X0609 4 2026-06-25 0001624322 Business First Bancshares, Inc. BFST 0002106698 Cummings George W. III false 500 LAUREL STREET, SUITE 101 BATON ROUGE LA 70801 1 0 COMMON STOCK 261180 D COMMON STOCK 3911 I By Spouse Restricted Stock Units 0 2026-06-25 4 A 0 998 A Common Stock 998 998 D Reflects the grant of time-based restricted stock units to the reporting person under the Business First Bancshares, Inc. 2024 Equity Incentive Plan on June 25, 2026. The time-based restricted stock units will fully vest on June 25, 2027. Each time-based restricted stock unit is economically equivalent to one share of common stock of the issuer. Under the terms of the relevant restricted stock unit grant, the reported unvested restricted stock units are subject to forfeiture upon the occurrence of certain events. Includes 223,669 pledged shares of common stock of the issuer. /s/ Heather Roemer, as attorney-in-fact for George W. Cummings III 2026-06-29