Exhibit 99.1 For Immediate Release ORIGIN BANCORP, INC. REPORTS EARNINGS FOR SECOND QUARTER 2025 Optimize Origin Financial Highlights • Net interest income was $82.1 million for the quarter ended June 30, 2025, reflecting an increase of$3.7 million, or 4.7%, compared to the linked quarter and is at its highest level in the previous nine quarters. 1 • In January 2025, we announced our initiative to drive elite financial performance and enhance our award-winning culture. • Built on three primary pillars: ...