Form 4 for ATNI ATN International, Inc.

Accepted 2026-03-19 00:00:00 ET · period of report 2026-03-17 · accession 0001735750-26-000007 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-03-19	2026-03-17	ATNI	Mabey Mary	SVP AND GC	A - Grant	$0.00	+12.6K	66.3K	+24%	$0
D	2026-03-19	2026-03-17	ATNI	Mabey Mary	SVP AND GC	A - Grant	$0.00	+12.6K	12.6K	New	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-03-17	A	A	12,624	$0.00	66,277	D	—	—	(F1) 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 Ms. Mabey will receive a number of shares of common stock equal to the number of restricted stock units that have vested.
2	Derivative	Performance-Based Restricted Stock Units	2026-03-17	A	A	12,624	$0.00	12,624	D	$0.00 · — to —	12,624 Common Stock	(F2) Each performance-based RSU ("PSU") represents a contingent right to receive one share of the Issuer's common stock, subject to 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.