STOCK TITAN

ATN International (NASDAQ: ATNI) 10% owner sells 10,500 shares

(Moderate)
(Negative)
Form Type
4

Rhea-AI Filing Summary

ATN International, Inc. (ATNI) reported that reporting person Cornelius B. Prior Jr., a ten percent owner, indirectly sold a total of 10,500 shares of common stock in open-market or private transactions on August 19–20, 2026 through VI E-Cell Tropical Telecom Ltd at prices around $31–$32 per share. Holdings reported after these transactions include 3,982,303 shares held directly, and additional indirect holdings of 500 shares held by his wife and 8,227 shares held by Tropical Aircraft Co.

Positive

  • None.

Negative

  • None.
Insider PRIOR CORNELIUS B JR
Role 10% Owner
Sold 10,500 shs ($334K)
Type Security Shares Price Value
Sale Common Stock 500 $31.25 $16K
Sale Common Stock F1 10,000 $31.8617 $319K
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 47,165 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.)
Footnotes (1)
  1. F1. 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., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
Shares sold August 19, 2026 10,000 shares of Common Stock Indirect sale by VI E-Cell Tropical Telecom Ltd
Weighted average price August 19 sale $31.8617 per share Multiple transactions at prices from $31.70 to $32.00, inclusive
Shares sold August 20, 2026 500 shares of Common Stock Indirect sale by VI E-Cell Tropical Telecom Ltd
Price August 20 sale $31.25 per share Open-market or private sale of 500 shares
Direct holdings after transactions 3,982,303 shares of Common Stock Reported as directly owned by the reporting person
Indirect holdings via wife 500 shares of Common Stock Reported as held indirectly, "By: Wife"
Indirect holdings via Tropical Aircraft Co. 8,227 shares of Common Stock Reported as held indirectly, "By Tropical Aircraft Co."
Net shares sold 10,500 shares Net sell direction across reported transactions
ten percent owner regulatory
"reporting person Cornelius B. Prior Jr., a ten percent owner"
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
indirect ownership regulatory
"direct_or_indirect" : "I", "ownership_type" : "indirect""
open market or private transaction financial
"transaction_code_description": "Sale in open market or private transaction""

FAQ

What insider transactions were reported for ATNI in this Form 4?

The filing reports that Cornelius B. Prior Jr., a ten percent owner, indirectly sold 10,500 shares of ATN International, Inc. common stock on August 19–20, 2026 through VI E-Cell Tropical Telecom Ltd in open-market or private transactions.

How many ATNI shares did the insider sell and at what prices?

The insider, through VI E-Cell Tropical Telecom Ltd, sold 10,500 shares of ATNI common stock: 10,000 shares at a weighted average price of $31.8617 and 500 shares at $31.25 per share.

Were the ATNI sales made in multiple transactions or a single trade?

The sale of 10,000 shares on August 19, 2026 was executed in multiple transactions at prices ranging from $31.70 to $32.00 per share, reported as a weighted average price. The 500-share sale on August 20, 2026 is reported at $31.25 per share.

What are Cornelius B. Prior Jr.’s reported ATNI holdings after these transactions?

Reported holdings after the transactions are 3,982,303 ATNI common shares held directly, plus indirect holdings of 500 shares held by his wife and 8,227 shares held by Tropical Aircraft Co., as disclosed in the holding entries.

How were the ATNI shares held that were sold in this Form 4?

The 10,500 shares sold were held indirectly, noted as “By VI E-Cell Tropical Telecom Ltd.” The transactions are coded as open-market or private sales of ATN International, Inc. common stock.

Was a Rule 10b5-1 trading plan used for these ATNI insider sales?

The document-level Rule 10b5-1 checkbox is not affirmed (marked false), and the footnotes do not state that these transactions were made pursuant to a Rule 10b5-1 trading plan.

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

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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)
08/19/2026
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 Stock08/19/2026S10,000D$31.8617(1)47,665IBy VI E-Cell Tropical Telecom Ltd
Common Stock08/20/2026S500D$31.2547,165IBy 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:
1. 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., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.
/s/ Andy Fienberg , Attorney-in-Fact08/21/2026
** 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)