By Brazil Stock Guide – Ecopetrol’s planned takeover of Brava Energia SA (B3: BRAV3) faces a new legal challenge after Westlawn Energia Brasil filed for arbitration over Brava’s Atlanta offshore field, one of the most important assets in the Brazilian company’s portfolio.
Brava said Westlawn, which owns 20% of Atlanta, claims the transaction with Ecopetrol SA (NYSE: EC) and the related Brazilian tender offer may trigger a right of first refusal over Brava’s remaining 80% stake in the field.
Brava rejected the claim. It said Westlawn’s allegations “have no legal basis” and are not supported by the applicable agreements. The company also said the dispute does not affect its operations, financial capacity or regular business.
The arbitration adds a contractual risk to a deal already facing regulatory delays. On Monday, Brava said Brazil’s securities regulator, known as the CVM, had requested changes to the tender offer notice. Ecopetrol’s Brazilian subsidiary disagreed and said it would appeal to the CVM board. The offer remains suspended until a final decision.
Two days later, Brava said Cade, Brazil’s antitrust authority, had approved Ecopetrol’s acquisition of control without restrictions. The approval removed a competition hurdle, but left the deal dependent on the CVM process, shareholder acceptance and now a private contractual dispute over Atlanta.
Atlanta at the Center
Atlanta gives the dispute its strategic weight. The field is already connected to its definitive production system and has room to expand. Brava has said the asset’s oil serves low-sulfur fuel markets in Southeast Asia.
Located about 185 kilometers (115 miles) off the coast of Rio de Janeiro in water depths exceeding 1,500 meters (4,920 feet), Atlanta produces heavy 14° API crude from a technically challenging reservoir. First oil from Atlanta’s definitive production system was achieved in December 2024. Since then, the field has produced more than 11 million barrels and reached peak output of 45,500 barrels per day, close to the FPSO Atlanta’s nameplate capacity of 50,000 barrels per day.
Westlawn is a Houston-based investment firm focused on long-term oil and gas assets. Its 20% stake in Atlanta gives it direct exposure to one of Brava’s most important offshore fields.
Westlawn entered the field in September 2024, when Brava completed the sale of a 20% stake in the BS-4 concession, which includes Atlanta and Oliva, to affiliates of Westlawn Americas Offshore. The transaction closed after all conditions precedent were met and Brazil’s oil regulator, known as ANP, gave its consent.
Brava received US$234 million at closing, in addition to a US$75 million upfront installment received after the contract was signed in March 2024.
A Change-of-Control Fight
Public filings do not disclose the clause Westlawn is invoking. The arbitration request suggests a dispute over indirect change of control. Westlawn is not saying Ecopetrol is buying Atlanta directly. Its apparent argument is that buying control of Brava could have the same economic effect as transferring Brava’s stake in the field.
Such clauses are common in oil, mining and infrastructure assets. Partners often restrict transfers of strategic assets, including indirect transfers through changes in control. The outcome usually depends on the exact language of private contracts.
For Ecopetrol, the challenge comes at a sensitive time. The Colombian state-controlled oil company is seeking control of Brava to expand in Brazil’s oil and gas market, across offshore, onshore, midstream and downstream assets. Atlanta sits at the center of that strategy.
The immediate issue is whether the arbitration can delay the tender offer or proceed in parallel. Brava has not said whether Westlawn sought emergency relief to suspend the transaction. It has also not disclosed any injunction or suspension order.
That matters. If a court or arbitral tribunal had granted an order blocking the deal, Brava would likely have had to inform investors. For now, the arbitration remains a potentially significant contractual dispute with no declared effect on closing.