Home / People / Dr Patrick Sommer

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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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 Re­view in its latest edi­tion of GCR 100 2018.


Show only
11 September 2020
CMS ad­vised the own­er of Ak­tiengesell­schaft Ernst Hablützel + Co. on the...
A team of CMS led by Dr Patrick Som­mer ad­vised the own­er of Ak­tiengesell­schaft Ernst Hablützel + Co. on all leg­al mat­ters of the trans­ac­tion.
27 March 2020
CMS Ex­pert Guide to com­pet­i­tion law dur­ing coronavir­us crisis
28 August 2020
Life Sci­ences & Health­care Prac­tice Group Switzer­land
Our Life Sci­ences & Health­care team con­sists of spe­cial­ised at­tor­neys who will ad­vise and rep­res­ent you in all leg­al mat­ters com­pet­ently tailored to your needs.
15 April 2020
New rank­ings from "The Leg­al 500" for CMS Switzer­land
12 March 2020
Top-Rank­ings for CMS Switzer­land by Cham­bers and Part­ners
Wir freuen uns mit­teilen zu können, dass 14 un­ser­er An­wäl­tinnen und An­wälte in 10 Rechts­ge­bi­eten in der im März 2020 ver­öf­fent­licht­en Aus­gabe von Cham­bers and Part­ners Europe em­pfohlen wer­den.
06 January 2020
CMS ad­vised Conzz­eta on the sale of Schmid Rhyner Group
Swiss lis­ted Conzz­eta AG and the Ger­man spe­cialty chem­ic­als group ALTANA have agreed that ALTANA ac­quires the Schmid Rhyner Group from Conzz­eta. A team from CMS Switzer­land, led by Patrick Som­mer, ad­vised Conzz­eta on all leg­al mat­ters of the trans­ac­tion.
16 April 2019
CMS Switzer­land fur­ther im­proves its rank­ing with The Leg­al 500
We are de­lighted to an­nounce that 12 prac­tice areas of CMS Switzer­land have been re­com­men­ded in this year's edi­tion of Leg­al500, pub­lished in April 2019.
07 March 2019
Top rank­ings for CMS Switzer­land by Cham­bers and Part­ners
CMS Switzer­land is de­lighted to an­nounce that 14 law­yers across 10 prac­tice areas have been re­com­men­ded in the 2019 edi­tion of Cham­bers & Part­ners Europe, pub­lished in March 2019.
21 August 2018
Your in­tro­duc­tion to CMS Switzer­land
CMS von Er­lach Pon­cet is the res­ult of the 2014 mer­ger of CMS von Er­lach Hen­rici and ZPG Avocats, which brought to­geth­er two prom­in­ent ..
CMS ad­vises Plan­zer Group on the ac­quis­i­tion of the Leim­gruber Group
Leim­gruber, a fa­miliy-led lo­gist­ic and trans­port group like Plan­zer, em­ploys at four loc­a­tions around 300 em­ploy­ees and op­er­ates 100 chartered vehicles. Leim­bruber
20 April 2018
CMS ad­vises Conzz­eta Group on the ac­quis­i­tion of ISAtec GmbH
ISAtec GmbH, dom­i­ciled in Wohlenschwil (Switzer­land), has vast ex­per­i­ence in the de­vel­op­ment and pro­duc­tion of sil­ver and gold coat­ings. ISAtec GmbH has so far sup­plied Schmid Rhyner AG with the metal­lic coat­ings of the WESSCO..
13 February 2018
Our Swiss Com­pet­i­tion Team – Highly re­com­men­ded in the 18th edi­tion of...
CMS von Er­lach Pon­cet: Our Swiss Com­pet­i­tion Team – Highly re­com­men­ded in the 18th edi­tion of GCR 100. Read more here.