0001437749-24-001749 4 1 20240117 20240119 20240119 Middleton Suzanne O 0001611340 4 34 001-36522 24546137 340 LAKE AVENUE METAIRIE LA 70005 Investar Holding Corp 0001602658 6022 02 Finance 271560715 LA 1231 10500 COURSEY BLVD THIRD FLOOR BATON ROUGE LA 70816 225-227-2222 10500 COURSEY BLVD THIRD FLOOR BATON ROUGE LA 70816 4 1 rdgdoc.xml MIDDLETON FORM 4 X0508 4 2024-01-17 0001602658 Investar Holding Corp ISTR 0001611340 Middleton Suzanne O C/O INVESTAR HOLDING CORPORATION 10500 COURSEY BLVD. BATON ROUGE LA 70816 1 0 Common Stock 2024-01-17 4 A 0 2038 0 A 36836 D Grant of restricted stock units that convert into common stock on a one-for-one basis. Vesting occurs in equal increments on 1/17/2025 and 1/1/2026. /s/ Suzanne O. Middleton 2024-01-19