PRIOR MICHAEL T 4

4 · ATN International, Inc. · Filed Mar 27, 2026

AI-generated summary of this filing

Updated Mar 27, 2026

ATN (ATNI) Exec. Chairman Michael T. Prior Receives Equity Award

What Happened

Michael T. Prior, Executive Chairman and Director of ATN International (ATNI), received equity awards on March 17, 2026: 13,524 restricted stock units (RSUs) and 13,524 performance-based RSUs (PSUs). The Form 4 reports $0 acquisition price for these grants (typical for awards).
The RSUs vest in four equal annual installments on March 17 of 2027, 2028, 2029 and 2030. The PSUs are performance-contingent and may payout between 0% and 150% of target depending on relative total shareholder return (TSR) versus the Russell 2000 for the performance period.

Key Details

Transaction date: 2026-03-17; Form 4 filed: 2026-03-27 (filed 10 days after the grant; later than the usual 2-business-day Form 4 deadline).
Grants: 13,524 RSUs (time-based) + 13,524 PSUs (performance-based). Reported price/value: $0.
PSU performance period: March 17, 2026 – March 17, 2029; payout range 0%–150% of target (0 to 20,286 shares possible from the PSUs).
Vesting schedule for RSUs: four equal installments (2027–2030).
Shares owned after the transaction were not included in the provided extract.
Footnotes: F1 describes RSU vesting schedule; F2–F3 explain PSU TSR benchmarking to the Russell 2000 and payout range.
Filing timeliness: The Form 4 was filed 10 days after the grant date — outside the typical 2-business-day window — which investors may note when assessing reporting practices.

Context

These are equity awards (not open-market purchases or sales); they do not represent an immediate cash transaction or sale of shares. PSUs are conditional — payout depends on ATN’s relative TSR versus the Russell 2000 over the stated performance period.
For retail investors, grants are disclosures of potential future insider ownership rather than direct bullish/bearish trading signals. Late filing can affect the timeliness of public disclosure but does not, by itself, indicate the substance of the award.

Form 4

Period: 2026-03-17

DirectorOther

Transactions

Award
Common Stock
[F1]
2026-03-17+13,524→ 590,051 total
Award
Performance-Based Restricted Stock Units
[F2][F3]
2026-03-17+13,524→ 13,524 total
Exercise: $0.00→ Common Stock (13,524 underlying)

Holdings

Footnotes (3)

[F1]The securities described are restricted stock units and will fest in four equal installments on each of March 17, 2027, 2028, 2029 and 2030. Upon vesting Mr. Prior will receive a number of shares of common stock equal to the number of restricted stocks units that have vested.
[F2]Each performance-based RSU ("PSU") represents a contingent right to receive one share of the Issuer's common stock, subject to the achievement of pre-established relative total shareholder return ("TSR") goals that were set by the Compensation Committee of the Issuer's Board of Directors, based on comparing the Issuer's TSR relative to the TSR of the Russell 2000 Index, using the average closing price of the shares for the 40 days before and including each of the first and last days of the applicable performance period. The aggregate number of shares issued may range from zero (0) shares to 150% of the target number of shares reported in columns 7 and 9 of this report.
[F3]Between zero (0) and 150% of the PSUs will generally vest, if at all, as of the end of the performance period that begins on March 17, 2026, and ends on March 17, 2029.

Signature

/s/ Michael T. Prior|2026-03-27

1 file