ATN International (NASDAQ: ATNI) CEO awarded 27,048 PSUs tied to TSR

Rhea-AI Filing Summary

Martin Brad W reported acquisition or exercise transactions in this Form 4 filing.

ATN International CEO Brad W. Martin received new equity awards linked to the company’s stock. On March 17, 2026, he was granted 27,048 performance-based restricted stock units, each tied to one share of common stock, and a related award of 27,048 shares of common stock, both at no cash cost.

The restricted stock units will vest in four equal installments on March 17, 2027, 2028, 2029 and 2030. The performance-based units can pay out between zero and 150% of the 27,048 target shares, based on ATN’s total shareholder return versus the Russell 2000 Index over the performance period from March 17, 2026 to March 17, 2029. After these grants, Martin directly holds 127,366 shares of common stock.

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^*

Martin Brad W

(Last) (First) (Middle)

C/O ATN INTERNATIONAL, INC.

500 CUMMINGS CENTER

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF EXECUTIVE OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

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	03/17/2026		A		27,048(1)	A	$0	127,366	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
Performance-Based Restricted Stock Units	$0	03/17/2026		A		27,048(2)		(3)	(3)	Common Stock	27,048	$0	27,048	D

Explanation of Responses:

1. The securities described are restricted stock units and will vest in four equal installments on each of March 17, 2027, 2028, 2029 and 2030. Upon vesting, Mr. Martin will receive a number of shares of common stock equal to the number of restricted stock units that have vested.

2. 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.

3. 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.

	/s/ Brad W. Martin	03/19/2026
	** 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.
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* Form 4: SEC 1474 (03-26)

FAQ

What equity awards did ATNI CEO Brad W. Martin receive in this Form 4?

Brad W. Martin received 27,048 performance-based restricted stock units and a related award of 27,048 shares of common stock at no cash cost. These equity grants are part of his compensation and are tied to future service and performance conditions over several years.

How do the performance-based RSUs for ATNI’s CEO vest and convert to shares?

Each performance-based RSU represents a contingent right to one share of ATN common stock. Between zero and 150% of the 27,048 target units may vest based on relative total shareholder return performance, after which vested units convert into common shares for the executive.

What performance metrics determine ATNI CEO Brad Martin’s PSU payout?

The PSU payout depends on ATN’s total shareholder return versus the Russell 2000 Index. Performance is measured using average closing prices over specified 40-day windows at the start and end of the period, with payout ranging from zero to 150% of the target 27,048 units.

Over what period is ATNI’s performance measured for these CEO PSUs?

The performance period for the PSUs begins on March 17, 2026, and ends on March 17, 2029. Vesting generally occurs at the end of this period, based on total shareholder return performance relative to the Russell 2000 Index during that timeframe.

What is the time-based vesting schedule for ATNI CEO Brad Martin’s restricted stock units?

The restricted stock units vest in four equal installments on March 17, 2027, March 17, 2028, March 17, 2029, and March 17, 2030. Upon each vesting date, Martin receives a number of common shares equal to the vested restricted stock units for that installment.

How many ATNI common shares does CEO Brad Martin hold after these grants?

Following the March 17, 2026 common stock award of 27,048 shares, Brad W. Martin directly holds 127,366 shares of ATN common stock. This total reflects his updated direct ownership position as reported after the grant transaction in the Form 4 filing.