Exhibit 99.1
GERDAU S.A.
Corporate Tax ID (CNPJ/MF): 33.611.500/0001-19
Registry (NIRE): 35300520696
NOTICE TO THE MARKET
GERDAU S.A. (B3: GGBR / NYSE: GGB) (“Company”), informs that, in report disclosed today, Moody’s Ratings upgraded the Long-Term Foreign Currency Issuer Default Rating (IDRs) of Gerdau S.A. to ‘Baa2’ from ‘Baa3’. Moddy’s also upgraded Gerdau’s and its related subsidiary companies’ senior unsecured notes to ‘Baa2’ from ‘Baa3’. The Rating Outlook is now Stable.
São Paulo, October 2nd, 2024.
Rafael Dorneles Japur
Executive Vice-President
Investor Relations Office