ATN International (NASDAQ: ATNI) insider group records 1,500-share open-market sale

Rhea-AI Filing Summary

ATN International, Inc. insider Cornelius B. Prior Jr., a ten percent owner, reported open-market sales of common stock through an affiliated entity. VI E-Cell Tropical Telecom Ltd sold a total of 1,500 shares on June 25–26, 2026 at prices around $27.05–$27.10 per share. Following these sales, that entity held 86,436 shares. The filing also shows substantial additional indirect and direct common stock holdings for Prior in trusts, related entities, and direct accounts.

Insider Trade Summary

Net Seller: 1,500 shares ($40,627)

Net Sell 7 txns

Insider PRIOR CORNELIUS B JR

Role null

Sold 1,500 shs ($41K)

Type	Security	Shares	Price	Value
Sale	Common Stock	500	$27.10	$14K
Sale	Common Stock	500	$27.10	$14K
Sale	Common Stock	500	$27.0534	$14K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 86,436 shares (Indirect, By VI E-Cell Tropical Telecom Ltd); Common Stock — 3,994,303 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 1,500 shares Sale prices: $27.0534–$27.10 per share VI E-Cell holding after sale: 86,436 shares +5 more

8 metrics

Shares sold 1,500 shares Total open-market common stock sales reported in this Form 4

Sale prices $27.0534–$27.10 per share Prices for three 500-share transactions on June 25–26, 2026

VI E-Cell holding after sale 86,436 shares Common stock held indirectly via VI E-Cell Tropical Telecom Ltd after transactions

Revocable trust holding 363,424 shares Common stock held indirectly as Trustee of Revocable Trust

Tropical Aircraft Co. holding 8,227 shares Common stock held indirectly via Tropical Aircraft Co.

Spouse account holding 500 shares Common stock held indirectly by wife

Direct common stock holding 3,994,303 shares Common stock held directly by reporting person as of June 25, 2026

Net buy/sell direction Net-sell of 1,500 shares Aggregate of all reported buy/sell transactions in this filing

Key Terms

open-market sale, ten percent owner, indirect ownership, Form 4, +1 more

5 terms

open-market sale financial

"reported open-market sales of common stock through an affiliated entity"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

ten percent owner financial

"insider Cornelius B. Prior Jr., a ten percent owner, reported open-market sales"

indirect ownership financial

"held 86,436 shares of ATN International common stock through indirect ownership in VI E-Cell Tropical Telecom Ltd"

Form 4 regulatory

"The Form 4 reflects a net-sell transaction totaling 1,500 shares"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

common stock financial

"sold 1,500 ATN International common shares in open-market transactions"

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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/29/2026 - 04:14 PM Accepted by SEC EDGAR 06/29/2026 - 04:14 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)
06/25/2026

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	06/25/2026		S		500	D	$27.1	87,436	I	By VI E-Cell Tropical Telecom Ltd
Common Stock	06/25/2026		S		500	D	$27.0534	86,936	I	By VI E-Cell Tropical Telecom Ltd
Common Stock	06/26/2026		S		500	D	$27.1	86,436	I	By VI E-Cell Tropical Telecom Ltd
Common Stock								3,994,303	D
Common Stock								500	I	By: Wife
Common Stock								8,227	I	By Tropical Aircraft Co.
Common Stock								363,424	I	Trustee of Revocable Trust

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:

	/s/ Andy Fienberg , Attorney-in-Fact	06/29/2026
	** 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)

FAQ

What insider transaction did PRIOR CORNELIUS B JR report at ATNI?

The filing reports that an entity associated with Cornelius B. Prior Jr. sold 1,500 ATN International common shares in open-market transactions. The sales were executed through VI E-Cell Tropical Telecom Ltd, an indirect holding vehicle disclosed in the ownership details.

At what prices were the ATNI shares sold in this Form 4 filing?

The reported open-market sales of ATN International common stock occurred at prices of $27.0534 and $27.10 per share. These prices apply to three separate 500-share transactions executed over two consecutive trading days.

How many ATNI shares did the entity hold after the reported sales?

After selling 1,500 shares, VI E-Cell Tropical Telecom Ltd held 86,436 shares of ATN International common stock. This post-transaction balance reflects the remaining position for that specific indirect ownership entity associated with Cornelius B. Prior Jr.

Does the Form 4 show other ATNI holdings for Cornelius B. Prior Jr.?

Yes. The Form 4 lists additional indirect holdings through a revocable trust, Tropical Aircraft Co., and a spouse account, as well as a large direct common stock position. These entries indicate a significant overall stake beyond the 86,436 shares at VI E-Cell Tropical Telecom Ltd.

Is this ATNI Form 4 transaction a buy or sell by the insider group?

The Form 4 reflects a net-sell transaction totaling 1,500 ATN International common shares. All reported trades with transaction codes were open-market sales, with no purchases or option exercises disclosed in this particular filing.

What is the role of VI E-Cell Tropical Telecom Ltd in the ATNI holdings?

VI E-Cell Tropical Telecom Ltd is disclosed as an indirect ownership vehicle for Cornelius B. Prior Jr.’s ATN International common stock. The entity executed the 1,500-share open-market sales and held 86,436 shares after the transactions were completed.