6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16

of the Securities Exchange Act of 1934

For the month of December 2025

Commission File Number: 001-13464

Telecom Argentina S.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

Re.: Relevant Matter-CFO

Dear Sirs,

I am writing to you in my capacity as Attorney-in-Fact of Telecom Argentina S.A. (“Telecom Argentina” or the “Company”), further to the information previously disclosed through the material fact published on July 3, 2025. This letter is to inform you that, as of yesterday, Mr. Gabriel Blasi has effectively ceased to serve as Chief Financial Officer of Telecom Argentina, due to strictly personal reasons.

The Company is currently in the process of appointing a new Chief Financial Officer and, until such process is completed, the duties of Chief Financial Officer will be performed on an interim basis by Telecom Argentina’s Director of Finance, Mr. Federico Pra.

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.