ) D Common Stock 12,498 I BY ISSUER RETIREMENT PLAN Common Stock 1,500 I By IRA

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 ( 1 ) 02/17/2024 M 798 ( 4 ) ( 4 ) Common Stock 798 $ 0 1,598 ( 4 ) D Deferred Stock Units ( 5 ) 02/17/2024 A 798 ( 6 ) ( 6 ) Common Stock 798 $ 0 798 ( 6 ) D Restricted Stock Units ( 1 ) 02/18/2024 M 586 ( 7 ) ( 7 ) Common Stock 586 $ 0 586 ( 7 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Moore Preston 500 SOUTH SERVICE ROAD EAST RUSTON, LA71270 Chief Credit & Banking Officer Signatures /s/ Drake Mills, as Attorney-in-Fact 02/21/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units convert into common stock on a one-for-one basis. ( 2 )Includes 973 shares of Common Stock purchased pursuant to the Origin Bancorp, Inc. 2021 Employee Stock Purchase Plan ("ESPP"), for the purchase period of June 01, 2022 to May 31, 2023. ( 3 )In connection with the vesting on February 17, 2024, of 798 restricted stock units ("RSUs") previously granted to the reporting person, all 798 shares of common stock was deferred, resulting in the reporting person's receipt of 798 deferred stock units ("DSUs") pursuant to the issuer's Long Term Equity Deferred Compensation Plan. The reporting person is therefore reporting the disposition of 798 shares of common stock in exchange for an equal number of DSUs. ( 4 )Granted on February 17, 2023, vesting ratably over three years with the first vest date of February 17, 2024. ( 5 )Each DSU represents a right to receive, at settlement, one share of common stock of the issuer. ( 6 )The DSUs become payable in annual installments over five years while in active service, beginning as soon as feasible after June 1, 2028. ( 7 )Granted on February 18, 2022, vesting ratably over three years with the first vest date of February 18, 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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