Department profile
TozziniFreire

Competition/Antitrust

Brazil Guide 2026 : Brazil

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TozziniFreire

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About

Provided by TozziniFreire

The Antitrust and Competition practice group has extensive experience representing our clients before the Brazilian Antitrust Commission (CADE), including negotiating leniency agreements and cease agreements under the Brazilian Competition Law, as well as handling premerger notification filings and regulatory clearance for complex M&A transactions. The group also provides all stages of antitrust compliance counseling, including developing compliance programs tailored to client-specific needs, to improve risk management and reduce violations.

Recognized as among the cadre of elite antitrust lawyers in Brazil, the team is led by Marcelo Calliari, a former counsel of CADE. The Antitrust and Competition practice is one of the largest in Brazil and one of the firm’s most active, with experience handling hundreds of market concentration cases and major merger and business conduct investigations.

Chambers Review

Provided by Chambers

Competition/Antitrust - Brazil

Band 1

What the Team is Known For

TozziniFreire's prestigious team is widely respected for handling the negotiation of sensitive leniency agreements connected to cartel investigations. Clients further benefit from its multidisciplinary expertise within the competition arena, including merger review proceedings, compliance programmes and defence in anti-competitive conduct cases before CADE. The team is also active in judicial disputes arising from antitrust-related damage claims.

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Work Highlights

Provided by Chambers

  • TozziniFreire represented IBM Brasil in securing a favourable settlement in CADE’s investigation into the exchange of competitively sensitive information among HR departments.

Strengths

Provided by Chambers

  • TozziniFreire's team is proactive and consistently delivers work I am very happy with. They are extremely quick, and they approach matters from a broad perspective, looking at all angles and anticipating potential risks.

    Competition/Antitrust respondentBrazil

  • TozziniFreire stands out for their ability to work seamlessly within large international teams. The team was highly responsive and communicated in clear business language. Their deep understanding of CADE, strong relationships, and technical expertise make it easy to explain and position the specificities of the Brazilian process and anticipate procedural developments. TozziniFreire is my go‑to firm for Brazil.

    Competition/Antitrust respondentBrazil

  • TozziniFreire's service levels and responsiveness are outstanding. The team is always fast, always available and consistently accurate in their analysis. The law firm's commercial awareness is equally strong.

    Competition/Antitrust respondentBrazil

  • TozziniFreire’s lawyers provide excellent legal analysis and clear, well‑communicated advice to in‑house counsel. The team focuses on the key issues in each matter and conduct efficient yet thorough investigations. Their understanding of substantive antitrust issues is outstanding, and they communicate seamlessly in English, making collaboration smooth and highly effective.

    Competition/Antitrust respondentBrazil

Notable Practitioners

Provided by Chambers

  • Marcelo Calliari
    Marcelo Calliari

    Marcelo Calliari

    Marcelo Calliari has a notable reputation for his longstanding expertise in sophisticated domestic and cross-border cartel investigations, as well as related negotiation of leniency agreements.

    • Marcelo Calliari is a leading authority in Brazil for complex international investigative matters.

      Competition/Antitrust respondentBrazil

    • Marcelo Calliari is an absolutely fantastic lawyer, who I would work with on any case and at any time. He is knowledgeable, calm, kind and extremely sharp. He clearly knows how to get things done and explore new avenues.

      Competition/Antitrust respondentBrazil

    • Marcelo Calliari never disappoints. He is extremely knowledgeable, creative and practical in his approach. He is simply exceptional.

      Competition/Antitrust respondentBrazil

    • Marcelo Calliari is deeply knowledgeable, creative, thoughtful and highly strategic.

      Competition/Antitrust respondentBrazil
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  • Guilherme Ribas
    Guilherme Ribas

    Guilherme Ribas

    Guilherme Ribas is admired by clients for his adept handling of competition mandates. He often assists clients with sophisticated merger control proceedings, investigations, leniency agreements and monitoring before CADE.

    • Guilherme has an excellent command of antitrust law, communicates clearly and remains sharply focused on the defined scope of the investigation.

      Competition/Antitrust respondentBrazil
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  • Tatiana Lins Cruz
    Tatiana Lins Cruz

    Tatiana Lins Cruz

    Tatiana Lins Cruz is well regarded in the market for her activity in competition matters. She often represents clients in mandates involving cartel investigations and negotiation of leniency agreements. Tatiana Lins Cruz has further experience in antitrust-related damage litigation.

    • Tatiana Lins Cruz is creative, forward‑thinking and highly knowledgeable. She is relentless in her dedication and extremely hard‑working. An absolute pleasure to work with.

      Competition/Antitrust respondentBrazil

    • Tatiana Lins Cruz is highly competent, helpful, technically skilled and has a very good understanding of the subject.

      Competition/Antitrust respondentBrazil
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  • Marcel Medon Santos
    Marcel Medon Santos

    Marcel Medon Santos

    Marcel Medon Santos is frequently retained by companies to negotiate agreements and conduct investigations related to anticompetitive behaviour, as well as to file merger reviews before CADE. Marcel Medon Santos is also active in judicial disputes involving cartel damage claims.

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  • Vivian Fraga
    Vivian Fraga

    Vivian Fraga

    Vivian Fraga is experienced in conducting merger reviews, horizontal and vertical commercial agreements, abuse of dominance and especially cartels investigations. Clients benefit from years of experience in this field, especially due to her background working at CADE.

    • Vivian Fraga is competent, attentive and consistently helpful in providing clear updates on the progress of matters.

      Competition/Antitrust respondentBrazil
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  • Patricia Bandouk Carvalho
    Patricia Bandouk Carvalho

    Patricia Bandouk Carvalho

    Patricia Bandouk Carvalho is praised by the market for her experience in negotiating intricate leniency agreements, cartel investigations and antitrust matters in courts.

    • Patricia Bandouk Carvalho is not afraid to speak the truth. She is an important counterbalance because she always brings me back down to earth. Her availability and willingness to support me are excellent.

      Competition/Antitrust respondentBrazil
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Ranked Individuals at TozziniFreire (6)

Brazil

Members

Provided by TozziniFreire

TozziniFreire has rankings in the following guides

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