Itaú Unibanco Holding S.A. - Board of Directors Meeting Minutes December 18, 2025

Itaú Unibanco Holding S.A. convened a Board of Directors meeting on December 18, 2025, where a significant resolution was unanimously adopted to increase the company's subscribed and paid-in capital. The capital was increased by R$12,846,837,880.00, bringing the total to R$136,909,898,070.00. This increase was achieved through the capitalization of R$12,846,837,880.00 from the company's statutory revenue reserves as of December 31, 2024. As a result of this capitalization, 321,170,947 new common and preferred shares will be issued as bonus shares to existing stockholders, representing a 3% bonus. The new shares will be entitled to earnings declared from December 30, 2025, onwards. The company will also amend its bylaws at the next Stockholders' General Meeting to reflect the new capital structure. Fractional shares resulting from the bonus issuance will be handled through an auction process.