0001437749-24-010936 4 1 20240401 20240403 20240403 D'Angelo John J 0001611432 4 34 001-36522 24820617 418 PECAN MEADOW DRIVE BATON ROUGE LA 70810 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 D'ANGELO FORM 4 X0508 4 2024-04-01 0001602658 Investar Holding Corp ISTR 0001611432 D'Angelo John J C/O INVESTAR HOLDING CORPORATION 10500 COURSEY BLVD. BATON ROUGE LA 70816 1 1 Chief Executive Officer 0 Common Stock 2024-04-01 4 F 0 2274 16.35 D 203820 D Common Stock 2024-04-01 4 A 0 11001 0 A 214821 D Common Stock 30771 I 401(k) Common Stock 2097 I Minor children Common Stock 250 I Spouse Employee Stock Options 16.35 2024-04-01 4 A 0 19852 0 A 2025-04-01 2034-04-01 Common Stock 19852 19852 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. One-fifth of the options are exercisable on the date indicated and on each of the next four anniversaries thereof. /s/ John J. D'Angelo 2024-04-03