Ariane Guimarães
Mattos Filho1
Tax
Mattos Filho is a powerhouse in the Brasília market with a broad tax advisory and litigation offering. A go-to firm for multinational clients from the financial and banking sectors, It regularly acts before the Superior Court of Justice, the Supreme Court, and CARF. The team is also active in discussions with the House of Representatives, the Senate, and authorities of the Executive branch, particularly in relation to the 2023 tax reform. Tax litigation specialist Ariane Guimarães is highly regarded for representing company interests before the Ministry of Economy, the National Treasury Policy Council, and the National Congress. Another central member of the practice is Alberto Frederico Teixeira Soares Carbonar who holds a wide scope of expertise including tax amnesties, tax refunds, and annulments of tax fines.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘The team has the ability to analyse and understand the client's needs.’
‘What sets the firm apart from others is the attention, availability, quality of service, and a technical capacity that sees the present, without ignoring the past and future impacts.’
‘Ariane Guimarães' stands out for her professional capacity and rigorous ethical performance.’
‘Ariane has the ability to work in groups, to generate a consensus, to establish an environment of harmony, even under incredible pressure.’
‘Ariane delivers the highest quality results, even under difficult deadlines.’
‘Attentive team committed to the client's cause and very well-prepared professionals with a lot of knowledge of the subject.’
‘Ariane Guimarães is a unique professional who makes a total difference in the service provided by the firm.’
‘Ariane Guimarães: extremely focused, attentive, committed, has a lot of knowledge on the subjects.’
Key clients
- Banco Santander Brasil
- Sindicato Nacional das Empresas Distribuidoras de Combustíveis e de Lubrificantes
- Associação Brasileira de Planos de Saúde
- Instituto para Desenvolvimento do Varejo
- Cencosud Brasil
- Caixa de Assistência dos Funcionários do Banco do Brasil
- Samarco Mineração
- Tok & Stok
- Prosegur
Work highlights
- Representing Banco Santander and the Brazilian Federation of Banks in a tax lawsuit regarding the legitimacy of imposing PIS and COFINS on the gross operation revenue of financial institutions before the Supreme Court.
- Represented the Brazilian Association of Health Plans before the Supreme Federal Court in a direct action of unconstitutionality and an action of unconstitutionality for non-compliance with a fundamental precept regarding the location in which ISS was due.
- Represented Instituto de Desenvolvimento do Varejo as an amicus curiae before the Superior Court of Justice in two special appeals regarding ICMS-ST and PIS/COFINS.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
The lawyer(s) leading their teams.
Ariane Guimarães