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  4. [Form 4] ATN International, Inc. Insider Trading Activity

ATN International holder sells 7,124 shares

ATNI’s ten percent owner reported indirect open-market sales totaling 7,124 shares around $31 per share and disclosed updated direct and indirect share holdings.

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

ATN International, Inc. (ATNI) reported that ten percent owner Prior Cornelius B. Jr., through an affiliated entity, VI E-Cell Tropical Telecom Ltd, sold 7,124 shares of common stock in open market or private transactions on September 2–3, 2026 at prices around $31 per share. After these transactions, reported holdings include 3,982,303 shares held directly, 500 shares held indirectly by his wife, and 8,227 shares held indirectly through Tropical Aircraft Co.

Positive

  • None.

Negative

  • None.
Insider PRIOR CORNELIUS B JR
Role 10% Owner
Sold 7,124 shs ($221K)
Type Security Shares Price Value
Sale Common Stock 4,542 $31.0177 $141K
Sale Common Stock 2,582 $31.1192 $80K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 30,041 shares (Indirect, By VI E-Cell Tropical Telecom Ltd); Common Stock — 3,982,303 shares (Direct); Common Stock — 500 shares (Indirect, By: Wife); Common Stock — 8,227 shares (Indirect, By Tropical Aircraft Co.)
Shares sold September 3, 2026 4,542 shares Common stock sold indirectly by VI E-Cell Tropical Telecom Ltd at $31.0177 per share
Sale price September 3, 2026 $31.0177 per share Price for 4,542 ATNI common shares sold indirectly
Shares sold September 2, 2026 2,582 shares Common stock sold indirectly by VI E-Cell Tropical Telecom Ltd at $31.1192 per share
Sale price September 2, 2026 $31.1192 per share Price for 2,582 ATNI common shares sold indirectly
Total shares sold 7,124 shares Sum of indirect common stock sales on September 2–3, 2026
Direct holdings after transactions 3,982,303 shares Direct ownership of ATNI common stock reported as of September 2, 2026
Indirect holdings by Wife 500 shares ATNI common stock held indirectly by wife as of September 2, 2026
Indirect holdings by Tropical Aircraft Co. 8,227 shares ATNI common stock held indirectly by Tropical Aircraft Co. as of September 2, 2026
ten percent owner regulatory
"reporting that ten percent owner Prior Cornelius B. Jr. filed this Form 4"
indirect financial
"shares were held indirectly through VI E-Cell Tropical Telecom Ltd"
Common Stock financial
"reported transactions involved ATN International, Inc. Common Stock"
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

What insider activity did ATNI report for Prior Cornelius B. Jr.?
ATN International reported that ten percent owner Prior Cornelius B. Jr., via VI E-Cell Tropical Telecom Ltd, sold 7,124 shares of common stock on September 2–3, 2026 in open market or private transactions at prices around $31 per share.

How many ATNI shares were sold in each transaction?
Two sales were reported: 4,542 shares on September 3, 2026 at $31.0177 per share, and 2,582 shares on September 2, 2026 at $31.1192 per share, all in common stock and held indirectly through VI E-Cell Tropical Telecom Ltd.

Were the reported ATNI share sales made directly by Prior Cornelius B. Jr.?
No. The reported sales of 7,124 shares of ATNI common stock were made indirectly through an affiliated entity, VI E-Cell Tropical Telecom Ltd, as disclosed in the ownership nature for those transactions.

What are Prior Cornelius B. Jr.’s reported direct holdings in ATNI after these transactions?
The filing lists a direct holding of 3,982,303 shares of ATNI common stock as of September 2, 2026, separate from the indirectly held shares reported for related entities and family members.

Is there any indication these ATNI insider sales were under a Rule 10b5-1 plan?
The Rule 10b5-1 checkbox in the filing is not affirmed for these transactions, and no footnote in the provided data states that the reported sales were made under a Rule 10b5-1 trading plan.

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SEC Form 4
FORM 4UNITED 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*
PRIOR CORNELIUS B JR
(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)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/02/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock09/02/2026S2,582D$31.119234,583IBy VI E-Cell Tropical Telecom Ltd
Common Stock09/03/2026S4,542D$31.017730,041IBy VI E-Cell Tropical Telecom Ltd
Common Stock3,982,303D
Common Stock500IBy: Wife
Common Stock8,227IBy Tropical Aircraft Co.
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
/s/ Andy Fienberg , Attorney-in-Fact09/04/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR