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Profile picture of Dr. Heyo Maas

Dr. Heyo Maas

Rechtsanwalt, Senior Associate

About Heyo

Heyo is a Senior Associate who is specialised in M&A and corporate law with more than 12 years of experience. He regularly advises German and international clients in complex national and cross-border M&A transactions with a particular focus on the wholesale and retail sector. He has published various books on corporate and capital markets law.


Associate at Pinsent Masons  since 2018

Lawyer with the legal arm of an international Big4 audit firm, Düsseldorf, 2008

Lawyer at a magic circle international law firm, Düsseldorf, 2006

Doctorate in law, Justus Liebig University Gießen, 2008

Admission as Rechtsanwalt, 2006

Studied law at Justus Liebig University Gießen and University of Warwick (England)


  • Advising a leading international food wholesaler on a regular basis with regard to a group reorganisation as well as a large number of acquisitions of legal entities and entering into joint ventures
  • Advising an international beverage producer and wholesaler on a regular basis on the acquisition of participations in Germany as well as on questions regarding corporate and commercial law
  • Advising a leading US-American manufacturer of packaging for the beverage industry with regard to a group reorganisation in Germany
  • Advising a leading Japanese technology group on numerous acquisitions of sales and distribution companies and software businesses as well as on corporate reorganisations
  • Advising a leading Danish service provider group in the area of facility management with regard to a group reorganisation in Germany
  • Advising a leading English industrial group with regard to a group reorganisation in Germany
  • Advising the German subsidiary of a Japanese automobile manufacturer with regard to the sale of its IT division
  • Advising numerous international industrial groups on domestic and international M&A transactions both buy-side and sell-side

Publications/Speaking Engagements

  • Das Recht der Wertpapieremissionen (mit Prof. Dr. Jens Ekkenga), Erich Schmidt-Verlag, 2006
  • Zwangsdelisting und Anlegerschutz: Der Schutz der Börsennotierung vor gesellschaftsfremden Maßnahmen, Peter Lang-Verlag, 2009
  • Heyo is visiting lecturer at Hochschule Fresenius, Cologne, and University Duisburg-Essen