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CMS advises owners on the sale of majority participation in Ardentis to Medbase

20 Aug 2026 Switzerland 2 min read

The Ardentis Group is a leading dental and orthodontic group in French-speaking Switzerland. It operates 20 modern practices in urban locations as well as its own dental laboratory and employs around 450 staff, including over 100 dentists.

Medbase Group is one of Switzerland’s leading providers of integrated healthcare services. With around 190 medical centres, psychotherapy practices, pharmacies and dental centres, as well as over 4,400 healthcare professionals, Medbase is continuously expanding its range of services across the healthcare sector.

By acquiring a majority stake in Ardentis from Columna Capital, Dr Mark Bischof, Dr Rabah Nedir and other minority shareholders, Medbase is strengthening its dental services in French-speaking Switzerland and taking another important step in its strategy to expand healthcare services relevant to patient care throughout Switzerland. Dr Mark Bischof and other senior executives from the company will remain as minority shareholders. The Ardentis Group will continue to be managed by the existing executive board.

A team led by partner Alain Raemy (Corporate / M&A) provided comprehensive advice to the sellers and the reinvesting shareholders on all legal aspects of the transaction. The team comprised Anna Mast (Senior Associate, Corporate / M&A Zurich), Samuel Gang (Senior Associate, Corporate / M&A, Zurich), Maximilian Hauser (Associate, Corporate / M&A, Zurich), Audrey Durand (Partner, Corporate / M&A, Geneva), Tania Luminuku (Senior Associate, Corporate / M&A, Geneva), Ambroise Baumgartner (Associate, Corporate / M&A, Geneva), Mark Cagienard (Partner, Tax, Zurich), Julien Witzig (Partner, Tax, Geneva), Alexandre Conus (Counsel, Tax, Geneva), Kaspar Landolt (Partner, Banking and Finance, Zurich) and Dominique Gemperli (Counsel, Banking and Finance, Zurich).

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