ATN SVP has 2,574 ATNI shares withheld for taxes

ATN International, Inc. senior vice president of corporate development Justin M. Leon reported routine share dispositions related to tax withholding.

Rhea-AI Filing Summary

ATN International, Inc. senior vice president of corporate development Justin M. Leon reported routine share dispositions related to tax withholding. On March 12, 2026, the company withheld 903 shares of common stock at $24.65 per share to cover taxes from vesting restricted stock units. On March 13, 2026, an additional 1,671 shares were withheld at $24.49 per share for the same purpose. Following the March 13 transaction, Mr. Leon directly held 39,447 shares of ATN International common stock.

Insider Trade Summary

Exercise Price or Tax Liability: 2,574 shares

Exercise Price or Tax Liability 2 txns

Insider Leon Justin M

Role SVP, CORPORATE DEVELOPMENT

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	1,671	$24.49	$41K
Exercise Price or Tax Liability	Common Stock	903	$24.65	$22K

Holdings After Transaction: Common Stock — 39,447 shares (Direct)

Footnotes (2)

1. F1. Represents shares withheld by the Company for payment of Mr. Leon's tax obligation arising from the vesting of previously granted Restricted Stock Units.
2. F2. Refer to existing footnote (1)

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did ATNI SVP Justin Leon report on this Form 4?

Justin M. Leon reported two dispositions where ATN International withheld a total of 2,574 common shares to pay tax obligations from vesting restricted stock units, on March 12 and 13, 2026, rather than open-market stock sales.

How many ATNI shares were withheld for Justin Leon’s tax obligations?

A total of 2,574 ATN International common shares were withheld for taxes. This consisted of 903 shares on March 12, 2026 and 1,671 shares on March 13, 2026, all tied to vesting restricted stock units.

Were Justin Leon’s ATNI Form 4 transactions open-market sales?

No, the Form 4 classifies both transactions with code F, meaning shares were withheld by ATN International to satisfy tax liabilities from vesting restricted stock units, not discretionary open-market stock sales by Justin M. Leon.

What is Justin Leon’s ATNI share ownership after these tax withholdings?

After the March 13, 2026 tax-withholding disposition, Justin M. Leon directly held 39,447 shares of ATN International common stock, as reported in the Form 4’s post-transaction ownership field for his non-derivative holdings.

What role does Justin Leon hold at ATN International (ATNI)?

Justin M. Leon is identified as an officer of ATN International, Inc. with the title SVP, Corporate Development. The Form 4 indicates he is not a director and not a ten percent beneficial owner of the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/16/2026 - 05:36 PM EDT Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Leon Justin M

(Last) (First) (Middle)

500 CUMMINGS CENTER

SUITE 2450

(Street)

BEVERLY MA 01915

(City) (State) (Zip)

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, CORPORATE DEVELOPMENT

3. Date of Earliest Transaction (Month/Day/Year)
03/12/2026

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

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

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

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	03/12/2026		F(1)		903	D	$24.65	41,118	D
Common Stock	03/13/2026		F(2)		1,671	D	$24.49	39,447	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 Mr. Leon's tax obligation arising from the vesting of previously granted Restricted Stock Units.

2. Refer to existing footnote (1)

	/s/ Andy Fienberg, Attorney-in-Fact	03/16/2026
	** 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.