The core activity of IMUB AG encompasses three main areas: 1. Industrial and commercial real estate: The company offers services in the field of industrial and commercial real estate, indicating the management, rental, and sale of properties in these sectors. 2. Management: IMUB AG provides management services, indicating the assumption of leadership and organizational tasks for clients. 3. Accounting and payroll administration: The company offers accounting and payroll administration services, indicating the management of finances, wages, and salaries for clients. Overall, the core activity of the company can be described as a combination of real estate management, management, and financial services.