Petrobras and banks are expected to play a crucial role in the sale of Braskem, with Petrobras signaling support for Eduardo Tanure's proposal to gain control of the company. The proposal reportedly does not include a public tender offer (OPA) for minority shareholders. Following an agreement between Novonor and Tanure, Braskem's shares (BRKM5) surged, with a rise of over 11% noted early in the trading session. Meanwhile, Mubadala has confirmed plans for a tender offer for Zamp (ZAMP3), suggesting a price range between R$3.30 and R$3.50 per share, although Zamp's shares declined after Mubadala indicated it is considering a share buyout to take the company private. Additionally, Petrobras seeks greater authority to appoint members to Braskem's board of directors, according to sources. Petrobras is also contemplating a potential issuance of up to R$3 billion in incentivized debentures. Separately, Saudi Aramco, after evaluating Braskem, is looking to expand its business interests in Brazil.