Mattos Filho‘s Brasília tax practice operates on two key fronts: high-stakes litigation and strategic public policy engagement. On the contentious side, the team remains active before the Superior Court of Justice, the Supreme Court, and CARF. In the policy arena, the practice is a key participant in legislative discussions with Congress and executive bodies. This dual capability makes the firm a sought-after adviser for clients operating in a variety of sectors. The team’s expertise is embodied by its key practitioner Ariane Costa Guimaraes, a tax litigation specialist noted for representing corporate interests before the National Congress and key government ministries. Further adding to the team is associate Pedro Henrique de Castro Motta, who brings deep knowledge of judicial tax litigation.
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Testimonials
Collated independently by Legal 500 research team.
‘The firm has excellent capacity to operate in administrative and higher courts, especially in Brasília. As it is a full-service firm, the involvement of different areas and practices greatly contributes to the deliveries and solutions presented to clients.’
‘Ariana Guimarães actively participates in discussions and interactions with clients, with great availability. Her vision on case law and positions of higher courts is notable.’
Key clients
- Cassol
- Banco Santander
Work highlights
Represents Banco Santander and FEBRABAN (Brazilian Federation of Banks) in the most relevant tax lawsuit for the financial sector in the Supreme Court.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Ariane Guimarães
Other key lawyers
Pedro Henrique de Castro Motta; Lucas Ianagui de Carvalho Leite