Tomasz Siemiątkowski
Chairman of the Supervisory Board
Professor at SGH Warsaw School of Economics, Tomasz Siemiątkowski, PhD (habilitation), Attorney – a graduate of one of the oldest high schools in Poland (Marshal Stanisław Małachowski High School, with a history of almost 850 years, in Płock – his childhood and youth hometown). In 1994 he graduated summa cum laude from the Faculty of Law and Administration of the University of Warsaw, and since 1999 he has been a member – as an attorney - of the Warsaw Bar Association. He holds a PhD degree in Economics and a PhD (habilitation) degree in Law and is the professor at the Szkoła Główna Handlowa in Warsaw (SGH Warsaw School of Economics), also is the Head of the Commercial Law Department. In the years 2000 - 2021 he was an academic at the Cardinal Stefan Wyszynski University in Warsaw in the Faculty of Law and Administration (and from 2010 he has held the position of associate professor). Member of the Civil Law Codification Commission (for the term of 2015 - 2019, dissolved in December 2015). He established and, since then, has been the Director of Postgraduate Studies Academy of Corporate Law at the SGH Warsaw School of Economics.
Between 1999 – 2011 he lectured in corporate governance (from the perspective of Polish and American law) for the MBA Programme co-organised by the SGH Warsaw School of Economics and the University of Minnesota (he was awarded the WEMBA Outstanding Instructor First Prize in 2007 and the WEMBA Outstanding Instructor Second Prize in 2008 and 2010). In 2012, his work was also recognised by his Polish students and he received Inspiration of the Year, a title granted by the Independent SGH Students’ Monthly Magazine “MAGIEL”.
He visited renowned foreign academic centres: the University of Minnesota, the Carlson School of Management (Visiting Professor, 1999), the University of California - Berkeley’s Boalt Hall School of Law (Visiting Scholar and scholarship holder of the Foundation for Polish Science, 2002 – 2003) and the Max-Planck-Institut für Ausländisches und Internationales Privatrecht in Hamburg (Visiting Fellow and MPI scholarship holder, 2004). As part of his academic work abroad he studied American Corporate Governance under Prof. R. Buxbaum (Boalt Hall School of Law, UC Berkeley) and Comparative Corporate Governance under Prof. K. J. Hopt (MPI, Hamburg). He also received the Kosciuszko Foundation Fellowship which covered his time at the University of California, Berkeley (2004). He participated in many international conferences and symposia (among others, at Columbia University, Hong Kong Polytechnic University, New York University, Princeton University, Stanford University and Tokyo University).
Professional capabilities of Prof. Siemiątkowski within his attorney activities, conducted since 2009 at the Głuchowski Siemiątkowski Zwara Law Firm, and earlier at Dr Tomasz Siemiątkowski Law Firm, two American law firms and also at dr hab. T. Siemiątkowski, Adwokaci i Doradcy law firm – are focused on areas of corporate law, corporate governance, M&A and restructuring, capital market law, arbitration, court commercial disputes and also health care law. He participated i.a. in the preparation of an IPO of the first company organized under foreign law whose stocks were admitted to public trading in Poland and represented the Polish Confederation of Private Employers “Lewiatan” in the proceedings before the Constitutional Tribunal in a case regarding the introduction of the obligation to apply official margins and principles of pricing in the circulation of imported medical drugs, obtaining a verdict in favour of his client, and also participated in developing and executing of the concept, the first one in the Polish public market, of dividend payment in bonus shares.
He served as the Member of the Supervisory Board of i.a. PKO BP S.A. (and the Chairman of the Board’s Audit Committee), PLL LOT S.A. and Polbank S.A. Between 2013 – 2017 he was the Chairman of the Supervisory Board of Polska Grupa Zbrojeniowa S.A. (Polish Armaments Group). He also served as the Member of the Supervisory Board of the Royal Bank of Scotland Polska S.A. (2016 – 2019). Between 2022-2024 he served as the Member of the Supervisory Board of SPR Wisła Płock S.A. (elected by its owner - the municipality of Plock), and also in the years 2021- 2025 he was the Chairman of the Polish Football Association’s Football Arbitration Court (Piłkarski Sąd Polubowny PZPN). Currently, he is the Chairman of the Council of the FEDE Foundation of Energy for Europe, the Chairman of the Council of Democracy Foundation (Fundacja Demokracja) and the Vice-Chairman of the Council of the Polish Football Association’s Foundation of Polish Football. Between February 2024 and August 2025 he served again as the Member of the Supervisory Board of Polska Grupa Zbrojeniowa S.A. (as the Vice-Chairman). Currently he is the Chairman of the Supervisory Board of PKO BP S.A.
From October 2024 until June 2025 he was a Member of an Advisory Team by the Minister of Justice re. the issues of European Union Law (in connection with the preparation for the second presidency of Poland in the Council of the European Union and also during the presidency). From October 2025 he has been a Member of the Team of Experts of the Minister of State Assets.
Co-author of the draft law amending the Commercial Companies Code and Member of the Expert Team working under the leadership of Prof. S. Soltysinski (2001 – 2003). Between 2003 – 2005 he was a Member of the Task Team, appointed by the Chairman of the Civil Law Codification Commission, which prepared draft law introducing a European company into the Polish legal system (while on the team, he was responsible for developing a regulation on the monistic system of corporate governance), and then participated as the Government Expert in parliamentary works on the draft regulation. In December 2009 he was appointed by the Chairman of the Civil Law Codification Commission to the Permanent Task Team of the Civil Law Codification Commission for the amendment of the Commercial Companies Code (co-author of the draft implementation of Directive 2009/109/WE concerning reporting and documentation requirements in the case of mergers and divisions). In 2011, he was appointed by the Chairman of the Civil Law Codification Commission to the companies law team. Since 2011, he has been a Member of the Legislative Committee of the General Bar Council (Chairman of the Business and Commercial Law Team of this committee). Prof. Siemiątkowski was also the initiator and co-author (together with Attorney R. Potrzeszcz and Prof. P. Wiórek) of the Act on the Control of Certain Investments, adopted by the Polish Parliament, almost unanimously, in 2015. He also served as a legal advisor in the social action for historical justice (the so-called “Appeal 141”) which, between July 2020 and March 2021, led to the adoption of a law amending the act on anti-communist opposition activists and people repressed for political reasons. The said action that had been initiated and conducted by activists of the former anti-communist opposition (J. M. Goliszewski, L. Stall and G. Kostrzewa – Zorbas) facilitated the implementation of social security premiums for periods of active opposition, and therefore, an increase in the basis for calculating the amounts of pension and rent for former opposition activists.
He is an arbitrator of the Court of Arbitration of the Polish Commercial Chamber in Warsaw and of the Court of Arbitration of the Polish Confederation of Private Employers “Lewiatan,” as well as a member of the American Law & Economics Association.
He authored two monographs: Prokura w spółkach prawa handlowego (LexisNexis, 1999) and Odpowiedzialność cywilnoprawna w spółkach kapitałowych (C.H. Beck, 2007) and is the co-author and co-editor of the four-volume Commentary on the Polish Code of Commercial Companies, published by LexisNexis, comprising – Spółki osobowe (2011), Spółka z ograniczoną odpowiedzialnością (2011), Spółka akcyjna (2012), Łączenie, podział i przekształcanie spółek (2011). He also co-authored System Prawa Prywatnego: vol. 16 – Prawo spółek osobowych ed. by A. Szajkowski and vol. 17 – Prawo spółek kapitałowych ed. by S. Sołtysiński, and moreover, he authored or co-authored several dozen articles on civil and commercial law, published, among others, in the law journals “Palestra,” “Przegląd Prawa Handlowego,” “Przegląd Sądowy” and “Przegląd Ustawodawstwa Gospodarczego.” In addition, he serves as the Chairman of the Editorial Board of the quarterly “Corporate Governance Review.”
In 2016, he was included by the Dziennik Gazeta Prawna daily on the “List of the 50 Most Influential Lawyers in Poland” and was awarded the “Golden Paragraph” granted for outstanding achievements in the field of law (for activities for the benefit of law and economy).
In 2022, he received from the Rzeczpospolita daily the special Award for Pro Bono Activity in Defense of the Freedom of Media in Poland (from the laudation: “for engagement in defending the freedom of speech and activity serving to underscore the risks connected to the so-called LEX TVN entering into force”).
In the 2018, 2020, 2021 and 2022 editions of the “Ranking of Law Firms” of the Rzeczpospolita daily, he was awarded the first prize as a leader in the field of “Company Law and Commercial Law.” In 2023, 2024 and 2025 an awarded leader in the field of “Company and Commercial Law, Mergers and Acquisitions”.
In 2026 he placed fourth in the Ranking of “50 the most influential lawyers of 2025” published by the Dziennik Gazeta Prawna daily.
Privately, he is an avid fan of the Legia Warszawa Football Club and his interests include the history of football, the history of politics, tennis, and running.
First and foremost, however, he is the husband of Renata and the father of Ewa and Adam.
Independent Member of the Supervisory Board.
