X0508 4 2024-04-25 0001624322 Business First Bancshares, Inc. BFST 0001734796 MCLINDON ANDREW D. 500 LAUREL STREET, SUITE 101 BATON ROUGE LA 70801 1 0 Common Stock 2024-04-25 4 A 0 1149 21.77 A 41814 D Reflects the grant of restricted stock to reporting person. The restricted stock fully vests on April 26, 2025. Includes (a) 1,584 shares of restricted stock granted on May 8, 2023, which vest on May 8, 2024 and (b) 1,149 shares of restricted stock granted on April 25, 2024, which vest on April 26, 2025. /s/ Heather Roemer, as attorney-in-fact for Andrew D. McLindon 2024-04-29