COSRO

COSRO is a full-service Brazilian law firm with global reach, delivering high-quality outcomes for clients operating in and through Brazil. Led by senior practitioners with decades of complex, cross-border experience, the firm combines deep institutional knowledge and longstanding client relationships with a technology-enabled, sector-focused approach. COSRO concentrates its capabilities around five core industries, i.e., energy, life sciences and healthcare, agribusiness, infrastructure, and technology, while also serving satellite sectors such as mining, shipping, real estate, decarbonisation, and financial services.

The firm fields more than 60 industry-focused professionals and has advised on over US$20 billion in transactions and US$4 billion in litigation and arbitration matters. COSRO maintains offices in Rio de Janeiro, São Paulo, and Brasília, together with international desks in Shanghai, New York, Washington D.C., Rome, Madrid, and Singapore.

In energy, COSRO advises governments, institutions, funds, and industry leaders across oil and gas, renewables, and biofuels, handling complex regulatory, transactional, and dispute matters. Notable engagements include a US$2.5 billion offshore oil-asset acquisition for an international company, a US$1.91 billion acquisition of a 40% stake in a major offshore oil field, and ICC/LCIA arbitrations exceeding US$2 billion. The firm also structured Brazil's first joint operating agreement for CO2 geological injection and advised on a US$2.5 billion SAF and renewable-diesel project for an international energy group.

In life sciences, COSRO covers the full lifecycle from molecule to market, including cross-border M&A, ANVISA regulatory compliance, clinical trials, and digital-health governance. Representative work includes a global biopharmaceutical company's acquisition of a specialized pharma consulting firm and related multi-regional platform integration across 45+ countries, and a global industrial technology company's US$2.7 billion carve-out acquisition of a sterilization products business from a multinational healthcare conglomerate.

In infrastructure, the firm advises on PPPs, concessions, and project finance across sanitation, ports, airports, transport, and power, leveraging financing structures backed by BNDES, FINEP, and multilateral institutions. The firm's core practice areas also span corporate/M&A, litigation and arbitration, project finance, regulatory and government affairs (including engagement with ANP, ANVISA, IBAMA, and ANEEL), tax, commercial contracts, environmental, emerging growth and venture capital, and labour and employment.

COSRO differentiates itself through an integrated platform combining sector mastery, an international network across four continents, and AI-powered legal tools including Harvey, JusMundi, Opus2, and other proprietary technology applications. The firm is a signatory to the UN Global Compact, maintains a workforce that is over 70% female with a dedicated DEI committee, and pursues pro bono initiatives focused on women's health, public health, education, and climate change. COSRO is ranked by leading directories across the world.