ADB Altorfer Duss und Beilstein AG

ADB positions itself as a boutique for complex tax and legal questions rather than a full-service provider. Clients include mid-sized companies, holding structures, international groups with Swiss subsidiaries, and high-net-worth individuals. On the corporate tax side, the team handles filings, tax optimization, restructuring and M&A support.

For private clients, ADB advises on complex income and wealth situations, business succession, inheritance tax, and moving to or from Switzerland. The firm is based in Zurich and well connected in international tax law.