Dr iur David Oser > Homburger > Zurich, Switzerland > Lawyer Profile

David Oser photo

Work Department

Corporate | M&A.


Partner. Focus on public and private M&A, including redomestication transactions; corporate governance and general corporate matters. Recent representations: Schroders plc in its 70%-acquisition of BlueOrchard Ltd (2019), Smith & Nephew in its acquisition of Atracsys (2019), Transocean Ltd. in its acquisition of Ocean Rig (2018), WISeKey International Holding Ltd in its sale of QuoVadis PKI business to DigiCert (2018), Transocean Ltd. in its public tender offer for all shares of Songa Offshore SE (2017), ChemChina in its 43bn public tender offer for Syngenta (2016), Axel Springer and Ringier creating a new joint venture company (2015), SIX Group’s sale of its equity interest in STOXX to Deutsche Börse (2015), Holcim in its merger with Lafarge (2014).


Joined Homburger in 2003, Partner since 2009. Previously an associate at Sullivan & Cromwell, LLP (New York, 2000 – 2002).


German, English, French.


Swiss-American Chamber of Commerce, Legal Chapter.


University of Basel (lic iur 1995; Dr iur 2007). Columbia Law School (LLM 2000). Admitted to Swiss courts (1998) and New York bar (2001).

Lawyer Rankings

Switzerland > Commercial, corporate and M&A

Homburger has a track record handling headline transactions, where it is active for various corporations. The team is particularly knowledgeable in working for clients from regulated sectors. Besides advising on a variety of transactions, the team is also experienced in corporate governance matters and regulatory aspects. Dieter Gericke heads up the group and is an expert in public and private M&A. Daniel Daeniker has been active in this field for a long time and is noted alongside Frank GerhardClaude Lambert and David OserDaniel Hasler is another key contact.