ACTHEOS was founded in 2007 with the merger of several recognized and historical accounting and auditing firms in Paris and w ... estern France. Currently with over 120 employees and 16 partners, ACTHEOS represents a competitive, alternative and complementary offer to the major accounting and audit networks in an approach combining proximity and multidisciplinarity. In an ever-changing economic environment, we have chosen to pool our skills and expertise to meet the new needs of our customers both in France and abroad. ACTHEOS is a member of the 3rd international alliance TAG Alliances, and the ATH technical association. read more