Competition/Antitrust
Brazil
1 year ranked
LAWYER PROFILE
Ademir Antonio Pereira Júnior
Global 2026
Ranked in 1 practice area
About
Provided by Del Chiaro Pereira Advogados
Global
Practice Areas
Competition/Antitrust
Internet regulation
Telecommunications
Payments
Career
Ademir Pereira is a co-head of the antitrust/competition practice at Del Chiaro Pereira. With almost 20 years of antitrust/competition practice, his experience comprises the entire range of antitrust issues - merger review, cartel investigations and several landmark unilateral conduct cases. Ademir is regular antitrust counsel to major international companies such as Google, ArcelorMittal, Mondelez, Ericsson, Kimberly-Clark, Gilead Sciences, Lundbeck, Volkswagen.
He has represented clients in the most relevant cases in the digital economy and matters that shaped the interface between IP and Antitrust. In addition, Ademir has extensive experience with cases in industries like pharmaceutical, financial/payments, consumer products, steel, infrastructure and automotive. He is currently advising clients in various cases in Brazil and across LATAM jurisdictions.
For the past 12 years, Ademir has been consistently nominated as one of Brazil´s top antitrust attorneys by Chambers Latin America (Band 2), Legal 500 (“next generation partner”), Analise 500 (“most admired” in antitrust, technology, automotive, logistics, mining and steel) and Who’s Who Legal (“Though Leader – Global Elite”). In 2023 and 2025, he won the Legal500 Awards as “Lawyer of the Year – Competition/Antitrust”. In 2021, he was shortlisted for the Global Competition Review Awards as “Lawyer of the Year (under 40)”. From 2020-2024, Ademir featured in the prestigious list “40 Under 40”, published by Global Competition Review to honor the 40 best competition lawyers in the word under 40 years of age. Ademir has published several papers in Brazilian and international legal publications and has co-authored books on competition law, IP and antitrust, internet regulation and financial regulation.
Professional Memberships
Chair of the Competition Commission of Brazil's Corporate Law Institute (IBRADEMP)
Member of the Competition Commission of the Brazilian Bar Association
Council of IBRAC (Brazili Institute of Competition and Consumer Relations)
Personal
PhD, Master Degree (LLM), and Bachelor of Laws Degree (LLB) from the University of São Paulo
Master Degree (LLM), with High Honors in Law, Science and Technology, from Stanford University
Chambers Review
Provided by Chambers
Chambers Global Guide
Competition/Antitrust - Brazil
Band 2
Individual Editorial
Ademir Antonio Pereira Júnior has a solid reputation in the market for his performance in several competition matters, being particularly active in investigation mandates before CADE.
Strengths
Provided by Chambers
Ademir Júnior gets involved with the company and seeks to understand the business in depth. He has an excellent sense of urgency, helpfulness and strategic vision in his performance.
Competition/AntitrustChambers Global GuideAdemir is a great lawyer, with extensive technical knowledge, attention to detail and understanding of the company's needs.
Competition/AntitrustChambers Global GuideAdemir is an excellent lawyer, with extensive competition experience. He is collaborative and proposes high-level strategies and solutions for complex cases.
Competition/AntitrustChambers Global GuideAdemir is an excellent professional - very technical, accessible and responsive.
Competition/AntitrustChambers Global Guide
Ranked Individuals at Del Chiaro Pereira Advogados (3)
Brazil
José Del Chiaro Ferreira da Rosa
Competition/Antitrust
View profile Ademir Antonio Pereira Júnior
Competition/Antitrust
View profile 
Luiz Felipe Rosa Ramos
Competition/Antitrust
View profile
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