The competition and antitrust team at Ritch, Mueller y Nicolau, S.C. advises on a broad range of competition matters, including cartel investigations, merger control and regulatory compliance, and regularly represents clients before the CNA and other competition authorities. The practice is jointly led by Octavio Olivo Villa and James Ritch, whose practices combine extensive experience in merger reviews, regulatory compliance and enforcement matters with a strong focus on investigations. Associate Marta Loubet advises on competition and antitrust matters across a range of regulated sectors, while Julia Fuentes is active on amparo proceedings, dominance investigations and merger filings, including those with a cross-border dimension. The practice has been further strengthened by the arrival of Diego González Altamirano, who joined from Conesa y Moreno Abogados in July 2026 and brings 15 years of experience across the full spectrum of competition matters. Associate Tania Manzur Hasbun joined the firm alongside Altamirano.
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Testimonials
Collated independently by Legal 500 research team.
- Octavio Olivo Villa, Julia Fuentes Andersson, Santiago Carrillo Cattori - are the main people who support us with these issues.
- An excellent team with extensive experience in competition and antitrust law. They are always up-to-date on global issues and the specifics of each of our transactions, which, combined with the dedication and hard work of the Ritch team, results in high-quality and effective legal services.
- Ritch Mueller's competition and antitrust team stands out for combining deep technical and regulatory expertise with agility and attention to detail that few firms can match.
- The combination of exceptional client service with a proactive approach and follow-up that surpasses what other firms typically offer. The team doesn't wait for clients to ask questions; they stay constantly informed about every matter, proposing solutions before problems escalate and ensuring clients are always fully aware of the status of their cases.
- The team's strength lies in its combination of technical excellence, strategic judgment, and the ability to inspire confidence in clients on highly sensitive matters. Their lawyers stand out for their analytical depth, professional integrity, and ability to translate complex issues into clear, actionable recommendations that are well-balanced from both a regulatory and commercial perspective.
- The competition and antitrust practice at Ritch, Mueller y Nicolau, S.C. stands out for its strong technical expertise, strategic judgment, and ability to handle complex matters with a practical, results-oriented approach. Their advice is clear, well-structured, and useful for internal decision-making. They don't just offer technical opinions; they help assess risks, prioritize tasks, and develop viable strategies for complex scenarios.
Key clients
- Alójica and MVWC
- Baja Aqua-Farms
- BG Hotels
- Artha Capital
- Viva Aerobus
- Brookfiled Corporation
- Affinius Capital
- Ainda, Energía & Infraestructura
- Arroyo Energy Group
- Promotora y Operadora de Infraestructura (PINFRA)
Work highlights
Acted for Viva in the completion of its agreement to pursue a merger of equals with Volaris to form a new Mexican airline group under a holding structure.
Represented Promotora y Operadora de Infraestructura (PINFRA) in obtaining antitrust approval from COFECE for the sale to Terminal Investment Limited of 100% of the outstanding shares of its subsidiary Infraestructura Portuaria Mexicana.
Represented BofA Securities, Citigroup Global Markets, and J.P. Morgan Securities in a$12bn transaction that included the first-ever sovereign issuance of pre-capitalised securities (P-Caps), in which the antitrust team provided merger notificabililty advice.
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Marta Loubet Mezquita
Tania Manzur Hasbun
Practice head
Octavio Olivo Villa; James E. Ritch
Other key lawyers
Marta Loubet; Julia Fuentes