144/A 0001974078-26-000090 0002106698 XXXXXXXX LIVE 0001624322 Business First Bancshares, Inc. 001-38447 500 LAUREL STREET SUITE 101 BATON ROUGE LA 70801 225-248-7600 Cummings George W. III Director Common Raymond James & Associates

880 Carillon Parkway St. Petersburg FL 33716

11000 302500.00 32810000 03/04/2026 NASDAQ Common 01/01/2026 Merger with Progressive Bancorp, Inc. Issuer N 358775 01/01/2026 Acquired in exchange for 54,114 shares of Progressive Bancorp, Inc. in connection with the merger of Progressive with and into the Issuer. N George W. Cummings III

3269 Deborah Dr Monroe LA 71201

Common 02/25/2026 20000 560056.00 George W. Cummings III

3269 Deborah Dr Monroe LA 71201

Common 03/02/2026 200 5560.00 George W. Cummings III

3269 Deborah Dr Monroe LA 71201

Common 03/03/2025 9800 268760.00 This Form 144/A amends and supersedes the Form 144 filed on March 4, 2026. Table 1 (Securities to be Sold) has been amended. 08/28/2026 /s/ George W. Cummings III