About Mariana
Mariana is the Managing Partner and Head of Corporate and M&A at Leite, Tosto e Barros Advogados, bringing over two decades of experience in Corporate Law, Mergers & Acquisitions, Governance, Compliance, and Data Protection.As Managing Partner, she leads the firm’s strategic direction and ensures operational excellence across finance, IT, marketing, and administration—combining leadership vision with technical and business precision.As Head of Corporate and M&A, Mariana advises clients on the full spectrum of corporate and transactional matters, from company formation and shareholder agreements to complex M&A and restructuring transactions. She oversees every stage of the process—from deal structuring and negotiation to due diligence and closing—focusing on practical, strategic, and value-driven results.Beyond her corporate and transactional practice, Mariana is known for her holistic advisory approach, assisting clients in navigating challenges across all areas of their business. She provides trusted counsel on governance, compliance, regulatory, contractual, and strategic issues—acting as a long-term partner in managing risk and driving sustainable growth.Certified in Compliance and Anti-Corruption (LEC), she also develops tailored compliance frameworks, Codes of Conduct, and risk assessment programs that align with diverse regulatory requirements.Her experience spans industries such as energy, infrastructure, fintech, logistics, pharmaceuticals, telecommunications, and real estate.Mariana’s leadership and professional excellence have been recognized by Análise Advocacia Mulher (2021, 2022, 2025), Latin Lawyer 250 (Infrastructure, 2014–2017), The Legal 500 (Corporate and M&A, including Compliance, 2015–2018), and Best Lawyers (Administrative Law Litigation, 2024–2025)
Mariana is the Managing Partner and Head of Corporate and M&A at Leite, Tosto e Barros Advogados, bringing over two decades of experience in Corporate Law, Mergers & Acquisitions, Governance, Compliance, and Data Protection.As Managing Partner, she leads the firm’s strategic direction and ensures operational excellence across finance, IT, marketing, and administration—combining leadership vision with technical and business precision.As Head of Corporate and M&A, Mariana advises clients on the full spectrum of corporate and transactional matters, from company formation and shareholder agreements to complex M&A and restructuring transactions. She oversees every stage of the process—from deal structuring and negotiation to due diligence and closing—focusing on practical, strategic, and value-driven results.Beyond her corporate and transactional practice, Mariana is known for her holistic advisory approach, assisting clients in navigating challenges across all areas of their business. She provides trusted counsel on governance, compliance, regulatory, contractual, and strategic issues—acting as a long-term partner in managing risk and driving sustainable growth.Certified in Compliance and Anti-Corruption (LEC), she also develops tailored compliance frameworks, Codes of Conduct, and risk assessment programs that align with diverse regulatory requirements.Her experience spans industries such as energy, infrastructure, fintech, logistics, pharmaceuticals, telecommunications, and real estate.Mariana’s leadership and professional excellence have been recognized by Análise Advocacia Mulher (2021, 2022, 2025), Latin Lawyer 250 (Infrastructure, 2014–2017), The Legal 500 (Corporate and M&A, including Compliance, 2015–2018), and Best Lawyers (Administrative Law Litigation, 2024–2025)
Mariana is the Managing Partner and Head of Corporate and M&A at Leite, Tosto e Barros Advogados, bringing over two decades of experience in Corporate Law, Mergers & Acquisitions, Governance, Compliance, and Data Protection.
As Managing Partner, she leads the firm’s strategic direction and ensures operational excellence across finance, IT, marketing, and administration—combining leadership vision with technical and business precision.
As Head of Corporate and M&A, Mariana advises clients on the full spectrum of corporate and transactional matters, from company formation and shareholder agreements to complex M&A and restructuring transactions. She oversees every stage of the process—from deal structuring and negotiation to due diligence and closing—focusing on practical, strategic, and value-driven results.
Beyond her corporate and transactional practice, Mariana is known for her holistic advisory approach, assisting clients in navigating challenges across all areas of their business. She provides trusted counsel on governance, compliance, regulatory, contractual, and strategic issues—acting as a long-term partner in managing risk and driving sustainable growth.
Certified in Compliance and Anti-Corruption (LEC), she also develops tailored compliance frameworks, Codes of Conduct, and risk assessment programs that align with diverse regulatory requirements.
Her experience spans industries such as energy, infrastructure, fintech, logistics, pharmaceuticals, telecommunications, and real estate.
Mariana’s leadership and professional excellence have been recognized by Análise Advocacia Mulher (2021, 2022, 2025), Latin Lawyer 250 (Infrastructure, 2014–2017), The Legal 500 (Corporate and M&A, including Compliance, 2015–2018), and Best Lawyers (Administrative Law Litigation, 2024–2025)
