ATN International holder sells 2,526 shares at $32

ATN International, Inc. (ATNI) reporting person Cornelius B. Prior Jr., a ten percent owner, reported indirect open-market sales of common stock totaling 2,526 shares on August 13–14, 2026 at prices around $32 per share.

Rhea-AI Filing Summary

ATN International, Inc. (ATNI) reporting person Cornelius B. Prior Jr., a ten percent owner, reported indirect open-market sales of common stock totaling 2,526 shares on August 13–14, 2026 at prices around $32 per share. A weighted average price footnote applies to the 2,500-share sale, which occurred in multiple trades between $32.00 and $32.10. Following these transactions, reported holdings include 3,982,303 shares held directly and additional indirect holdings through related entities and a spouse.

Insider Trade Summary

Net Seller: 2,526 shares

Net Sell 5 txns

Insider PRIOR CORNELIUS B JR

Role 10% Owner

Sold 2,526 shs ($81K)

Type	Security	Shares	Price	Value
Sale	Common Stock	26	$32.10	$834.60
Sale	Common Stock F1	2,500	$32.05	$80K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 64,410 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 $32.00 to $32.10, 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.

Key Figures

Shares sold August 14, 2026: 26 shares Price August 14, 2026 sale: $32.10 per share Shares sold August 13, 2026: 2,500 shares +5 more

8 metrics

Shares sold August 14, 2026 26 shares Indirect sale of ATNI common stock at $32.10 per share

Price August 14, 2026 sale $32.10 per share Price for 26-share indirect sale of ATNI common stock

Shares sold August 13, 2026 2,500 shares Indirect sale of ATNI common stock at weighted average price

Weighted average price range $32.00–$32.10 per share Price range for the 2,500-share sale on August 13, 2026

Total shares sold 2,526 shares Sum of indirect ATNI common stock sales on August 13–14, 2026

Direct holdings after transactions 3,982,303 shares ATNI common stock held directly by the reporting person

Indirect holdings by wife 500 shares ATNI common stock held indirectly by spouse

Indirect holdings by Tropical Aircraft Co. 8,227 shares ATNI common stock held indirectly through Tropical Aircraft Co.

Key Terms

ten percent owner, indirect ownership, weighted average price

3 terms

ten percent owner regulatory

"reporting person is indicated as a ten percent owner"

indirect ownership financial

"shares are reported as indirectly owned through VI E-Cell Tropical Telecom Ltd"

weighted average price financial

"The price reported is a weighted average price for multiple trades"

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Cornelius B. Prior Jr. report for ATNI on this Form 4?

Cornelius B. Prior Jr. reported two indirect open-market sales of ATN International (ATNI) common stock totaling 2,526 shares on August 13–14, 2026, executed through VI E-Cell Tropical Telecom Ltd at prices around $32 per share.

At what prices were the ATNI shares sold in Cornelius B. Prior Jr.’s latest Form 4?

The sales were reported at prices around $32 per share. A 26-share sale was at $32.10, while the 2,500-share sale used a weighted average price for trades executed between $32.00 and $32.10, inclusive.

How many ATNI shares did Cornelius B. Prior Jr. sell in this Form 4 filing?

The Form 4 reports total indirect sales of 2,526 shares of ATN International (ATNI) common stock. These consisted of 2,500 shares sold on August 13, 2026 and 26 shares sold on August 14, 2026 through VI E-Cell Tropical Telecom Ltd.

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

Post-transaction, reported positions include 3,982,303 shares of ATNI common stock held directly, plus indirect holdings of 500 shares held by his wife and 8,227 shares held by Tropical Aircraft Co., in addition to shares held via VI E-Cell Tropical Telecom Ltd.

Were the ATNI insider sales by Cornelius B. Prior Jr. made under a Rule 10b5-1 trading plan?

The filing indicates the Rule 10b5-1 checkbox is not marked as an affirmatively adopted plan. No footnote states that these ATN International (ATNI) transactions were executed under a Rule 10b5-1 or other pre-arranged trading plan.

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

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Available on EDGAR 08/17/2026 - 05:31 PM Accepted by SEC EDGAR 08/17/2026 - 05:30 PM Learn about SEC filing dates

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

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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2026

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	08/13/2026		S		2,500	D	$32.05(1)	64,436	I	By VI E-Cell Tropical Telecom Ltd
Common Stock	08/14/2026		S		26	D	$32.1	64,410	I	By VI E-Cell Tropical Telecom Ltd
Common Stock								3,982,303	D
Common Stock								500	I	By: Wife
Common Stock								8,227	I	By 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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount 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 $32.00 to $32.10, 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-Fact	08/17/2026
	** 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.
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)