Noted for its expertise in regulatory and administrative litigation, Prieto Abogados is active in the energy, ports and concessions, sanitation, transport, digital, retail and real estate sectors. Acting for both domestic and international companies, the team is also well versed in advising on public law issues relating to infrastructure and regulated assets, and regulatory strategy for businesses in sectors where current regulation is underdeveloped, including digital platforms, biotechs, and securities and communications companies. Agustín Martorell, who frequently represents clients in proceedings before the administrative authorities, environmental agencies and energy regulators, and competition law-focused Andrea Von Chrismar chair the practice together. Counsel Romina Tobar is highly experienced in environmental and energy matters. Former senior associate Diego Canto left the firm in March 2026.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
- I worked with Diego Canto, and he's an excellent professional—affable, approachable, and, in strictly legal matters, possesses an extraordinary command of the public sector. We also worked with Alberto González and Tomás Landeta, both excellent lawyers.
- Given its full-service nature, it is easy to complement the opinions of the different departments, consolidating a reasoned, multidisciplinary and useful legal opinion.
- The ability to understand and know our company, its history, the industry, its business and its complexities, being able to adapt and deliver practical and grounded advice to our needs, set them apart.
- Their experience, willingness and availability, knowledge of the company, adaptability, and practicality are key strengths. Agustín Martorell and María Jesús Salazar stand out in particular.
- They are very well-prepared, efficient, and conduct thorough analyses of the issues. I would especially like to highlight Agustín Martorell and Romina Garrido for their availability to the client and for seeking business-oriented solutions to complex challenges.
- I think Prieto's main differences are: customer relations, follow-up and diligence in the process.
Key clients
- Caitán
- Decathlon (France)
- Copec, Luval, Esmax, Total Energies, Enex, YPF, LiquiMoly in the oil recycling REP LAW group
- Empresa de Transportes de Pasajeros Metro
- Engie Energía Chile
- DP World San Antonio
- Grupo Patio (Patio Comercial)
- Alianza In
- Empresas CMPC
- Mallplaza
- INACAP
- Grupo Fotones (Libertad)
Work highlights
Representing Caitán in multiple regulatory and environmental proceedings arising from a demolition order issued by the Municipality of Mejillones against intake and pumping infrastructure of a desalination plant supplying water to one of the world’s largest mining operations (owned by BHP).
Advising a group of Chile’s leading fuel and lubricant companies - Copec, Luval, Esmax, Total Energies, Enex, YPF and LiquiMoly - on the public law implementation of the Extended Producer Responsibility regime (Law No. 20,920 – REP Law) as applied to lubricating oils.
Acted for Libertad, a Chilean renewable energy developer belonging to the Spain-based Grupo Fotones, in a high-impact public law and regulatory dispute arising from the declaration of caducity of an Environmental Qualification Resolution (RCA) by Chile’s Environmental Assessment Service (SEA), following a request by the Environmental Superintendency (SMA).
Practice head
Agustín Martorell; Andrea Von Chrismar