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Tomás Neiva

Tomás Neiva

Areas of expertise


Tomás advises companies and their investors across a diverse range of sectors throughout the entire corporate lifecycle and on a variety of matters, such as corporate formation, venture capital and growth equity financings, corporate reorganizations and M&A transactions.


He previously worked at one of Spain’s most renowned law firms, where he focused on cross-border transactions, especially venture capital financings and M&As involving Europe, Brazil and other Latin American countries.


Tomás was part of the team of experts invited by the Brazilian Ministry of Economy to discuss proposals for the formulation of the Brazilian Legal Framework for Startups and, taking advantage of this experience, wrote an e-book titled Comentários ao Marco Legal das Startups (‘Comments on the Legal Framework for Startups’), published by Saraiva.


He teaches venture capital and startup law within XP Educação’s MBA in Exponential Management, and regularly speaks on the subject at public events.


Bachelor of Laws – Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio);

Master of Business Law – Fundação Getúlio Vargas Foundation (FGV-SP);

Master of Corporate Law – Universidad de Alcalá de Henares, Spain;

Venture Capital Executive Program – UC Berkeley, USA.


Chambers Brazil – Venture Capital (2023);

IFLR 1000 – M&A: Highly regarded (2020 – 2023);

Leaders League – Venture Capital (2023);

Latin Lawyer 250 – Corporate and M&A (2024); Private Equity (2024);

The Legal 500 – Venture Capital: Next Generation Partner (2024).

Único. The Mattos Filho news portal

Authored publications

Mattos Filho in the media

With Tomás Neiva

Mattos Filho annouces two new partners

​Mattos Filho has announced that Tomás Neiva (Corporate/M&A) and Gustavo Swenson (Life Sciences and Healthcare) have been admitted as the firm’s newest partners. With both based at the São Paulo office, Tomás and Gustavo’s arrival underlines Mattos Filho’s commitment to continued, sustainable growth. The total number of partners at the firm now reaches 119.

Click here to read Iberian Lawyer article.

Mattos Filho adds corporate and life sciences partners

​Mattos Filho, Veiga Filho, Marrey Jr e Quiroga Advogados has appointed two new partners by hiring from local law firms Neiva, Barros & Figueiró Sociedade de Advogados (NBFA) and SPLaw – Spiewak e Carneiro Advogados, strengthening its corporate and M&A and life sciences departments.

Click to read the Latin Lawyer article.

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