MBB SE, together with its subsidiaries, engages in the acquisition and management of medium-sized companies in Germany and internationally. It operates through four segments: Friedrich Vorwerk, Aumann, DTS, and Delignit. The company plans, builds, and operates systems for the transport and distribution of energy, including gas, electricity, hydrogen, and district-heating networks and facilities; offers winding technologies for electric motors, solutions for battery module and battery pack assembly, coating systems for electrode production, and systems for fuel cell production; and provides cyber security, data center, and cloud services, as well as managed services.