Marcin Kolasiński

Principal

Attorney-at-Law

I have extensive experience in matters related to competition and consumer protection, state aid, combating unfair competition, public procurement, compliance, product safety, legal issues in regulated sectors and corporate advice.

I worked for the Office of the Committee for European Integration, where I was involved in the process of implementing EU law into the Polish legal system. I then worked for the Office of Competition and Consumer Protection, where I was Deputy Director of the Competition Department. At that time, I gained experience at the European Commission’s Directorate General for Competition. I then worked for more than eight years at the Baker & McKenzie law firm, where, as a partner heading the competition law and regulatory practice, I represented clients before the President of the OCCP, the European Commission, and both Polish and European courts.
I am a member of the Polish Competition Law Association, the Polish Association of Law and Economics and the Centre for Antitrust and Regulatory Studies. I am also a non-governmental adviser within the International Competition Network.

I am a co-author of a commentary on the Act on Competition and Consumer Protection, edited by Tadeusz Skoczny, published by C.H. Beck, as well as the author of numerous publications in the daily press, as well as industry and specialist legal publications.

For years, I have been recommended by both Polish (Rzeczpospolita) and international (Chambers Europe and Legal 500) legal rankings as a leading expert in competition law in Poland.

Języki

Polish, English

Wyróżnienia

  • 2025

    • Rzeczpospolita Law Firm Ranking 2025

      Marcin Kolasiński – recommended in the field of competition and antitrust law.

    • The Legal 500 EMEA 2025

      • Category:

        Competition/Antitrust

      • Award:

        Recommended Lawyer

    • Chambers Europe 2025

      • Category:

        Competition/Antitrust

      • Award:

        Band 3

      Marcin Kolasiński of Kieszkowska Rutkowska Kolasiński has a strong competition law practice and frequently defends clients in investigations into allegations of behavioural infringements, as well as representing them in subsequent appeals. He also offers merger clearance expertise and compliance advice.

      Strengths

      “I appreciate that whenever I call Marcin Kolasiński, he’s there. I really appreciate his availability, and his practical knowledge and business understanding.”

      “I really appreciate Marcin. He is a specialist in his field who is very responsive and practical. “

      “I feel that he likes working with me and our company, which is a very important aspect for us in building a great client-attorney relationship.”

      “He responds super fast and is business-oriented. He provides to-the-point advice.”

      “He is very experienced, with amazing and practical knowledge.”

       

  • 2024

    • The Legal 500 EMEA 2024

      • Category:

        Competition/Antitrust

      • Award:

        Recommended Lawyer

      ‘Marcin Kolasiński is a top-notch expert who is focused and determined.’

    • Chambers Europe 2024

      • Category:

        Competition/Antitrust

      • Award:

        Band 3

      Marcin Kolasiński of Kieszkowska Rutkowska Kolasiński frequently assists clients with competition law compliance mandates, particularly regarding distribution strategies. He also acts for clients on dawn raids and advises on merger clearance notifications.

    • Rzeczpospolita Law Firm Ranking 2024

      • Category:

        Competition and Antitrust Law

      • Award:

        Recommended Lawyer

    • Who’s Who Legal 2024

      • Category:

        Competition and Franchising

      • Award:

        Recommended Lawyer

      • Kategoria:

        Franchising

      • Wyrożnienie:

        Rekomendowany prawnik

  • 2023

    • The Legal 500 EMEA 2023

      • Category:

        Competition/Antitrust

      • Award:

        Recommended Lawyer

    • Chambers Europe 2023

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

    • Who’s Who Legal 2023

      • Category:

        Franchising and Competition

      • Award:

        Recommended Lawyer

  • 2022

    • The Legal 500 EMEA 2022

      • Category:

        Competition/Antitrust

      • Award:

        Rekomendowany prawnik

      “(Marcin Kolasiński) is very engaged personally in supporting the clients. He always wants to understand the context and cares about the practical aspects of his advice. Very trustful partner.’

    • Chambers Europe 2022

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      Marcin Kolasiński is a notable market presence who advises pharmaceutical companies on a variety of competition topics. He assists with compliance, including distribution agreements, and represents companies in antitrust investigations.

      One client praises his “practical approach and wide knowledge.”

  • 2021

    • The Legal 500 EMEA 2021

      • Category:

        Competition/Antitrust

      • Award:

        Rekomendowany prawnik

      ‘Marcin Kolasiński is responsive, with the ability to clearly define what is the key legal issue and also to explain it to members of business organisations.’

    • Chambers Europe 2021

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      ”Marcin Kolasiński advises many pharmaceutical companies on a variety of competition topics. He assists with compliance, including distribution agreements, and represents companies in antitrust investigations. He is dedicated, a client says, adding: it’s a pleasure to work with him.”

    • Rzeczpospolita Law Firm Ranking 2021

      • Category:

        Competition and Antitrust Law

      Marcin Kolasiński recommened in Competition and Antitrust Law.

    • Who’s Who Legal 2021

      • Category:

        Franchising and Competition

      • Award:

        Global Leader

  • 2020

    • The Legal 500 EMEA 2020

      • Category:

        Competition/Antitrust

      • Award:

        Recommended Lawyer

      Competition, consumer protection and public procurement expert Marcin Kolasiński is noted for his experience in merger control proceedings before Polish and EU authorities.

      „Marcin Kolasiński has exceptional knowledge in various competition legal issues and the international environment”.

    • Chambers Europe 2020

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      Marcin Kolasiński remains the first port of call for pharmaceutical companies seeking antitrust expertise. He handles abuse of dominant position and merger control proceedings, as well as advising on distribution agreements and compliance. “He combines analytical skills with excellent presentation skills. He makes our lives easier,” a client says, while another source adds: “He is capable of dealing with difficult questions.”

    • Who’s Who Legal 2020

      • Category:

        Franchising and Competition

      • Award:

        Future Leader

    • Expert Guides 2020

      • Category:

        Competition and Anitrust

      • Award:

        Recommended Lawyer

  • 2019

    • The Legal 500 EMEA 2019

      • Category:

        Competition/Antitrust

      • Award:

        Recommended Lawyer

    • Chambers Europe 2019

      • Category:

        Competition / Antitrust

      • Award:

        Band 2

      Marcin Kolasiński remains a first port of call for pharmaceutical companies seeking antitrust expertise. He has broad experience in handling matters such as abuse of dominant position, merger control proceedings and day-to-day compliance. A client reports that his advice is “straight to the point, concise and very focused”.

  • 2018

    • The Legal 500 EMEA 2018

      • Category:

        Competition / Antitrust

      • Award:

        Recommended Lawyer

    • Chambers Europe 2018

      • Category:

        Competition / Antitrust

      • Award:

        Band 2

      Marcin Kolasiński is appreciated by clients for his business acumen and his ability to “communicate risks quickly and effectively.” One source notes his “great knowledge and attitude towards clients.” He is adept at handling antitrust investigations, consumer protection issues and abuse of dominant position.

    • Rzeczpospolita Law Firm Ranking 2018

      • Category:

        Competition/Antitrust

      Marcin Kolasiński – recommended in Competition/Antitrust

  • 2017

    • Chambers Europe 2017

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      Practice head Marcin Kolasiński is a well-established name in Polish competition law, with a solid track record in merger control, antitrust proceedings and regulatory compliance matters. Sources praise his “great strategic and tactical mind,” with another client adding: “I like his approach to problems, whether business or my personal concerns. I can always rely on him.

    • Rzeczpospolita Law Firm Ranking 2017

      • Category:

        Competition/Antitrust

      Marcin Kolasiński – recommended in Competition/Antitrust

  • 2016

    • Chambers Europe 2016

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      Department head Marcin Kolasinski enjoys a long-standing reputation for competition law matters. “I like his understanding of customer needs, speed in action and clarity in advice. He weighs the risks and objectively presents the pros and cons,” a client says. He has strong practical experience of the pharmaceutical sector in particular.

    • Rzeczpospolita Law Firm Ranking 2016

      • Category:

        Competition and Antitrust Law

      Marcin Kolasiński was recommended in the Competition and Antitrust Law category

    • Who’s Who Legal 2016

      • Category:

        Competition

    • Corporate LiveWire Awards 2016

      Marcin Kolasiński – Competition Lawyer of the Year – Poland

    • Expert Guides 2016

      • Category:

        Competition/Antitrust

  • 2015

    • Chambers Europe 2015

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      Marcin Kolasinski of Kieszkowska Rutkowska Kolasiński is best known for advising pharmaceutical clients on day-to-day competition issues concerning distribution, compliance and advertising. He is recommended by clients as a “sharp and experienced lawyer with excellent knowledge of the regulatory environment in Poland.”

      • Kategoria:

        Competition/Antitrust

      • Wyróżnienie:

        Band 2

    • Who’s Who Legal 2015

      • Category:

        Competition

  • 2014

    • Chambers Europe 2014

      • Category:

        Competition/Antitrust

      • Award:

        Band 2

      He is proactive and very much liked by business colleagues, and he can really explain matters in a way that people can understand.” He has almost ten years’ experience in advising clients in this area.