Adva Optical Networking is a holding company. Through its subsidiaries, Co. is engaged in the development, production and marketing of optical and Ethernet-based networking solutions to telecommunications carriers and enterprises to deliver data, storage, voice and video services. Co.'s optical transmission solutions are based on Wavelength Division Multiplexing (WDM) technology. With WDM, multiple data streams are transmitted over a single optical fiber by assigning each stream to a different wavelength. Co. also provides Ethernet-optimized transmission solutions for fiber-based networks used to interconnect enterprises and mobile network base stations with carrier networks.

Aixtron is a provider of deposition equipment to the semiconductor industry. Co.'s technology solutions are used by customers to build components for electronic and opto-electronic applications based on compound, silicon, or organic semiconductor materials. The components are used in displays, signaling, lighting, fiber optic communication systems, wireless and mobile telephony applications, optical and electronic storage devices, computing, as well and other technologies. Co. supplies to customers both full production-scale chemical vapor deposition systems and small scale systems for research and development use.

Nemetschek is a holding company. Through its subsidiaries, Co. is a software provider for the architecture, engineering, construction, and management industry. Co.'s business activities comprises of 12 brands, which provide solutions for architects, structural designers, and civil and specialist engineers as well as software for cost and schedule planning, tenders, awarding of contracts, invoicing, and execution of building work. There are also solutions for technical facility management and commercial property management as well as for architecture, film, animation and advertising visualization software. Co. organizes its operations into four segments: Design, Build, Manage and Multimedia.