Jörg Kampmeyer

Gebr. Knauf KG operates as a holding company, which engages in the production of gypsum and gypsum-related products, insulation and soundproofing materials, as well as cardboards for the manufacture of plasterboards. It also specializes in the development and production of machines for the processing of plasters for indoor and outdoor use. The company was founded on December 6, 1972 and is headquartered in Iphofen, Germany.

KNAUF INTERNATIONAL GmbH is a holding company, with interests in the production and distribution of construction materials. It offers dry construction mixtures, gypsum plasterboard, and drywall. The company was founded in 1932 and is headquartered in Iphofen, Germany.

Hilti Martin Family Trust engages in the support of activities and projects in the educational, cultural and social sectors. The company was founded in 1980 and is headquartered in Schaan, Liechtenstein.

Hilti AG engages in the development, manufacture, and sale of construction tools and equipment. The company's product portfolio includes anchor systems, construction chemicals, cordless systems, direct fastening, drilling and demolition, firestop, diamond coring and cutting, modular support systems, measuring systems, screw fastening, façade systems, as well as accessories. It also provides system solutions, as well as software and services. The company was founded by Martin Hilti and Eugen Hilti in 1941 and is headquartered in Schaan, Liechtenstein.