Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b). Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

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 (Month/Day/Year) 06/17/2026 (Street) RUSTON, LA 71270 4. If Amendment, Date Original Filed (Month/Day/Year) 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 (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 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 06/17/2026 M 25,947 A (1)(2) 196,640 D Common Stock 06/17/2026 F(3) 10,338 D $48.71 186,302 D Common Stock 3,866 I By IRA Common Stock 58,763 I BY ISSUER RETIREMENT PLAN

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

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 (Month/Day/Year)

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

Performance Stock Units

(1)

06/17/2026

M

25,947

(2)

(4)

Common Stock

25,947

$ 0

103,788(4)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mills Drake 500 SOUTH SERVICE ROAD EAST RUSTON, LA 71270	X		Chairman, President and CEO

Signatures

/s/ Drake Mills		06/18/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Performance stock units ("PSUs) convert into common stock on a one-for-one basis.
(2)	The PSUs vested upon the achievement of the applicable stock price hurdle, defined as the closing price per share exceeding $46.25 for any twenty (20) consecutive trading day period during the performance period and the reporting person's continuous employment through December 13, 2025.
(3)	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 PSUs and does not represent a sale.
(4)	The remaining PSUs are eligible to vest based on achievement of four pre-established stock price hurdles (each, a "Stock Price Hurdle") during a seven-year performance period beginning on December 13, 2022. Each of the four tranches of PSUs will vest on the later of the date that the applicable Stock Price Hurdle is achieved or the fourth, fifth, sixth and seventh anniversaries of the grant date.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.