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 May, 2020

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)

Bartolomé Mitre 434, 5th Floor

C1036AAH 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  x            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  x

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  x

GRUPO SUPERVIELLE S.A.

TABLE OF CONTENTS

Autonomous City of Buenos Aires, May 5, 2020

Messrs.

Comisión Nacional de Valores

Bolsas y Mercados Argentinos S.A.

Mercado Abierto Electrónico S.A.

Present

RE: Relevant matter – Annual Report 20F

To whom it may concern,

Please be advised that on April 30, 2020, Grupo Supervielle S.A. (the “Company”) filed the Annual Report of Form 20-F for the year ended December 31, 2019, with the US Securities and Exchange Commission (“SEC”). such Report is available electronically on our website www.gruposupervielle.com and at www.sec.gov.

In this regard, it is hereby reported that as of 2018 the Company’s financial statements are issued under International Financial Reporting Standards (“IFRS”) as adopted by the Argentine Central Bank (“BCRA”), i.e. excluding paragraph 5.5. Impairment of IFRS 9 Financial Instruments and IAS Financial Information in Hyperinflationary Economies.

On our website you may find an explanation of the inflation adjustment calculation methodology and a reconciliation between the balance sheet and income statement for the year ended December 31, 2019 under the BCRA presentation standards and under full IFRS used in the Annual Report 20F.

Yours faithfully,

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.