Mary Mabey - 07 Mar 2026 Form 4 Insider Report for ATN International, Inc. (ATNI)

Role
SVP AND GENERAL COUNSEL
Signature
/s/ Mary Mabey
Issuer symbol
ATNI
Transactions as of
07 Mar 2026
Net transactions value
$0
Form type
4
Filing time
10 Mar 2026, 16:09:45 UTC
Previous filing
09 Apr 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Mabey Mary SVP AND GENERAL COUNSEL C/O ATN INTERNATIONAL, INC., 500 CUMMINGS CENTER, SUITE 2450, BEVERLY /s/ Mary Mabey 10 Mar 2026 0001735750

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction ATNI Common Stock Options Exercise +3,828 +6.9% 59,691 07 Mar 2026 Direct F1, F2
transaction ATNI Common Stock Tax liability -1,900 -3.2% $24.18* 57,791 07 Mar 2026 Direct F3
transaction ATNI Common Stock Tax liability -819 -1.4% $24.18* 56,972 07 Mar 2026 Direct F4

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction ATNI Performance-Based Restricted Stock Units Options Exercise -6,600 -100% $0.000000* 0 07 Mar 2026 Common Stock 6,600 $0.000000 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Common stock issued upon vesting of performance-based RSU ("PSU") based on 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 trading days of the applicable performance period, which ended on March 7, 2026. The aggregate number of shares issued is 58% of the target number of PSU shares previously reported.
F2 Refer to existing footnote (1).
F3 Represents shares withheld by the Company for payment of Ms. Mabey's tax obligation arising from the vesting of previously granted Performance Stock Units in the existing footnote (1).
F4 Represents shares withheld by the Company for payment of Ms. Mabey's tax obligation arising from the vesting of previously granted Restricted Stock Units.