Our professionals
Partner
Larissa Arruy
São Paulo
Areas of expertise
Experience
Larissa has a strong background in the financial and payment methods areas, having previously worked at important institutions within the industry. She is experienced in advising financial and payments institutions, fintechs, market infrastructure institutions and other participants in the sector on a wide variety of matters, including regulatory advice, lawsuits involving the Brazilian Central Bank and Brazilian Securities and Exchange Commission (CVM), structuring products and businesses, foreign investments in Brazil, matters involving foreign exchange, derivatives, regulatory compliance, and administrative proceedings. Larissa also works on corporate and capital market transactions involving regulated entities.
Education
Bachelor of Laws – Universidade de São Paulo (USP);
Specialization in Business Administration – Fundação Getúlio Vargas (FGV).
Recognitions
Chambers Brazil – Banking & Finance: Regulatory (2025);
Chambers Global – Banking & Finance: Regulatory (2026);
Chambers Fintech – Fintech (2026);
Latin Lawyer 250 – Capital Markets (2020);
Legal 500 – Banking and Finance: Leading Individuals (2021, 2026);
Análise Advocacia – Regulatory (2020, 2023, 2024), Banks (2019, 2020, 2023, 2024) and São Paulo (2019 – 2020);
Análise advocacia Mulher- Regulatory (2021, 2024), Banks (2021, 2024) and São Paulo (2021, 2024);
IFLR 1000 – Banking: Highly regarded (2021 – 2025);
Global Banking Regulation Review – 45 under 45 (2020);
Lexology Index Global – Banking: Regulatory (2021);
Lexology Index Thought Leaders – GBRR (2021).
Banking & Financial Services Bulletin: Third Quarter 2025 Updates
Subjects:
Brazil’s Central Bank presents regulatory priorities for 2025 and 2026
Subjects:
Brazil contemplates new framework for S1 financial institutions’ recovery and resolution
Subjects:
Automatic Pix: new product set to allow for recurring instant payments in Brazil
Subjects:
Brazil’s Central Bank gathers input on virtual asset regulation
Subjects:
Use of FGC by pension funds may raise banking costs
A bill introduced by Senator Renan Calheiros to extend coverage from Brazil’s Credit Guarantee Fund (FGC) to state and municipal pension funds that suffered losses tied to Banco Master has drawn criticism and is seen as having little chance of moving forward. Experts and financial sector representatives argue that the proposal could create legal uncertainty, increase banks’ costs and divert the FGC from its original purpose.
Click here to read the article published at Valor International
Areas of expertise
Central Bank supervision staff shrinks over the past decade
The supervision department of Brazil’s Central Bank has lost 21.7% of its staff since 2015. The unit is responsible for banking supervision and for monitoring risks in the financial system, including those that should have been mitigated in the case of Banco Master. According to data obtained by Valor through the Access to Information Act (LAI), the number of employees fell from 774 to 606 in 2026.
Click here and read the article published on Valor International.
Areas of expertise
Fintechs face wave of consolidation
The Central Bank of Brazil plans to use the authorization process for payment institutions and crypto-asset firms to remove participants that fail to show they are viable operators. The move, expected to begin in the first half of this year, is part of the regulator’s effort to improve the safety of the financial system.
Click here and read the article published on Valor International.
Areas of expertise
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