Rudolf A. Rentsch

Thomas Müller is a partner with the Banking & Finance practice in Zurich and advises banks, asset managers, fund managers, insurance companies and FinTech companies in complex regulatory matters and represents market participants before the Swiss regulatory authorities and as recognised representative before the SIX Swiss Exchange. He has been advising and managed a large number of e-money and payment services, cryptocurrency and blockchain projects. In finance, he focuses on corpora...

Thomas P. Müller is a partner with Walder Wyss. He advises Swiss and international corporate and public sector clients in all aspects of real estate and infrastructure law (project development, realisation, commercial leases, real estate transactions, financing), in the health care sector as well as in respect to the cooperation of the private and the public sectors (Public Private Partnership, public procurement, privatisations). Thomas P. Müller is a lecturer in the Master program...

Kinga M. Weiss is a partner and co-chair of the Private Clients team of Walder Wyss. She primarily devotes her time to domestic and foreign private clients, banks and family offices. Her areas of expertise are centered around both private clients and entrepreneurs in matters of inheritance law, including marital property law, relating to estate planning, business succession and execution of wills. Cross-border cases account for the bulk of her field of action. Besides, she also supports clien...

Oliver M. Kunz is a partner at Walder Wyss and is specialized in litigation in civil and criminal matters. He provides advice to parties in domestic and international commercial disputes, and represents them in trial and appellate proceedings as well as in enforcement proceedings and in international legal assistance matters. Oliver’s litigation practice covers a broad range of sectors, with a particular emphasis on the financial industry and technology-intensive sectors. In addition, h...

Fabienne Limacher is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Fabienne, who practices law in Zürich, Switzerland, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Fabienne is held by other top lawyers in the same geographic and legal practice area.

Ivo Hungerbühler is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust/Competition Law and Insolvency and Reorganization Law. Ivo, who practices law in Zürich, Switzerland, has been recognized since 2011. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ivo is held by other top lawyers in the same geographic and legal practice area.

Michael Cartier represents parties in international arbitrations under all major institutional rules and in ad-hoc proceedings, before state courts and in enforcement and legal assistance matters. He is listed as an expert for arbitration in Who's Who Legal 2016, 2017, 2018, 2019, 2020 and 2021. He also acts as arbitrator and is listed on the panel of arbitrators of the ICC National Committee (Switzerland) and of the Korean Commercial Arbitration Board. The focus of his work is on constructio...

Irène Suter-Sieber is a top attorney recognized by Best Lawyers in the practice area(s) of Labor and Employment Law. Irène, who practices law in Zürich, Switzerland, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Irène is held by other top lawyers in the same geographic and legal practice area.

Partner 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 ...

Micha Bühler is a top attorney recognized by Best Lawyers in the practice area(s) of International Arbitration and Litigation. Micha, who practices law in Zürich, Switzerland, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Micha is held by other top lawyers in the same geographic and legal practice area.