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Stefan Brunnschweiler

Work +41 44 285 11 11

Work Department

Corporate / M&A, Competition & EU


Stefan Brunnschweiler is the global head of the CMS Corporate/M&A Practice Area Group.

He specialises in international and domestic M&A transactions, corporate restructurings, corporate law and general contract matters (e.g. joint ventures, partnerships and shareholders' agreements). He is experienced in a broad range of national and international transactions, both sell- and buy-side (including corporate auction processes) as well as the assistance of clients in their ongoing corporate and commercial activities.

Stefan Brunnschweiler has engaged in competition law, including merger control filings for more than 10 years.


Stefan Brunnschweiler graduated from the University of Zurich in 1997. In 2000, after serving as a law clerk at the district court of Winterthur, he was admitted to the bar. He joined CMS von Erlach Poncet in 2001. Stefan Brunnschweiler completed a masters program (Master of Laws, LL.M.) at the University of San Diego School of Law and worked as a foreign associate with Higgs, Fletcher & Mack in San Diego (USA) before returning to CMS von Erlach Poncet by the end of 2003. He is a partner with CMS von Erlach Poncet since 2008 and became global Head of CMS Corporate/M&A in 2015.


German, English, French, Italian.


  • Zurich Bar Association
  • Swiss Bar Association
  • Studienvereinigung Kartellrecht
  • Swiss Private Equity & Corporate Finance Association


  • 2003 – University of San Diego (USA), Master of Law (LL.M.)
  • 2000 – Bar Admission (Zurich, Switzerland)
  • 1997 – University of Zurich and Geneva (Switzerland)


"Outdoor sports with my friends and time with my family freshens up my mind and is a source of new ideas."


Commercial, corporate and M&A

Within: Commercial, corporate and M&A

'Well-integrated law firm' CMS has 'a one-stop-shop attitude and uses straight-forward communication' while maintaining 'excellent legal quality and response times'. The team is best known for advising on cross-border transactions, frequently at mid-market level and in relation to private equity funds, while also focusing on directors' liability issues, W&I insurance matters and legal assistance to start-ups. 'Deeply knowledgeable' Stefan Brunnschweiler advised CCC Group on the €10m acquisition of a 70 per cent stake in fashion company Karl Vögele, while Pascal Favre advised France-based Michelin on the purchase of a minority interest in A.T.U. Auto-Teile-Unger.

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Leading firms: German-speaking Switzerland

Within: Leading firms: German-speaking Switzerland

International firm CMS has a strong reputation for competition law, dispute resolution, healthcare and life sciences, as well as insurance sector, employment law and real estate matters. Prominent practitioners include Stefan Gerster, Stefan Brunnschweiler, David Hürlimann, Marquard Christen, Clemens von Zedtwitz, Christian Gersbach, Jodok Wicki and Philipp Dickenmann.

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Legal Developments by:

  • Access to justice: protective costs orders in planning challenges

    Third parties and competing developers have no rights of appeal to the Secretary of State against planning decisions. Disappointed applicants can appeal to the Secretary of State and can have the merits of the application reconsidered. The only remedy available to a disappointed third party is a challenge by way of judicial review in the High Court on a point of law. The sense of frustration and disempowerment this creates has not been helped by the increasing complexity of the planning process and the use of consultation to legitimise decisions that many perceive may already have been taken.
    - CMS Group

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