0001437749-23-005364 4 1 20230301 20230303 20230303 Campbell John R 0001964039 4 34 001-36522 23703649 10500 COURSEY BOULEVARD BATON ROUGE LA 70816 Investar Holding Corp 0001602658 6022 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 CAMPBELL FORM 4 X0306 4 2023-03-01 0001602658 Investar Holding Corp ISTR 0001964039 Campbell John R C/O INVESTAR HOLDING CORPORATION 10500 COURSEY BLVD. BATON ROUGE LA 70816 1 Chief Financial Officer Common Stock 2023-03-01 4 A 0 3814 0 A 3814 D Grant of restricted stock units that convert into common stock on a one-for-one basis. Vesting occurs in equal increments on the anniversary dates for the following five years. /s/ John R. Campbell 2023-03-03