PRIOR MICHAEL T 4

What Happened
Michael T. Prior, Executive Chairman and Director of ATN International (ATNI), had a total of 6,877 shares disposed through withholding to satisfy tax obligations from vested restricted stock units (RSUs). The company withheld 2,191 shares on 2026-03-12 at $24.65 ($54,008) and 4,686 shares on 2026-03-13 at $24.49 ($114,760), for a combined value of approximately $168,768. These were tax-withholding disposals (not open-market sales).

Key Details

• Transaction dates and prices:
  • 2026-03-12: 2,191 shares withheld @ $24.65 — $54,008
  • 2026-03-13: 4,686 shares withheld @ $24.49 — $114,760
• Total shares withheld: 6,877; total value ≈ $168,768.
• Shares owned after the transactions: not disclosed in the provided filing.
• Footnotes: F1 — shares were withheld by the company to satisfy Mr. Prior’s tax obligation arising from the vesting of previously granted RSUs. F2 refers to an existing footnote (1) in the filing.
• Filing timeliness: Form filed 2026-03-27 for transactions on 2026-03-12 and 2026-03-13 — the filing appears late relative to the usual 2-business-day Form 4 reporting requirement.

Context
Withholding shares to cover taxes on vested RSUs is a routine administrative action and differs from an open-market sale that might signal an insider’s view of the stock. This transaction reflects tax withholding on compensation-related vesting rather than a discretionary trade; retail investors should treat it as administrative rather than a directional insider buy/sell signal.