6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDERTHE

SECURITIES EXCHANGE ACT OF 1934

December 14, 2020

Commission File Number: 001-32827

MACRO BANK INC.

(Translation of registrant’s nameinto English)

Av. Eduardo Madero 1182

Buenos Aires C1106ACY

Tel: 54 11 5222 6500

(Address of registrant’s principalexecutive offices)

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

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):

INDEX

Translation of a submission from Banco Macro to the CNV dated on December 14, 2020

City of Buenos Aires, December 14^th^ 2020

To

CNV / BYMA / MAE

Re.: Relevant event

Please be advised that Moody’s Investors Services has informed that, in line with changes in the methodology, they proceeded to update the grading of Banco Macro S.A. in global scale as follow:

Senior Unsecured debt Series B notes from Ca to Caa3

Sincerely,

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, thereto duly authorized.

Date: December 14, 2020