Mattos Filho‘s government relations practice plays an active role in legislative discussions within the National Congress, offering strategic recommendations and advocating for corporate interests on critical matters—most recently, the tax reform and the regulation of ride-sharing services in Brazil. The team’s high-level engagement is supported by a multidisciplinary approach that draws on expertise in tax, M&A, ESG, financial markets, labour law, compliance, and corporate ethics. This broad-based knowledge enables the practice to advise a diverse client base, including prominent players in agribusiness, biotechnology, renewable energy, finance, infrastructure, and the non-profit sector. The practice is led by tax litigation and government relations specialist Ariane Costa Guimaraes.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
'Mattos Filho has consistently provided a high level of service for all our contracted needs. The team is highly qualified, with many holding postgraduate degrees and teaching positions at respected universities. Their professionals effectively represent us in meetings at the National Congress in Brasília, where they are adept at defending the interests of both our company and the broader sector.'
'Despite their considerable expertise, the firm maintains a personalised approach, remaining attentive and responsive to each client's specific demands, including direct access to partners. Furthermore, their biweekly accountability reports are clear and well-prepared, allowing us to share them directly with our associates. We are very satisfied with this partnership.'
- 'The team is technically proficient while also being attentive and accessible to the client. They are highly knowledgeable, not only in the legal foundations of the sector but also possess strong professional networks in São Paulo and Brasília that facilitate our work.'
Key clients
- IDB Intermediação e Agenciamento de Serviços em Sites Ltda - InDrive
- Ternium S.A
- Instituto de Desenvolvimento do Varejo - IDV
- Associação Nacional de Empresas de Aluguel de Veículos e Gestão de Frotas
- Dufry do Brasil Free Shop Ltda.
- Instituto GEOC
- Associação Paulista de Fundações
- Associação Brasileira dos Distribuidores de Energia Elétrica
- Geledés - Instituto da Mulher Preta
- Google Brasil Internet Ltda.
- Sociedade Beneficente de Senhoras - Hospital Sírio Libanês
- Ticket Soluções S.A
Work highlights
Assisted the Instituto para Desenvolvimento do Varejo (IDV) with studying bill modifications, providing legal support, presenting amendments and position papers, analysing amendments, and participating in meetings with legislative and executive branches.
Assisted InDrive with analysing Supplementary Bill No. 12's impacts, drafting the platform's position document, preparing legislative amendments, and monitoring progress.
Supports the Geledés Institute, combating racism and proposing public policies for the black population.
Lawyers
Leading partners
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Practice head
Ariane Costa Guimaraes