Current Report by Foreign Issuer (Form 6-K)

INDEX

Translation of a submission from Banco Macro to the CNV dated on November 2, 2026.

Buenos Aires, November 2, 2026

To:

Comisión Nacional de Valores / BYMA / A3 Mercados

Re.: Banco Macro S.A. Reports Relevant Event

in Compliance with Section 3, subsection 23,

Chapter I of Book XII of the Rules of the

Comisión Nacional de Valores.

Dear Sirs,

In my capacity as attorney-in-fact of Banco Macro S.A. (the "Bank") and in compliance with Section 3, subsection 23, Chapter I of Book XII of CNV Regulations, I hereby inform the Comisión Nacional de Valores (the "CNV") that the Bank has acquired its own shares issued by the Bank under the provisions of Section 64 of Law 26,831 and applicable CNV Rules and Regulations.

In that respect, we inform you that the Bank acquired 410,355 common, book entry, Class B shares with a par value of Ps$. 1 (one Peso) each and entitled to 1 (one) vote per share, with an average price of Ps$ 10,059.904 per share, and an aggregate amount of Ps$. 4,128,131,910.

In case of any doubt or inquiry, please contact me.

Sincerely,