X0609 4 2026-04-28 0 0001516912 Origin Bancorp, Inc. OBK 0001345810 D'Agostino James Samuel Jr. false 500 SOUTH SERVICE ROAD EAST RUSTON LA 71270 1 0 0 0 0 Common Stock 2026-04-28 4 A 0 1162 47.35 A 49079 D Common Stock 18131 I See footnote. Represents shares of restricted stock granted to reporting person by the issuer as compensation for service as a director. The shares will vest on the date of the next annual meeting of stockholders following the grant date, unless the next annual meeting of stockholders occurs less than 50 weeks after the grant date in which case the shares will vest on April 28, 2027. Represents shares of common stock held by Houston Trust Company. The reporting person serves as Chairman of the board of directors and on the investment committee of Houston Trust Company and has shared voting and dispositive power over the shares. The reporting person disclaims any beneficial ownership in the shares of common stock held by Houston Trust Company, except to the extent of his pecuniary interest in Houston Trust Company. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities by any reporting person for purposes of Section 16 or for any other purpose. /s/ Drake Mills, as Attorney-in-Fact 2026-04-30