X0508 4 2026-01-27 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 2026-01-27 4 M 0 26163 14.28 A 266006 D Common Stock 2026-01-27 4 M 0 2907 14.28 A 268913 D Common Stock 2026-01-27 4 S 0 26163 28.01 D 242750 D Common Stock 2026-01-27 4 F 0 1960 28.17 D 240790 D Common Stock 33935 I 401(k) Common Stock 2099 I Minor children Common Stock 250 I Spouse Employee Stock Option 14.28 2026-01-27 4 M 0 26163 0 D 2026-03-01 Common Stock 26163 2907 D Employee Stock Option 14.28 2026-01-27 4 M 0 2907 0 D 2026-03-01 Common Stock 2907 0 D Transaction made pursuant to a trading plan adopted by the Reporting Person on October 28, 2025. Shares were sold pursuant to a trading plan adopted by the Reporting Person on October 28, 2025. The reported price is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $27.87 to $28.30 per share. The Reporting Person undertakes to provide to Investar Holding Corporation, any security holder of Investar Holding Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Sales were undertaken by the Reporting Person for personal estate and tax planning purposes. Represents a "net exercise" of outstanding stock options. The Reporting Person received 947 shares of common stock on net exercise of an option to purchase 2,907 shares of common stock. The Company withheld 1,960 shares of common stock underlying the option to satisfy the exercise price and tax withholding obligations. The option vested in five equal annual installments beginning on March 1, 2017 and is currently exercisable as to all 29,070 shares. /s/ John J. D'Angelo 2026-01-29