X0508 4 2026-02-20 0 0001516912 Origin Bancorp, Inc. OBK 0001899399 McGee Derek 500 SOUTH SERVICE ROAD EAST RUSTON LA 71270 0 1 0 0 Chief Legal Counsel 0 Common Stock 2026-02-20 4 M 0 1003 A 19438 D Common Stock 2026-02-20 4 F 0 336 43.97 D 19102 D Common Stock 1467 I By IRA Common Stock 661 I BY ISSUER RETIREMENT PLAN Restricted Stock Units 2026-02-20 4 M 0 1003 0 D Common Stock 1003 2004 D Restricted Stock Units 2026-02-20 4 A 0 2843 0 A Common Stock 2843 2843 D Restricted stock units convert into common stock on a one-for-one basis. 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. Granted on February 20, 2025, vesting ratably over three years with the first vest date of February 20, 2026. 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. Granted on February 20, 2026, vesting ratably over three years with the first vest date of February 20, 2027. /s/ Drake Mills, as Attorney-in-Fact 2026-02-24