ATN International, Inc. (ATNI)

Data as of Oct 5, 2026, from SEC Form 4 filings.

Net insider selling (90d)Watch ATNI

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Latest ATNI insider trades

Cornelius B. Prior Jr. - 10% Owner
Open-market sale$168K
Aug 21, 2026
Cornelius B. Prior Jr. - 10% Owner
Open-market sale

About ATN International, Inc. (ATNI)

ATN International, Inc. is an SEC registrant, filing under CIK 0000879585, classified as telephone communications (no radiotelephone). We track it alongside the rest of the Communication Services sector.

Sector: Communication Services

SEC filings for ATNI on EDGAR

ATNI Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market sale	31	68,762	$2.16M
Bona-fide gift	3	38,000

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

ATNI insider transactions (Form 4)

39 Form 4 filings on record, the earliest from Apr 7, 2025, newest first. Filing history page 1 of 2.

Date	Insider	Transaction	Security	Shares	Price	Value
Oct 1, 2026	Cornelius B. Prior Jr. - 10% Owner	Gift	Common Stock	13,500	$0.00^{footnote F1}	-
Footnote F1 (price): Represents a bona fide gift of 13,500 shares from the reporting person to a non-profit entity.
Aug 21, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	5,367	$31.32	$168K
Aug 7, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	4,500	$31.03^{footnote F1}	$140K
Sep 4, 2026	Cornelius B. Prior Jr. - 10% Owner	Gift	Common Stock	12,500	$0.00^{footnote F2}	-
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.75 to $31.20, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F2 (price): Represents a bona fide gift of 12,500 shares from the reporting person to a non-profit entity.
Sep 2, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	2,582	$31.12	$80K
Sep 3, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	4,542	$31.02	$141K
Aug 31, 2026	Patricia Jacobs - Director	Open-market sale	Common Stock	1,500	$30.04	$45K
Aug 24, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	10,000	$31.34	$313K
Aug 19, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	10,000	$31.86^{footnote F1}	$319K
Aug 20, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$31.25	$16K
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.70 to $32.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Aug 20, 2026	Patricia Jacobs - Director	Open-market sale	Common Stock	1,000	$31.14	$31K
Aug 17, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	5,745	$31.79^{footnote F1}	$183K
Aug 18, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	1,000	$31.75^{footnote F2}	$32K
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.5217 to $32.200040, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International… Full note on SEC EDGAR Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.75 to $31.75, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Aug 13, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	2,500	$32.05^{footnote F1}	$80K
Aug 14, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	26	$32.10	$835
Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.10, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Aug 10, 2026	Cornelius B. Prior Jr. - 10% Owner	Gift	Common Stock	12,000	$0.00^{footnote F1}	-
Aug 10, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	6,500	$32.49^{footnote F2}	$211K
Aug 10, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$33.25	$17K
Footnote F1 (price): Represents a bona fide gift of 12,000 shares from the reporting person to a non-profit entity. Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.10 to $33.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Aug 10, 2026	Mary Mabey - Officer	Open-market sale	Common Stock	5,000	$32.13	$161K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$28.76	$14K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.50	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$28.80	$14K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.30	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.30	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$28.96	$14K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.30	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$28.95	$14K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.35	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$29.10	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.25	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$29.15	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.35	$15K
Aug 6, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$30.25	$15K
Aug 7, 2026	Cornelius B. Prior Jr. - 10% Owner	Open-market sale	Common Stock	500	$31.17	$16K
Jun 29, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	500	$27.75	$14K
Jun 29, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	1,000	$27.86	$28K
Jun 29, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	1,000	$27.60	$28K
Jun 29, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,000	$27.57	$55K
Jun 29, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	500	$27.52	$14K
Jun 25, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	500	$27.10	$14K
Jun 25, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	500	$27.05	$14K
Jun 26, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	500	$27.10	$14K
Jun 16, 2026	April Henry - Director	Grant or award	Common Stock	4,788	$27.15^{footnote F1}	$130K
Footnote F1 (price): Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms. Henry's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12… Full note on SEC EDGAR
Jun 16, 2026	Patricia Jacobs	Grant or award	Common Stock	4,788	$27.15^{footnote F1}	$130K
Footnote F1 (price): Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms. Jacobs' 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12… Full note on SEC EDGAR
Jun 16, 2026	Bernard J. Bulkin	Grant or award	Common Stock	4,788	$27.15^{footnote F1}	$130K
Footnote F1 (price): Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Mr. Bulkin's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12… Full note on SEC EDGAR
Jun 16, 2026	Derek Hudson	Grant or award	Common Stock	4,788	$27.15^{footnote F1}	$130K
Jun 16, 2026	Derek Hudson	Tax withholding / forfeiture	Common Stock	1,436	$27.15	$39K
Footnote F1 (price): Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Mr. Hudson's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12… Full note on SEC EDGAR
Jun 16, 2026	Pamela F. Lenehan	Grant or award	Common Stock	4,788	$27.15^{footnote F1}	$130K
Footnote F1 (price): Represents fully vested shares of restricted stock grant pursuant to the Issuer's 2023 Equity Incentive Plan in payment of Ms Lenehan's 2026 annual director retainer based on the moving average price for the past twenty days of $27.15 of the Issuer's common stock as of June 12… Full note on SEC EDGAR
Apr 20, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	200,000	$0.00	-
Apr 20, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	200,000	$0.00	-
May 7, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	3,500	$25.54^{footnote F4}	$89K
May 8, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	1,000	$26.25	$26K
May 11, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	5,000	$27.25	$136K
May 14, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,000	$27.25	$55K
May 20, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	3,500	$27.02	$95K
May 21, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,000	$27.25	$55K
May 26, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,854	$27.96^{footnote F5}	$80K
May 27, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	17,500	$28.17^{footnote F6}	$493K
May 27, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	30,000	$0.00	-
May 27, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	30,000	$0.00	-
May 28, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,500	$28.25	$71K
Jun 1, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	12,610	$28.29^{footnote F8}	$357K
Jun 2, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	6,000	$28.30^{footnote F9}	$170K
Jun 3, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	10,000	$0.00	-
Jun 12, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	19,100	$27.96^{footnote F11}	$534K
Jun 11, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,000	$27.30	$55K
May 7, 2026	Cornelius B. Prior Jr.	Open-market sale	Common Stock	2,500	$26.00	$65K
Footnote F4 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.75, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F5 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.87 to $28.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F6 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $28.65, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F8 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.25 to $28.35, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F9 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.30 to $28.31, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR Footnote F11 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.56 to $28.40, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Apr 24, 2026	Naji Khoury - Officer	Grant or award	Common Stock	36,853^{footnote F1}	$0.00	-
Apr 24, 2026	Naji Khoury - Officer	Grant or award	Performance-Based Restricted Stock Units	36,853^{footnote F2}	$0.00	-
Footnote F1 (shares): The securities described are restricted stock units and will vest in four equal installments on each of April 24, 2027, 2028, 2029 and 2030. Upon vesting Mr. Khoury will receive a number of shares of common stock equal to the number of restricted stock units that have vested. Footnote F2 (shares): 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… Full note on SEC EDGAR
Apr 17, 2026	Cornelius B. Prior Jr.	Gift	Common Stock	1,700	$0.00	-
Mar 25, 2026	Michael T. Prior	Tax withholding / forfeiture	Common Stock	2,378	$27.92	$66K
Mar 25, 2026	Mary Mabey - Officer	Tax withholding / forfeiture	Common Stock	875	$27.92	$24K
Mar 25, 2026	Brad W. Martin - Officer	Tax withholding / forfeiture	Common Stock	1,237	$27.92	$35K
Mar 25, 2026	Justin M. Leon - Officer	Tax withholding / forfeiture	Common Stock	560	$27.92	$16K
Mar 17, 2026	Brad W. Martin - Officer	Grant or award	Common Stock	27,048^{footnote F1}	$0.00	-
Mar 17, 2026	Brad W. Martin - Officer	Grant or award	Performance-Based Restricted Stock Units	27,048^{footnote F2}	$0.00	-
Footnote F1 (shares): 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. Footnote F2 (shares): 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… Full note on SEC EDGAR
Mar 17, 2026	Carlos Doglioli - Officer	Grant or award	Common Stock	18,032^{footnote F1}	$0.00	-
Mar 17, 2026	Carlos Doglioli - Officer	Grant or award	Performance - Based Restricted Stock Units	18,032^{footnote F2}	$0.00	-
Footnote F1 (shares): 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. Doglioli will receive a number of shares of common stock equal to the number of restricted stock units that have vested. Footnote F2 (shares): 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… Full note on SEC EDGAR
Mar 17, 2026	Mary Mabey - Officer	Grant or award	Common Stock	12,624^{footnote F1}	$0.00	-
Mar 17, 2026	Mary Mabey - Officer	Grant or award	Performance-Based Restricted Stock Units	12,624^{footnote F2}	$0.00	-
Footnote F1 (shares): 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. Footnote F2 (shares): 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… Full note on SEC EDGAR
Mar 17, 2026	Justin M. Leon - Officer	Grant or award	Common Stock	10,820^{footnote F1}	$0.00	-
Mar 17, 2026	Justin M. Leon - Officer	Grant or award	Performance-Based Restricted Stock Units	10,820^{footnote F2}	$0.00	-
Footnote F1 (shares): 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. Leon will receive a number of shares of common stock equal to the number of restricted stocks units that have vested. Footnote F2 (shares): 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… Full note on SEC EDGAR

Recent ATNI Form 8-K filings

Read ATNI company news

Aug 5, 2026Item 2.02, 8.01, 9.01

Read the filing on SEC EDGAR

Jul 31, 2026Item 5.02, 9.01

Read the filing on SEC EDGAR

Jun 17, 2026Item 5.07

Read the filing on SEC EDGAR

Jun 3, 2026Item 1.01, 2.01, 7.01, 8.01, 9.01

Recent ATNI Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Sep 15, 2026	Prior Family Foundation DTD 6/9/06	Stakeholder	5,000	$155K	View on EDGAR
Aug 24, 2026	Prior Family Foundation DTD 6/9/06	Stakeholder	5,000

ATNI insider trading FAQ

What is the latest insider trade for ATNI?

ATN International, Inc. (ATNI) had 12 insider filings in the last 90 days, with the most recent on 2026-10-05. The full record for ATNI runs to 39 Form 4 filings, the earliest from 2025-04-07. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying ATNI stock?

No insider purchases of ATNI were filed in the last 90 days.

How many insiders are selling ATNI stock?

31 insider sales of ATNI were filed in the last 90 days, totaling $2.16M.

Where can I see ATNI SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects ATNI Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Communication Services companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Oct 5, 2026 - Cornelius B. Prior Jr. view on EDGAR
Sep 18, 2026 - Cornelius B. Prior Jr. view on EDGAR
Sep 4, 2026 - Cornelius B. Prior Jr. view on EDGAR
Sep 2, 2026 - Patricia Jacobs view on EDGAR
Aug 26, 2026 - Cornelius B. Prior Jr. view on EDGAR
Aug 21, 2026 - Cornelius B. Prior Jr. view on EDGAR
Aug 21, 2026 - Patricia Jacobs view on EDGAR
Aug 19, 2026 - Cornelius B. Prior Jr. view on EDGAR
Aug 17, 2026 - Cornelius B. Prior Jr. view on EDGAR

Related companies with recent insider activity

Learn more

Insider selling: signal or noise?: Why most insider sales are routine, and the few patterns worth a second look.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Communication Services: Where ATNI's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Open-market sale

68,762

$2.16M

Bona-fide gift

38,000

Date

Insider

Transaction

Security

Price

Value

Oct 1, 2026

Cornelius B. Prior Jr. - 10% Owner

Gift

Common Stock

13,500

$0.00^{footnote F1}

Footnote F1 (price): Represents a bona fide gift of 13,500 shares from the reporting person to a non-profit entity.

Aug 21, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

5,367

$31.32

$168K

Aug 7, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

4,500

$31.03^{footnote F1}

$140K

Sep 4, 2026

Cornelius B. Prior Jr. - 10% Owner

Gift

Common Stock

12,500

$0.00^{footnote F2}

Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.75 to $31.20, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR
Footnote F2 (price): Represents a bona fide gift of 12,500 shares from the reporting person to a non-profit entity.

Sep 2, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

2,582

$31.12

$80K

Sep 3, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

4,542

$31.02

$141K

Aug 31, 2026

Patricia Jacobs - Director

Open-market sale

Common Stock

1,500

$30.04

$45K

Aug 24, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

10,000

$31.34

$313K

Aug 19, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

10,000

$31.86^{footnote F1}

$319K

Aug 20, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$31.25

$16K

Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.70 to $32.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR

Aug 20, 2026

Patricia Jacobs - Director

Open-market sale

Common Stock

1,000

$31.14

$31K

Aug 17, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

5,745

$31.79^{footnote F1}

$183K

Aug 18, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

1,000

$31.75^{footnote F2}

$32K

Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.5217 to $32.200040, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International… Full note on SEC EDGAR
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.75 to $31.75, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR

Aug 13, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

2,500

$32.05^{footnote F1}

$80K

Aug 14, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

$32.10

$835

Footnote F1 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.10, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR

Aug 10, 2026

Cornelius B. Prior Jr. - 10% Owner

Gift

Common Stock

12,000

$0.00^{footnote F1}

Aug 10, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

6,500

$32.49^{footnote F2}

$211K

Aug 10, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$33.25

$17K

Footnote F1 (price): Represents a bona fide gift of 12,000 shares from the reporting person to a non-profit entity.
Footnote F2 (price): The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.10 to $33.00, inclusive. The reporting person undertakes to provide to ATN International, Inc., any security holder of ATN International, Inc… Full note on SEC EDGAR

Aug 10, 2026

Mary Mabey - Officer

Open-market sale

Common Stock

5,000

$32.13

$161K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$28.76

$14K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.50

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$28.80

$14K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.30

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.30

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$28.96

$14K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.30

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$28.95

$14K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.35

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$29.10

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.25

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$29.15

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.35

$15K

Aug 6, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$30.25

$15K

Aug 7, 2026

Cornelius B. Prior Jr. - 10% Owner

Open-market sale

Common Stock

500

$31.17

$16K

Jun 29, 2026