Stanislaus Prinz zu Sayn-Wittgenstein

RHI AG engages in the manufacturing of refractory products, systems and services. Its products include solutions for the cement, enrviro-energy-chemistry, glass, lime, nonferrous metals, raw materials, and steel industry. The company brands include Monofrax, Didier, Veitscher, Radex, Interstop, and Dolomite Franchi. It operates through the following segments: Steel, Industrial and Raw Materials. The company was founded in 1998 and is headquartered in Vienna, Austria.

Westfalen Weser Energie GmbH & Co. KG builds and operates regional distribution networks for electricity, gas, and water. The company is based in Padeborn, Germany, and has subsidiaries in Germany. The German company is committed to district heating concepts. The CEO of the private company is Stephan Nahrath.

Energieservice Westfalen Weser GmbH supplies heat, electricity, and water. The company is based in Kirchlengern, Germany. The CEO of the German company is Stefan Freitag.

RHI Magnesita Deutschland AG engages in the manufacture of refractory materials. Its products are used in the iron and steel, cement and lime, glass and non-ferrous metals industries. The company was founded in 1834 and is headquartered in Wiesbaden, Germany.

Steinbach & Vollmann GmbH & Co. KG engages in the sale and distribution of locking solutions. Its products include rim locks, mortise locks, hinges, door holder, door closer, pressing lever handle, door hardware, house numbers, swing and machine handles, panel fasteners, mechanical and electronic safe locks, key blanks, safe fittings, mechanical and electronical custodial locks. The company was founded by Rudolf Steinbach and Eduard Vollmann in 1883 and is headquartered in Heiligenhaus, Germany.

Gmd Gesellschaft Fuer Medizinische Datenverarbeitung Mbh is a German medical data company. The private company is based in Cologne, Germany.