Energy and natural resources
Praised for it ‘great knowledge of the market and its stakeholders', 'excellent handling of complex and stressful situations' and 'ability to go beyond transactional legal advice', Cuatrecasas' corporate practice has very much come of age since the office's founding in 2019. The practice has built out is client roster from its original private equity and energy cornerstones and today handles transactions and mandates across the full breadth of the market, including infrastructure, healthcare and agribusiness, among others. Key strengths include joint ventures, distressed M&A deals, corporate restructuring, and asset and business transfers. Managing partner Oscar Trelles, who is experienced in leading complex international M&A transactions, co-directs the practice in conjunction with Diego Carrión, who is skilled in private equity and complex corporate advisory work; clients highlight the team's 'closeness', 'commitment' and 'proactivity'. At associate level, seniors Guido Maeda (M&A, corporate and commercial law) and Mariano Peró (corporate transactional matters) are the names to note. Associate Augusto Hostia left the firm for an in-house position in May 2025; Kiomi Osorio also departed in April 2026.
Legal 500 Editorial commentary
- Profile
Mentions
Profile
Position
Partner
Career
Oscar Trelles specialises in M&A and private equity, and has extensive experience in project finance and financing. He has participated in some of the most sophisticated and important national and international transactions, including multi-jurisdictional transactions, in recent years.
Before joining Cuatrecasas, he worked for various international law firms in Lima and New York, including Curtis, Mallet - Prevost, Colt & Mosle and Simpson Thacher & Bartlett.
Mr Trelles has a law degree from Pontificia Universidad Católica del Perú and holds an LLM from Harvard Law School. He is admitted to practice in New York and Peru.
In the academic world, Oscar lectures on M&A and project finance in the Master of Laws at Pontificia Universidad Católica del Perú and in the International Financial Management Programme at the University of Piura.
He also contributes to publications and writes legal articles for different specialist journals and other written media.
Content supplied by Cuatrecasas
Testimonials
Collated independently by Legal 500 research team.
- ‘Great knowledge of the market and its stakeholders, along with excellent handling of complex and stressful situations.’
- ‘A proactive team, always willing and available, in addition to extensive experience in M&A processes and the energy market.’
Key clients
- Yinson Renewables
- Stracon
Work highlights
Advised Ashmore Renewables on the acquisition of 100% of the shares of Ergon Perú and Tre Perú from their shareholders Tozzi Green and Gardini 2002, the acquisition financing, the noteholders’ consent solicitation and all related matters.