The company said in a newspaper announcement published on Tuesday that its shareholders plan to offer up to 7.44 million voting shares at a price range of 1,000 reais to 1,333.33 reais.
The sale could be one of the country's biggest IPOs ever. Last year, Brazil housed two of the world's three largest IPOs as investors scoured riskier emerging markets for returns.
The company, based in Rio de Janeiro, hired Credit Suisse (CSGN.VX) as the lead manager for the transaction. The investment banking units of Banco Bradesco (BBDC4.SA), Itau Unibanco (ITUB4.SA), BTG Pactual and Morgan Stanley (MS.N) will also help arrange the deal, OSX said.