He specializes in mergers and acquisitions, including public takeover offers and private equity transactions, as well as capital markets work. His practice further focuses on advising (re-)insurance companies in M&A and capital markets transactions and with respect to license and regulatory matters and compliance with corporate governance and insurance regulations.

He is an Authorized Issuers‘ Representative at the SIX Swiss Exchange.Hansjürg Appenzeller has published a doctoral thesis on shareholders‘ agreements in international private law (Stimmbindungsabsprachen in Kapitalgesellschaften – Rechtsvergleichung und Internationales Privatrecht, Schulthess 1996). He has also published the insurance regulatory part of the Basel Commentary on the Swiss Merger Act as well as articles on the merger of insurance companies, hybrid instruments within the insurance regulatory framework, ad hoc publicity, the legal framework for activist shareholders in Switzerland and corporate law aspects of shareholders‘ meetings transmitted over the internet.