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Tomasz Siemiątkowski

Tomasz Siemiątkowski
Name and surname

Tomasz Siemiątkowski

PhD degree in Economics, PhD (habilitation) degree in Law
Professional titles


  • English
  • Polish
  • Russian
  • Banking law
  • Business law
  • Capital markets and stock exchange
  • Civil law and civil contracts
  • Commercial law and commercial contracts
  • Company law
  • Energy law and raw materials
  • International arbitration
  • International commercial law and international commercial contracts
  • International investment arbitration
  • Investment arbitration
  • Investment projects
  • Mergers and acquisitions
  • Pharmaceutical law
  • Securities
  • Sports law
Year of birth







Professor at SGH Warsaw School of Economics (Head of the Business Law Department) and at Cardinal Stefan Wyszynski University in Warsaw, Faculty of Law and Administration. Member of Civil Law Codification Commission (for the term of 2015-2019, dissolved in December 2015). He organised, and since inception has been Director of, Postgraduate Studies “Academy of Corporate Law” at SGH Warsaw School of Economics.

Between 1999-2011, he lectured in corporate governance (from the perspective of Polish and American law) at the MBA Programme co-organised by SGH Warsaw School of Economics and University of Minnesota (he was awarded WEMBA Outstanding Instructor First Prize in 2007and WEMBA Outstanding Instructor Second Prize in 2008 and 2010).

He visited renowned foreign academic centres, including the University of Minnesota, Carlson School of Management (Visiting Professor, 1999), University of California – Berkeley, Boalt Hall School of Law (Visiting Scholar – scholarship holder of the Foundation for Polish Science, 2002 – 2003), and the Max-Planck-Institut für Ausländisches und Internationales Privatrecht in Hamburg (Visiting Fellow – 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 a Kosciuszko Foundation Fellowship from the University of California, Berkeley (2004). Participant of international conferences and symposiums (including at Columbia University, Hong Kong Polytechnic University, New York University, Princeton, Stanford and Tokyo University).
Professional competencies of Prof. Siemiątkowski in legal practice pursued since 2009 in Głuchowski Siemiątkowski Zwara Law Firm, and earlier in Siemiątkowski Law Firm and two American law firms, are focused on the areas of corporate law, corporate governance, M&A and restructuring, capital market law, arbitration pharmaceutical law and energy sector. He has participated in the preparation of IPO of the first company organized under the 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 the case regarding introduction of the obligation to apply the official margins and the principles of pricing of imported medical drugs, obtaining the verdict in favour of his client. He has also been a member of the team to develop the first concept of dividend payment in bonus shares in the Polish public market.

He served as Member of the Supervisory Board of the following companies: PKO BP S.A. (and as Chairman of the Board’s Audit Committee), PLL LOT S.A. and Polbank S.A. In 2013 – 2017, he was Chairman of the Supervisory Board of Polska Grupa Zbrojeniowa S.A. He also served as Member of the Supervisory Board of the Royal Bank of Scotland Polska S.A. (2016 – 2019), as well as Vice-President of the Council of the Foundation for the Polish Football of the Polish Football Association and Member of the Polish-American Oncology Foundation.

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 Member of the Task Team, appointed by the Chairman of the Civil Law Codification Commission, which prepared a draft law introducing a European company into the Polish legal system (in this team, he was responsible for developing a regulation on the monistic system of corporate governance), and then participated as a government expert in parliamentary work on this draft law. 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/EC 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 company law team. Since 2011, he has been 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.

Prof. Siemiątkowski is a judge of the Stock Exchange Court at GPW S.A. (Warsaw Stock Exchange) and an arbitrator of the Court of Arbitration at Polish Commercial Chamber in Warsaw, Court of Arbitration of the Polish Confederation of Private Employers “Lewiatan”. He is also a member of the American Law & Economics Association.
In 2016, he was included by the Dziennik Gazeta Prawna daily on the “List of 50 Most Influential Lawyers in Poland” and was awarded with the “Golden Paragraph”, granted for outstanding achievements in the field of law (for activities for the benefit of law and economy).

In the “Ranking of Law Firms 2018” of “Rzeczpospolita” daily, he took the first place as a leader in the field of “Company Law and Commercial Law”. In 2019, he was nominated in this field.


He authored two monographs:

  • Prokura w spółkach prawa handlowego (LexisNexis, 1999)
  • Odpowiedzialność cywilnoprawna w spółkach kapitałowych (C.H. Beck, 2007),

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);

co-author of System Prawa Prywatnego:

vol. 16 Prawo spółek osobowych ed. by A. Szajkowski


vol. 17 – Prawo spółek kapitałowych ed. by S. Sołtysiński

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