X0609 4 2026-04-10 0 0001073404 GERDAU S.A. GGB GGBR 0002119830 Wang Chia Yuan true AVENUE DOUTORA RUTH DE CARDOSO, 8501 8TH FLOOR, PINHEIROS SAO PAULO SAO PAULO D5 05425-070 0 0 0 1 Senior Management 0 Preferred shares 2026-04-10 4 S 0 25000 4.21 D 168895 D Restricted Stock Units 3.58 2027-03-01 2027-03-01 Preferred shares 76817 76817 D Restricted Stock Units 3.57 2027-07-31 2027-07-31 Preferred shares 184494 184494 D Restricted Stock Units 2.83 2028-03-01 2028-03-01 Preferred shares 102580 102580 D Restricted Stock Units 4.04 2029-03-01 2029-03-01 Preferred shares 75639 75639 D American Depositary Receipts The price reported in Column 4 is a weighted average price. There shares were sold in multiple transactions at prices ranging from $4.22 to $4.21, inclusive. Restricted stock units vest on March 1, 2027 (American Depositary Receipts). Restricted stock units vest on July 31, 2027 (American Depositary Receipts). Restricted stock units vest on March 1, 2028 (American Depositary Receipts). Restricted stock units vest on March 1, 2029 (American Depositary Receipts). /s/ Chia Yuan Wang 2026-04-14