GERDAU S.A.

METALÚRGICA GERDAU S.A.

Corporate Tax ID (CNPJ/MF):

Corporate Tax ID (CNPJ/MF):

33.611.500/0001-19

92.690.783/0001-09

Registry (NIRE): 35300520696

Registry (NIRE): 35300520751

NOTICE TO THE MARKET

GERDAU S.A. (B3: GGBR / NYSE: GGB) and METALÚRGICA GERDAU S.A. (B3: GOAU) (jointly "Companies"), pursuant to CVM Resolution 44/2021 and Official Letter 7/2020 CVM/SEP, hereby inform their shareholders and the market that Rafael D. Japur (CFO/IRO) will participate in a live organized by TradeMap on September 20, 2022, at 7 p.m. at https://www.youtube.com/watch?v=FiQ2Ib8MLqgto discuss the Company's business divisions.

São Paulo, September 20, 2022.

Rafael Dorneles Japur

Executive Vice-President

Investor Relations Officer

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Gerdau SA published this content on 20 September 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 20 September 2022 13:39:09 UTC.