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.
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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.'
Key clients
- IDB Intermediação e Agenciamento de Serviços em Sites Ltda - InDrive
- Ternium 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.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Ariane Costa Guimaraes