Braskem's new controlling shareholder has filed for a public tender offer (OPA) to acquire the remaining shares of the Brazilian petrochemical giant.

The move by the IG4-backed fund signals an intent to take the company private, despite ongoing headwinds from the subsidence disaster in Maceió that continues to disrupt operations and weigh on the stock price.

The tender offer filing comes amid a complex legal backdrop.

Banco Safra has previously filed a lawsuit in a São Paulo court seeking to suspend the sale of controlling stakes in Braskem to the IG4-backed fund.

That legal challenge threatens to derail the transaction and could significantly reshape the ownership structure of the company if successful.

The new buyout offer adds another layer of complexity to the dispute, as minority shareholders may now have a direct exit route.