Insider Ownership Filing for GERDAU S.A. - Form 3

This filing, Form 3, details the initial ownership of securities by Gustavo Silva de Franca, an officer of GERDAU S.A. (GGB/GGBR). The report indicates direct ownership of 25,729 preferred shares. Additionally, it outlines holdings in Restricted Stock Units (RSUs) that vest on specific dates between February 12, 2027, and February 12, 2029. These RSUs are convertible into preferred shares with exercise prices denominated in Brazilian reais. The exercise dates and prices are as follows: February 12, 2027 (R$19.50) for 3,570 units; August 1, 2027 (R$19.06) for 50,221 units; February 12, 2028 (R$18.32) for 4,117 units; and February 12, 2029 (R$20.83) for 4,038 units. The filing was signed on May 8, 2026, reporting activity as of May 5, 2026.