
Castellán Abogados' corporate & M&A department is a cornerstone of the firm, and offers strategic legal solutions to both local and international clients across a variety of industries, including real estate, tech, automotive and agribusiness, serving prominent clients such as Kia Motors, GrandVision and SADA Group. Led by Santiago Castellán, the team excels in managing M&A transactions, corporate compliance and risk mitigation. Maria Lucia Acosta enhances the practice with her expertise in complex transactions, risk management and cross-border deals. Associate Mariana Fagioli has rapidly become a key player in corporate governance and transactional law, making significant contributions to high-profile M&A deals and the firm’s international expansion. Notably, the firm is also a member of the growing B-Conex Latam network, which currently includes partner firms in Chile and Argentina.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Billing & efficiency
Client satisfaction: NPS ®
Testimonials
Collated independently by Legal 500 research team.
- ‘The corporate and M&A practice is essentially distinguished by the technical expertise of its professionals, their in-depth knowledge of the subject matter, and their experience and efficiency, all driven by results. María Lucía Acosta and Santiago Castellán also demonstrate high-level management acumen, which adds value and sets them apart from other law firms.'
- ‘Above all, their specialised knowledge, human qualities, and professional ethics. Their immediacy with clients, seeking to understand the interests at stake, makes their professional practice stand out in the market.'
Key clients
- Sada Group
- Aleph Group
Work highlights
Provided comprehensive corporate advisory to GrandVision (Luxottica Group) in Uruguay, leading governance restructuring, intercompany share transfers and compliance enhancement to support its regional integration under EssilorLuxottica.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.

Practice head
Santiago Castellán
Other key lawyers
María Lucía Acosta; Mariana Fagioli
