ATN International holder plans 5,000-share sale

ATN International (ATNI) has a selling stockholder planning to sell 5,000 common shares through UBS Financial Services Inc., with sales expected on or after 08/17/2026 on NASDAQ.

Rhea-AI Filing Summary

ATN International (ATNI) has a selling stockholder planning to sell 5,000 common shares through UBS Financial Services Inc., with sales expected on or after 08/17/2026 on NASDAQ. The shares trace back to a 11/30/1986 "gift of initial equity investment" to Cornelius B. Prior Jr.

The filing also lists prior dispositions over the past three months by VI E-Cell Tropical Telecom Ltd, including blocks such as 17,500 shares on 05/27/2026, 19,100 shares on 06/12/2026, and 12,610 shares on 06/01/2026, plus a 5,000-share sale by Prior Family Foundation on 08/14/2026.

Key Figures

Shares proposed for sale: 5,000 shares Largest single recent sale: 19,100 shares Second-largest recent sale: 17,500 shares +3 more

6 metrics

Shares proposed for sale 5,000 shares Common shares to be sold through UBS Financial Services Inc. on or after 08/17/2026

Largest single recent sale 19,100 shares Sold by VI E-Cell Tropical Telecom Ltd on 06/12/2026

Second-largest recent sale 17,500 shares Sold by VI E-Cell Tropical Telecom Ltd on 05/27/2026

Notable recent block 12,610 shares Sold by VI E-Cell Tropical Telecom Ltd on 06/01/2026

Prior Family Foundation sale 5,000 shares Common shares sold on 08/14/2026

Original gift shares reference 363,424 shares Common shares referenced as "Gift of initial equity investment" dated 11/30/1986

Key Terms

Form 144, Gift of initial equity investment, Securities Sold During The Past 3 Months

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Gift of initial equity investment financial

"Common shares | 11/30/1986 | Gift of initial equity investment | Cornelius B Prior Jr"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What does ATNI’s Form 144 filing disclose about upcoming share sales?

The filing reports a plan to sell 5,000 common shares of ATN International through UBS Financial Services Inc. on or after 08/17/2026 on NASDAQ, under Form 144, which covers proposed sales by affiliates or large holders.

Who is the beneficial source of the ATNI shares in this Form 144?

The shares originate from a "gift of initial equity investment" dated 11/30/1986 to Cornelius B. Prior Jr. This historical gift is cited as the acquisition method for the common shares now being proposed for sale under Form 144.

How many ATNI shares has VI E-Cell Tropical Telecom Ltd sold recently?

Over the past three months, VI E-Cell Tropical Telecom Ltd reported multiple ATNI share sales, including 17,500 shares on 05/27/2026, 19,100 shares on 06/12/2026, and 12,610 shares on 06/01/2026, along with several smaller transactions.

Did the Prior Family Foundation sell any ATNI shares according to this Form 144?

Yes. The Prior Family Foundation is listed as selling 5,000 common shares of ATNI on 08/14/2026. This transaction appears among the "Securities Sold During The Past 3 Months" section of the Form 144 disclosure.

What brokerage firm is handling the proposed ATNI share sale in this Form 144?

The proposed sale of 5,000 ATNI common shares will be handled by UBS Financial Services Inc., located at 1000 Harbor Blvd, 3rd Floor, Weehawken, NJ 07086. The shares are expected to be sold on NASDAQ.

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

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Available on EDGAR 08/17/2026 - 04:07 PM Accepted by SEC EDGAR 08/17/2026 - 04:06 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001366518
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	ATN International Inc
SEC File Number	001-12593
Address of Issuer	500 Cummings Center, Suite 2450 Beverly MASSACHUSETTS 01915
Phone	9786191300
Name of Person for Whose Account the Securities are To Be Sold	Prior Family Foundation DTD 6/9/06
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Stakeholder

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
common shares	UBS Financial Services Inc 1000 Harbor Blvd 3rd Floor Weehawken NJ 07086	5000	157050	15380000	08/17/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common shares	11/30/1986	Gift of initial equity investment	Cornelius B Prior Jr			363424	11/30/1986	Gift of initial equity investment

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
VI E-Cell Tropical Telecom Ltd PO Box 12030 St. Thomas VI 00801-5030	common shares	05/20/2026	3500	94570
VI E-Cell Tropical Telecom Ltd PO Box 12030 St. Thomas VI 00801-5030	common shares	05/21/2026	2000	54500
VI E-Cell Tropical Telecom Ltd PO Box 12030 St. Thomas VI 00801-5030	common shares	05/26/2026	2854	79798
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	05/27/2026	17500	492975
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	05/28/2026	2500	70625
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/01/2026	12610	356737
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/02/2026	6000	169800
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/11/2026	2000	54600
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/12/2026	19100	534036
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/25/2026	1500	40626
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	06/29/2026	5000	138235
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	08/06/2026	7000	208159
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	08/07/2026	500	15585
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	08/13/2026	2500	80125
VI E-Cell Tropical Telecom Ltd PO Box 12030 St Thomas VI 00801-5030	common shares	08/14/2026	26	834
Prior Family Foundation PO Box 12030 St Thomas VI 00801-5030	common shares	08/14/2026	5000	156508

144: Remarks and Signature

Remarks	Cornelius B Prior Jr is an over 10% stakeholder and control person of ATN International Inc. Cornelius B Prior Jr is also a member of the Prior Family Foundation, who is selling the shares.
Date of Notice	08/17/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Mijo Suric, for UBS Financial Services Inc, as attorney-in-fact for Prior Family Foundation DTD 6/9/06
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)