Sec Form 4 Filing - Mills Drake @ Origin Bancorp, Inc. - 2023-08-18

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 Mills Drake 2. Issuer Name and Ticker or Trading Symbol Origin Bancorp, Inc. [ OBK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chairman, President and CEO (Last) (First) (Middle) 500 SOUTH SERVICE ROAD EAST 3. Date of Earliest Transaction (MM/DD/YY) 08/18/2023 (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 08/18/2023 M 4,126 A 139,337 D Common Stock 08/18/2023 F( 2 ) 1,118 D $ 31.02 138,219 D Common Stock 3,466 I By IRA Common Stock 53,012 I BY ISSUER RETIREMENT PLAN

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 ) 08/18/2023 M 4,126 ( 3 ) ( 3 ) Common Stock 4,126 $ 0 4,126 ( 3 ) D Restricted Stock Units ( 4 ) ( 5 ) ( 5 ) Common Stock 3,112 3,112 ( 5 ) D Performance Stock Units ( 6 ) ( 7 ) ( 7 ) Common Stock 129,735 129,735 ( 7 ) D Restricted Stock Units ( 4 ) ( 8 ) ( 8 ) Common Stock 129,736 129,736 ( 8 ) D Restricted Stock Units ( 4 ) ( 9 ) ( 9 ) Common Stock 5,271 5,271 ( 9 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Mills Drake 500 SOUTH SERVICE ROAD EAST RUSTON, LA71270 X Chairman, President and CEO Signatures /s/ Drake Mills 08/22/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units convert into common stock on a one-for-one basis. ( 2 )Represents the number of common stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the restricted stock units and does not represent a sale. ( 3 )Granted on August 20, 2021, vesting ratably over three years with the first vest date of August 19, 2022. ( 4 )Each restricted stock unit represents the contingent right to receive, at settlement, one share of the issuer's common stock or cash equal to the fair value thereof (calculated pursuant to the incentive agreement), as determined by the issuer. ( 5 )Granted on February 18, 2022, vesting ratably over three years with the first vest date of February 17, 2023. ( 6 )Each performance stock unit represents the contingent right to receive, at settlement, one share of the issuer's common stock or cash equal to the fair value thereof (calculated pursuant to the incentive agreement), as determined by the issuer. ( 7 )The performance stock units ("PSUs") are eligible to vest based on achievement of five pre-established stock price hurdles (each, a "Stock Price Hurdle") during a seven-year performance period beginning on December 13, 2022. Each of the five tranches of PSUs will vest on the later of the date that the applicable Stock Price Hurdle is achieved or the third, fourth, fifth, sixth and seventh anniversaries of the grant date. ( 8 )Granted on December 13, 2022, vest twenty percent on each of the third, fourth, fifth, sixth and seventh anniversaries of the grant date, starting with the first vest date of December 13, 2025, and settle as soon as administratively possible following the applicable vesting date, but in any event within 30 days thereof. ( 9 )Granted on February 17, 2023, vesting ratably over three years with the first vest date of February 17, 2024.

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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