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Borja
Chastang

Senior Associate

BChastang@mlab-abogados.com

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Education
  • Brussels School of Competition (LLM in Competition Law and Economics) 2024
  • The George Washington University in collaboration with Concurrences Academy (Competition Compliance Certificate) 2023
  • King’s College of London (Postgraduate Diploma “Economics for Competition Law”) 2019
  • Universidad de Córdoba (Master‘s Degree for Access to the Legal Profession) 2017
  • Instituto de Estudios Bursátiles de Madrid (Specialisation Programme in European and Spanish Competition Law) 2016
  • Université Libre de Bruxelles (LL.M. in European Law) 2015
  • Universidad de Córdoba (Bachelor’s Degree in Law) 2013
Languages

Spanish, English and French

Borja Chastang Reyes is a senior associate of the firm, which he joined in 2017.

He specialises in Competition Law, Regulation and European Union Law. His experience includes advising clients on matters relating to cartels, abuse of dominant position, merger control, damages claims related to competition law infringements and the design and implementation of competition law compliance programmes.

His professional practice covers a wide range of sectors, among which are commercial distribution, consumer goods, media, construction, the digital economy or public procurement.

  • Colegio de Abogados de Madrid (Madrid Bar)
  • International Association of Young Lawyers (AIJA)
  • Asociación Española para la Defensa de la Competencia (AEDC)
  • Asociación Española para el Estudio del Derecho Europeo (AEDEUR)
  • Club Español e Iberoamericano del Arbitraje

  • “The exclusion from public procurement procedures for breaches of competition law: the Spanish Competition Authority’s decision in Eólica del Alfoz” in Comunicaciones en Propiedad Industrial y Derecho de la Competencia, nº 106, 2025, pp. 165-185 (co-authored with Alfonso Rincón).
  • “Merger Control and Competition Law Compliance Programmes: The Recent Clearance Decision of the Spanish Competition Authority in C/1586/25 Formigons.Cat JV”, in Kluwer Competition Law Blog, January 7, 2026 (co-authored with Alfonso Rincón).
  • “Comentario al Borrador de Directrices del Artículo 102 TFUE”, in Anuario de Derecho de la Competencia 2025, Civitas, pp. 273-297 (co-authored with Rafael Allendesalazar).
  • “The New Edition of the Antitrust Compliance Toolkit of the International Chamber of Commerce”, in Kluwer Competition Law Blog, February 24, 2025 (co-authored with Alfonso Rincón).
  • “Spain: The decisional practice of the Competition Authority with regard to competition compliance programmes”, in Concurrences, nº 3, 2024, pp. 188-192 (co-authored with Alfonso Rincón).
  • “A New Episode in the Assessment of Compliance Programmes by the Spanish Competition Authority: The CNMC’s Decision in Suministro de Alimentos”, in Kluwer Competition Law Blog, August 1, 2024 (co-authored with Alfonso Rincón).
  • “Las funciones arbitrales de la Comisión Nacional de los Mercados y la Competencia”, in Anuario de Arbitraje, Civitas, 2024, pp. 57-67 (co-authored with Santiago Martínez Lage).
  • “Otro nuevo episodio en la saga Micula con ocasión del Brexit. La Sentencia del Tribunal de Justicia en el asunto C-516/22, Comisión/Reino Unido”, in La Ley Unión Europea, nº 124, 2024.
  • “Arbitraje y Derecho de la Unión Europea: ¿qué hay de nuevo en la reciente sentencia del Tribunal de Justicia de la Unión Europea en Mytilinaios?”, in Revista La Ley Mediación y Arbitraje, nº 18, 2024.
  • “La valoración de los programas de cumplimiento por la CNMC y las autoridades autonómicas”, in Anuario de Derecho de la Competencia 2023, Civitas, 2023, pp. 103-123 (co-authored with Alfonso Rincón).
  • “El concepto de órgano jurisdiccional a efectos del art. 267 TFUE. Las Conclusiones de la Abogada General Capeta en el asunto C‐115/22, NADA”, in La Ley Unión Europea, nº 118, 2023.
  • “El arbitraje y el Derecho de la Unión Europea”, in Derecho público, entre el poder y un audaz desafío por el estado de derecho. Libro Homenaje al Profesor José Eugenio Soriano García, Tomo 2, Atelier, 2023, pp. 549-572 (co-authored with Santiago Martínez Lage).
  • “El arbitraje y la Unión Europea: últimos pronunciamientos (2017-2022)”, in De Iure Mercatus. Libro Homenaje al Prof. Dr. h. c. Alberto Bercovitz Rodríguez Cano, Tirant lo Blanch, 2023, pp. 3235-3253 (co-authored with Santiago Martínez Lage).
  • “La valoración de los programas de cumplimiento por la CNMC”, in Anuario de Derecho de la Competencia 2022, Civitas, 2022, pp. 143-158.

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