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 UNDER THE

SECURITIES EXCHANGE ACT OF 1934

May 2, 2024

Commission File Number: 001-32827

MACROBANK INC.

(Translation of registrant’s name intoEnglish)

Av. Eduardo Madero 1182

Buenos Aires C1106ACY

Tel: 54 11 5222 6500

(Address of registrant’s principal executiveoffices)

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 May 2, 2024.

City of Buenos Aires, May 2^nd^ 2024.

To:

CNV/BYMA/MAE

Re.: Relevant Event.

Dear Sirs,

Please be advised that on the date hereof BANCO MACRO S.A. has been given notice of a class action complaint filed against it and entitled “Protegiendo al Consumidor P.A.C. vs. Banco Macro S.A. on Recovery of Amounts Paid” (Court File #MP-6075/2024).

Plaintiff challenges the fee charged as “Check Query” on all the checking accounts existing in all branches of Banco Macro S.A. located in the Province of Buenos Aires. Plaintiff seeks to obtain the nullity of such fee and the recovery by all customers of all amounts charged under such description, plus applicable interests and legal costs.

The complaint was brought and is pending before the Court in Civil and Commercial Matters No. 11 of Mar del Plata.

Banco Macro S.A. deems there is low probability of getting an unfavorable court decision in this dispute, and even if that were the case, such unfavorable decision would not have a material impact on its assets.

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: May 2, 2024