Material Fact - Secondary Public Offering

Banco do Estado do Rio Grande do Sul S.A. ("Banrisul"), in compliance with the CVM Instruction no. 358, of January 3, 2002 and Paragraph 4th of Article 157 of Law 6404 of December 15, 1976, announces to its shareholders and to the market that it has been informed by the State of Rio Grande do Sul (the "Controller") of their interest in conducting a public offering involving control shares (limited to those exceeding of the shareholding required to preserve the control of the Company) and also preferred shares.

Banrisul will maintain informed its shareholders and the market in general of any new material facts regarding to this matter.

Porto Alegre, October 04, 2017.

Ricardo Richiniti Hingel
CFO and Investor Relations Officer
Banco do Estado do Rio Grande do Sul S.A. - Banrisul

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