X0508 4 2024-03-31 0001624322 Business First Bancshares, Inc. BFST 0001955172 Vascocu Norman Jerome Jr 500 LAUREL STREET, SUITE 101 BATON ROUGE LA 70801 1 EVP, CAO of b1Bank 0 COMMON STOCK 2024-03-31 4 F 0 2554 22.28 D 24888 D Consists of (a) 5,500 shares of unvested restricted stock granted on 2/1/2023 which will vest on 3/31/2025, and (b) 7,442 shares of unvested restricted stock granted on 2/1/2024, of which 3,666 shares will vest on 3/31/2025, and the remaining 3,776 shares will vest on 3/31/2026. Under the terms of the relevant restricted stock grants, the reported shares of unvested restricted stock are subject to forfeiture upon the occurrence of certain events. /s/ Heather Roemer, as attorney-in-fact for Norman Jerome Vascocu, Jr. 2024-04-02