Exhibit 99.1 500 Laurel Street Baton Rouge, LA 70801 Phone: 877.614.7600 FOR IMMEDIATE RELEASE Misty Albrecht April 25, 2024 b1BANK 225.286.7879 Misty.Albrecht@b1BANK.com Business First Bancshares, Inc., Announces Financial Results for Q1 2024 Baton Rouge, La. (April 25, 2024) – Business First Bancshares, Inc. (NASDAQ: BFST) (Business First), parent company of b1BANK, today announced its unaudited results for the quarter ended March 31, 2024, including net income available to common shareholders of $12.2 mi ...