Mergers, Acquisitions and Privatizations Castro Barros is very active in mergers, acquisitions and privatizations involving Brazilian and foreign companies. From the start of the Brazilian denationalization program, the Office has been assisting clients on both sides, helping interested buyers in formulating bids and advising government companies to prepare for privatization. Castro Barros experience in structuring mergers and acquisitions, through due diligence investigation of fiscal, labor, social security, commercial, corporate, civil, environmental and administrative questions, including critical points and consultation with government organs, has served its clients in good stead in many operations.