6-K

UNITED STATES

SECURITIES ANDEXCHANGE COMMISSION

Washington, D.C.20549

FORM 6-K

REPORT OF FOREIGNPRIVATE ISSUER

Pursuant to Rule 13a-16or 15d-16

of the SecuritiesExchange Act of 1934

For the month of March 2026

Commission File Number: 001-13464

Telecom ArgentinaS.A.

(Translation of registrant’s name into English)

General Hornos,No. 690, 1272

Buenos Aires,Argentina

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Telecom ArgentinaS.A.

TABLE OF CONTENTS

Item

1.	English translation of letter dated March 10, 2026, to the Argentine Securities & Exchange Commission (Comisión Nacional de Valores)
FREE TRANSLATION<br><br> <br><br><br> <br>Buenos Aires, March 10, 2026<br><br> <br><br><br> <br>Comisión Nacional de Valores
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Re.: Decisionto summon Ordinary and Extraordinary General Shareholders’ Meeting and Class “A” and Class “D”Shares Special Shareholders’ Meetings to be held on April 29th, 2026

Dear Sirs,

I am writing to you as Attorney-in-fact of Telecom Argentina S.A. (the “Company”) to inform you that the Company’s Board of Directors, in a meeting held today, resolved to summon an Ordinary and Extraordinary General Shareholders’ Meeting and Class “A” and Class “D” Shares Special Shareholders’ Meetings to be held on April 29th, 2026, at 11:00 a.m. Buenos Aires Time on the first call, and at 12:00 p.m. Buenos Aires Time on the second call, to deal with the agenda of the ordinary shareholders’ meeting, in order to discuss, among other items, the accounting documentation corresponding to the fiscal year ended December 31, 2025.

The Shareholders’ Meeting will be held by personal attendance.

We will submit in due time and manner the additional documentation required by Section 4, Chapter II, Title II of the Argentine Securities & Exchange Commission (Comisión Nacional de Valores) Rules (N.T. 2013).

Sincerely,

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.