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Dr Stephan Werlen
Partner

Dr Stephan Werlen, LL.M.

Languages
  • German
  • English
  • French
Social media

Stephan Werlen focuses on M&A and corporate law, joint ventures, management buy-outs, acquisition finance and venture capital transactions. He has broad experience both in domestic and international mergers and acquisitions (including auction processes), the structuring as well as the financing of such transactions. In addition, he is an expert in W&I insurance transactions (M&A insurance) with a long track record in this area. Stephan Werlen also regularly advises foreign companies on their relocation to Switzerland and assists companies in a broad variety of corporate matters (e.g. shareholders' agreements, cash pooling agreements, employee stock option plans, capital measures and other corporate housekeeping matters, advising boards of directors etc.).

Stephan Werlen joined CMS in 2003 and became a partner in 2009. He is a member of the CMS Corporate Practice Group and the CMS Private Equity Sector Group.

Stephan Werlen studied law at the University of Zurich (lic. iur., Dr. iur) and earned a post-graduate degree from University of Chicago Law School (LL.M.). Before joining us, he worked at the District Court of Zurich and wrote his thesis on the legal position of the target company in a public tender offer (Die Rechtsstellung der Zielgesellschaft im Übernahmekampf, Schweizer Schriften zum Bankrecht, Bd. 64, Zürich 2001).

Stephan Werlen is an officially admitted representative of listed companies at the SIX Swiss Exchange.

Awards & Recognitions
01
  • Quote
    "Very efficient, very calm, clear and structured. Great to work with."
    IFLR 1000, client feedback, 33rd edition (2023/2024)
  • Quote
    "Very hands-on, always reachable and can explain complex topics to clients in simple worlds."
    The Legal 500, Switzerland, Commercial, Corporate / M&A, 2021

Relevant experience

  • Advised the owner family on the sale of a majority stake in Schurter Group to Capvis
  • Advised Axpo on the sale of its 12.69 % stake in Repower AG to the Canton of Graubünden, Elektrizitätswerke des Kantons Zürich (EKZ) and UBS Clean Energy Infrastructure Switzerland.
  • Advised Baillie Gifford & Co on its investment in Climeworks.
  • Advised shareholders on sale of Haselmeier Group to Sulzer.
  • Advised shareholders on sale of keyon AG to Swiss IT Security AG.
  • Advised Avectris on acquisition of Logicare AG.
  • Advised Halder on acquisition of Sirag AG, Univer AG and Uniprod AG.
  • Advised IMCD on acquisition of DCS Pharma Group.
  • Advised Yongfeng on an investment in Sotefin SA and on the establishment of a joint venture in China.
  • Advised Halder on acquisition of Suvema AG.
  • Advised Halder on acquisition of Specken Drumag Group.
  • Advised Avectris on acquisition of ERPsourcing AG.
  • Advised Dharampal Satyapal Limited on acquisition of a substantial minority stake in Lalique Group.
  • Advised shareholders on sale of Alpha Solutions AG to Bechtle.
  • Advised shareholders on sale of fluidFOCUS AG to Rivella.
  • Advised Avectris on acquisition of Comicro AG.
  • Advised Optimapharm Group on acquisition of Denothex AG.
  • Advised shareholders on sale of Orbium to Accenture.
  • Advised Foncia Group on acquisition of GRIBI Group.
  • Advised on sale of evitria AG to private equity funds of Afinum and SHS.
  • Advised Roto Frank AG on acquisition of Dachfenster Keller GmbH.
  • Advised CCC Group in the acquisition of the majority stake in Karl Vögele AG, Uznach.
  • Advised shareholders on sale of R. Wick Group to JAG Jakob AG.
  • Advised Capcellence Mittelstandspartner GmbH on acquisition of a stake in Argo-Hytos Group.
  • Advised Axpo on the sale of its shares in Elektrizitätswerk des Kantons Schaffhausen AG to the Canton of Schaffhausen.
  • Advised shareholders on the sale of Infinigate Holding AG to H.I.G. Capital.
  • Advised Endeit Capital on its equity investment into Chronext AG (financing round).
  • Advised shareholders on sale of SF-Filter AG to Ambienta SGR.
  • Advised Festo on acquisition of Eichenberger Group.
  • Advised Blue Corporate Finance on cooperation with Quarton Partners.
  • Advised group of investors on investment in fabfab GmbH.
  • Advised ads-tec on cooperation with Leclanché SA.
  • Advised management on MBO of SMA und Partner AG.
  • Advised Matthews on acquisition of Wetzel group of companies.
  • Advised Polaris on acquisition of swissauto companies.

Publications

Memberships & Roles

  • Zurich Bar Association
  • Swiss Bar Association 
  • Swiss Private Equity & Corporate Finance Association (SECA)
  • University of Chicago Alumni Association
  • University of Zurich Alumni Association

Awards & Rankings

  • Best Lawyers | Mergers & Acquisitions, Switzerland, 2026
  • Leaders League | Mergers & Acquisitions, Switzerland, 2026 | Highly recommended
  • IFLR 1000 | M&A, Switzerland, 2025 | Notable practitioner

Lectures list

  • Impact HUB Geneva, participating as speaker on the panel at the SECA Lunch Event for R&W Insurance, 6 November 2017
  • Presentation on the topic: «Grant, vest, exercise: Rechtliche und steuerrechtliche Fallstricke beim Einsatz von Mitarbeiterbeteiligungen», Technopark, Startup Campus, Legal Tuesday, 14 March 2017
  • Lecture at SECA Breakfast Event "Gewährleistungen in M&A-Transaktionen: Möglichkeiten, Grenzen und Nutzen der Versicherung von Gewährleistungen und Freistellungen in M&A-Transaktionen", 6 April 2016

Education

  • 2003 – Master of Laws, LL.M., University of Chicago Law School (USA)
  • 2001 – Thesis, Dr.iur., magna cum laude, University of Zurich
  • 2000 – Bar exam
  • 1997 – legal studies, lic.iur., magna cum laude, University of Zurich
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