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Dr Patrick Sommer, H.E.E.


CMS von Erlach Poncet Ltd.
Dreikönigstrasse 7
P.O. Box
8022 Zurich
Languages French, English, German

Dr Patrick Sommer is Co-Head of the CMS Competition & EU Group. In this position, he jointly leads an international team of more than 170 competition lawyers.

Patrick Sommer focuses on competition law, corporate law and M&A.

Patrick Sommer has graduated from the University of St.Gallen in 1987 and was admitted to the bar in 1989. He has written his doctoral thesis on the relationship of Switzerland to the European Union and completed postgraduate studies at the Collège d’Europe in Brugues with the H.E.E. diploma. He then worked for seven years in the legal department of a Swiss multinational group where he has been promoted to the offices of General Counsel and Secretary of the Board of Directors.

In 2000 Patrick Sommer joined our firm and is a partner since 2002.

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"Patrick Sommer is the head of department and his areas of expertise include conducting audits and the implementation of compliance programmes. He represented Bayer in proceedings surrounding price recommendations for over-the-counter pharmaceuticals."

Chambers and Partners Europe 2016, Switzerland, Competition/Antitrust

"The ‘very professional’ team at CMS provides ‘client-focused advice in a down-to-earth-manner’. Recent work includes representing Rabobank in the Competition Commission investigation regarding alleged collusion to influence the reference rates Libor, Tibor and Euribor. Patrick Sommer heads the ‘very good’ practice."

The Legal 500, Competition, Switzerland, 2016

"Interviewees describe department head Patrick Sommer as an "absolutely excellent lawyer who is very well known in Swiss competition law," adding: "He has a great understanding of business and is known for his pragmatic approach." He recently advised on the Swiss competition authority's investigation into the pharmaceuticals market."

Chambers and Partners, Competition/Antitrust, Switzerland, 2014


1989 - Bar admission
1987 - Law studies at the University of St. Gallen 

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  • Zürcher und Schweizerischer Anwaltsverband
  • Studienvereinigung Kartellrecht
  • International advisory board of the “St. Galler Internationales Kartellrechtsforum”
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  • Mit der Technologie Schritt halten - Neue Zürcher Zeitung, Recht und Gesellschaft, 21 Oktober 2019
  • Competition Commission fines sanitary products wholesalers for price fixing, Competition & Antitrust, International Law Office, 10/2015
  • The Merger Control Review - Switzerland Chapter, sixth edition, 2015 (with Dr Pascal G. Favre)
  • Bilateral cooperation agreement with European Union takes effect, Competition & Antitrust, International Law Office, 06/2015
  • 2012 Antitrust Year in Review, Chapter Switzerland, 04/2013
  • 2011 Antitrust Year in Review, Chapter Switzerland, 04/2012
  • CMS Newsletter Internethandel, 06/2011 2010 Antitrust Year in Review, Chapter Switzerland, 04/2011
  • CMS Newsletter re Horizontals/Information Exchange, 02/2011
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