ATN International (ATNI) SVP has 875 shares withheld for tax obligation

Rhea-AI Filing Summary

ATN International senior vice president and general counsel Mary Mabey had 875 shares of common stock withheld by the company at $27.92 per share to cover taxes from vesting restricted stock units. This routine tax-withholding disposition leaves her holding 65,402 shares of common stock directly.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mabey Mary

(Last) (First) (Middle)

C/O ATN INTERNATIONAL, INC.

500 CUMMINGS CENTER, SUITE 2450

(Street)

BEVERLY MASSACHUSETTS 01915

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ATN International, Inc. [ ATNI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP AND GENERAL COUNSEL

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/25/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/25/2026		F(1)		875	D	$27.92	65,402	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents shares withheld by the Company for payment of Ms. Mabey's tax obligation arising from the vesting of previously granted Restricted Stock Units.

	/s/ Mary Mabey	03/27/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ATN International (ATNI) report for Mary Mabey?

ATN International reported a routine tax-related transaction for SVP and general counsel Mary Mabey. The company withheld 875 common shares to cover taxes arising from the vesting of previously granted restricted stock units, rather than an open-market stock sale.

How many ATN International (ATNI) shares were withheld for taxes in this Form 4?

The company withheld 875 shares of ATN International common stock at a price of $27.92 per share. These shares were used to satisfy Mary Mabey’s tax obligation resulting from vesting restricted stock units granted as part of her equity compensation.

Is the ATN International (ATNI) Form 4 for Mary Mabey an open-market stock sale?

No, the Form 4 does not show an open-market sale. It records 875 shares withheld by ATN International to pay Mary Mabey’s tax liability from vesting restricted stock units, a common non-market compensation and tax-settlement mechanism for executives.

How many ATN International (ATNI) shares does Mary Mabey hold after this transaction?

After the tax-withholding disposition, Mary Mabey directly holds 65,402 shares of ATN International common stock. This figure reflects her position following the company’s withholding of 875 shares to satisfy taxes from the vesting of restricted stock units.

What type of equity award triggered the ATN International (ATNI) tax withholding for Mary Mabey?

The tax withholding was triggered by the vesting of previously granted restricted stock units. When these restricted stock units vested, ATN International withheld 875 common shares from Mary Mabey’s award to cover her resulting tax obligation instead of requiring a separate cash payment.