ATNI · ATN International, Inc. · Insider Trading

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.70 to $32.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.75 to $31.75, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.5217 to $32.200040, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.10, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

Represents a bona fide gift of 12,000 shares from the reporting person to a non-profit entity.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.10 to $33.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms Lenehan's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms. Henry's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms. Jacobs' 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

Represents shares withheld by the Company for payment of Mr. Hudson's tax obligations.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Mr. Bulkin's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Mr. Hudson's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms. Henry's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.56 to $28.40, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

This Form 4 is being filed late due to inadvertent administrative error.

Represents a bona fide gift of 10,000 shares from the reporting person to a non-profit entity.

This Form 4 is being filed late due to inadvertent administrative error.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.30 to $28.31, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.

This Form 4 is being filed late due to inadvertent administrative error.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.25 to $28.35, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc., 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 ranges set forth in this footnote.