ISTR · Investar Holding Corp

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.

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.

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.

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.

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.

Transaction made pursuant to a trading plan adopted by the Reporting Person on October 28, 2025.

The option vested in five equal annual installments beginning on March 1, 2017 and is currently exercisable as to all 29,070 shares.

Transaction made pursuant to a trading plan adopted by the Reporting Person on October 28, 2025.

The option vested in five equal annual installments beginning on March 1, 2017 and is currently exercisable as to all 29,070 shares.

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.

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.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Includes shares acquired pursuant to dividend reinvestment and not previously reported pursuant to Rule 16a-11.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

Includes shares acquired pursuant to dividend reinvestment and not previously reported pursuant to Rule 16a-11.

Grant of restricted stock units ("RSUs") that convert into common stock on a one-for-one basis. Twenty percent of the RSUs will vest on 1/21/2027 and the remaining RSUs will vest in four substantially equal annual installments beginning on 1/1/2028.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

The conversion price of the Series A Noncumulative Perpetual Convertible Preferred Stock is fixed, but is subject to adjustment upon the occurrence of certain events as set forth in the Articles of Amendment to the Issuer's Articles of Incorporation designating the Series A Noncumulative Perpetual Convertible Preferred Stock.

The preferred stock is perpetual and therefore has no expiration date.

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.

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.

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.