The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

Demarest Advogados

Work +55 21 3723 9800
Fax +55 21 3723 9822
Brasilia, Campinas, Rio de Janeiro, Sao Paulo, Sao Paulo

Guilherme Vieira da Silva

Work +55 21 3723.9821
Demarest Advogados

Work Department

Life Sciences & BiotechnologyMergers and Acquisitions




Guilherme Vieira da Silva is a partner of the M&A practice of Demarest Advogados. Starting in 1998, Guilherme has constructed an extensive experience representing Brazilian and international clients on a number of complex multi-national acquisitions, sale of assets, formation of joint ventures and structuring of corporate governance models. He has been recognized by publications and has worked on deals named for international awards. Guilherme Vieira da Silva is particularly focused on transactions involving regulated industries such as Healthcare Services and Real Estate to deliver clients a combination of industry knowledge, in depth regulatory understanding and strategic planning to assist clients navigate the Brazilian business environment.




Northwestern University School of Law, LLM, with honors. Universidade do Estado do Rio de Janeiro, Specialization Course in Civil and Constitutional Law. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), BA in Law (J.D. equivalent).


Corporate and M&A

Within: Corporate and M&A

The busy and buoyant M&A department at Demarest Advogados has seen significant growth. In 2018, the firm hired Joyl Gondim from Azevedo Sette Advogados and Guilherme Vieira da Silva from Tauil & Chequer Advogados in association with Mayer Brown, as well as promoting Glaucia Ferreira and Thereza Maria Sarfert Franco Montoro to the partnership in 2018 and 2019, respectively. It has also expanded its private equity practice and counts major private equity firms among its clients, many of which are new clients for the firm. The practice group's cross-border capabilities are also of note; highly regarded international firms have referred work to the M&A team in multi-jurisdictional matters, and the firm also runs a number of foreign desks. In recent examples, Thiago Barbosa Sandim acted for Deere & Company on its acquisition of Wirtgen Group, and Gabriel Ricardo Kuznietz advised General Electric on the sale of its global electrification solutions business to ABB. In a significant matter in the transport and logistics sector, André Luiz Freire advised Azul Linhas Aéreas on the establishment of an integrated logistics solutions company with Correios do Brasil; the company will have 50.01% of its capital owned by the former and 49.99% owned by the latter. Luciana Cossermelli Tornovsky has vast experience in M&A and joint ventures, and also heads the firm's pro bono practice and corporate responsibility groups. Lucas Tavares Bueno, Thiago Rodrigues Maia and José Setti Diaz are additional contacts. Paulo Coelho da Rocha is highly recommended.

[back to top]

Brazil: Energy and natural resources


Within: Mining

Demarest Advogados‚Äô growing profile for mining work received a further boost in 2018 with the hire of M&A partner Guilherme Vieira da Silva¬†from Tauil & Chequer Advogados in association with Mayer Brown;¬†he is noted for his strong record in transactions involving regulated industries, including mining. Department co-head Thiago Maia¬†recently advised Imerys do Brasil Com√©rcio de Extra√ß√£o de Min√©rios on the R$127m sale of L-Imerys Ind√ļstria e Com√©rcio de Cal to Minera√ß√£o Belocal.¬†Gon√ßalo Godinho¬†co-leads the group - which also acts for Vale,¬†ArcelorMittal and Carmeuse Lime & Stone.

[back to top]

Back to index

Legal Developments worldwide

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to