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Gerdau S.A. - Form 20-F

SÃO PAULO, April 22, 2021 /PRNewswire/ -- GERDAU S.A. (NYSE:GGB, B3: GGBR3, GGBR4))) hereby announces that the Form 20-F related to the fiscal year ended December 31, 2020 was filed with the U.S. Securities and Exchange Commission (SEC) at http://sec.go