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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer

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

under the Securities Exchange Act of 1934

For the month of April, 2026

Commission File Number: 001-37777

GRUPO SUPERVIELLE S.A.

(Exact name of registrant as specified in its charter)

SUPERVIELLE GROUP S.A.

(Translation of registrant’s name into English)

Reconquista 330

C1003ABG Buenos Aires

Republic of 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:

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ☐             No  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes  ☐             No  ☒

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GRUPO SUPERVIELLE S.A.

TABLE OF CONTENTS

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Autonomous City of Buenos Aires, April 8, 2026

Messrs.

Comisión Nacional de Valores

Bolsas y Mercados Argentinos S.A.

A3 Mercados S.A.

Present

RE: Relevant matter – Annual Report 20F

To whom it may concern,

Grupo Supervielle S.A. (NYSE: SUPV; BYMA: SUPV), (the “Company”) a domestic universal financial services group in Argentina with a nationwide presence, hereby announces that on April 8, 2026, the Company filed its Annual Report on Form 20F for the fiscal year ended December 31, 2025, with the US Securities and Exchange Commission (SEC). Such Report is available electronically on our website www.gruposupervielle.com and in the SEC’s website at www.sec.gov.

Yours faithfully,

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SIGNATURE

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.

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