Home / People / Dr Patrick Sommer
Portrait of Patrick Sommer

Dr Patrick Sommer, H.E.E.


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

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

Memberships & Roles

  • Zürcher und Schweizerischer Anwaltsverband
  • Studienvereinigung Kartellrecht
  • International advisory board of the “St. Galler Internationales Kartellrechtsforum”
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Awards & Rankings

  • Chambers and Partners | Competition/Antitrust, Switzerland, 2021 | Europe | Band 3
  • IFLR 1000 | M&A, Switzerland, 2021 | Notable Practitioner
  • Who's Who Legal | Competition, Switzerland, 2021 | National Leader
  • Leaders League | Dispute Resolution - Competition Law & Antitrust, Switzerland, 2021 | Excellent
  • Leaders League | Healthcare, Pharmaceuticals & Biotech | Life Sciences, Switzerland, 2021 | Leading
  • Leaders League | Competition Litigation, Switzerland, 2021 | Excellent
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  • Welche Zielsetzungen sind mit einer rechtlichen Due Diligence verbunden?, Oaklins Switzerland, M&A im Verwaltungsrat, June 2021
  • Switzerland introduces the concept of relative market power and restricts geoblocking, CMS Law-Now, 22 March 2021 (co-authors: Marquard Christen, Fabian Martens, Hadi Mirzai)
  • 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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1989 - Bar admission
1987 - Law studies at the University of St. Gallen 

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Our Swiss Com­pet­i­tion Team – Highly re­com­men­ded in the 18th edi­tion of...
We are proud to an­nounce that our com­pet­i­tion team un­der head Patrick Som­mer and part­ners Marquard Christen, Stefan Brunnsch­weiler, Pas­cal Favre and Alain Raemy is highly re­com­men­ded by Glob­al Com­pet­i­tion...


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1. What is the gen­er­al le­gis­lat­ive frame­work reg­u­lat­ing pack­aging and plastic waste in your jur­is­dic­tion? Plastic waste and pack­aging is only scarcely reg­u­lated in Switzer­land. The Fed­er­al Coun­cil...
The Fed­er­al Su­preme Court's judg­ment in the mat­ter "Hors-Liste Medika­mente...
On 21 April 2021, the Fed­er­al Su­preme Court pub­lished a judg­ment against Pf­izer re­gard­ing the sanc­tion or­der of the Com­pet­i­tion Com­mis­sion (COMCO) in the mat­ter Hors-Liste Medika­mente (Pre­isem­p­fehlun­gen)...
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Switzer­land in­tro­duces the concept of re­l­at­ive mar­ket power and re­stricts...
On Fri­day, 19 March 2021, the Swiss par­lia­ment ad­op­ted in its fi­nal vote the amended par­lia­ment­ary counter-pro­pos­al to the pop­u­lar ini­ti­at­ive "Stop the high price is­land - for fair prices". This counter-pro­pos­al...
CMS Switzer­land ranked in Cham­bers and Part­ners Europe Guide 2021
We are de­lighted to an­nounce that 13 of our law­yers across 9 prac­tice areas are re­com­men­ded in the Cham­bers and Part­ners Europe Guide 2021. The fol­low­ing law­yers from our of­fices in Zurich and Geneva...
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CMS ad­vised the own­er of Ak­tiengesell­schaft Ernst Hablützel + Co. on the...
After many years of op­er­at­ing the fam­ily busi­ness in the fourth gen­er­a­tion, the own­er of Ak­tiengesell­schaft Ernst Hablützel + Co., has de­cided to ar­range his suc­ces­sion in time and thus se­cure the long-term...
Life Sci­ences & Health­care Prac­tice Group Switzer­land
Your spe­cial­ists in the field of Life Sci­ences & Health­care Our Life Sci­ences & Health­care team con­sists of spe­cial­ised at­tor­neys who will ad­vise and rep­res­ent you in all leg­al mat­ters com­pet­ently and...
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New rank­ings from "The Leg­al 500" for CMS Switzer­land
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Top-Rank­ings for CMS Switzer­land by Cham­bers and Part­ners
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