The core activity of the company 'Caspar Derungs Treuhand und Revision' is the provision of services in the field of trust and revision, particularly for the public sector. This includes, among other things: trust services, such as managing general ledgers and preparing financial reports; audit services, such as examining annual financial statements and conducting audits; consulting and support in matters of finance and accounting; and specialized services, such as preparing tax returns and representing clients in tax matters. The company offers these services primarily to customers from the public sector, such as municipalities, foundations, and social insurance institutions.