X0306 4 2022-04-28 0001624322 Business First Bancshares, Inc. BFST 0001734799 GREER ROBERT S. JR. 500 LAUREL STREET, SUITE 101 BATON ROUGE LA 70801 1 COMMON STOCK 2022-04-28 4 A 0 780 23.08 A 21499 D Reflects the grant of restricted stock to reporting person. The restricted stock fully vests on May 31, 2022. /s/ Heather Roemer, as attorney-in-fact for Robert S. Greer 2022-05-02