Form 4 Filing for GERDAU S.A.

This SEC filing details transactions made by Marcos Eduardo Faraco Wahrhaftig, Executive Vice President of GERDAU S.A., on April 9, 2026. The filing indicates the disposal of 12,419 preferred shares at a weighted average price of $4.06 per share, with prices ranging from $4.05 to $4.06. The price is reported in USD, translated from Brazilian reais at a rate of R$5.0821 per US$1.00. Following this transaction, the post-transaction number of shares owned is 0. The filing also lists holdings of various series of Restricted Stock Units, all directly owned, with exercise prices ranging from $3.60 to $4.10 and underlying securities of preferred shares. These RSUs have future exercise dates ranging from February 12, 2027, to February 12, 2029.