Klaus Rüdiger Trützschler

RAG Deutsche Steinkohle AG engages in the operation and management of mining facilities. It also focuses on facilities for processing, refining, and conversion of mining products. The company was founded in 1998 and is headquartered in Essen, Germany.

Wuppermann AG manufactures rolled steel sheets, tubes and other steel products. It produces products such as flat rolled steel, tubes, profiles, sheet metal parts, and integrated components made of steel, stainless steel and aluminum. The firm serves engineering, construction, furniture, medical equipment, food, and packaging industries. The company was founded by Theodor Wuppermann in 1872 and is headquartered in Leverkusen, Germany.

Zwiesel Kristallglas AG manufactures and distributes drinking glasses. Its brands include SCHOTT ZWIESEL, ZWIESEL 1872 and JENAER GLAS. The company was founded by Anton Müller in 1872 and is headquartered in Zwiesel, Germany.

Franz Haniel & Cie. GmbH is a Haniel family equity firm. The company was founded in 1756 by Jan Willem Noot and is headquartered in Duisburg, Germany.

Wilh. Werhahn KG operates as a holding company, which operates in the Building Materials, Consumer Goods, and Financial Services divisions. The Building Materials division offers products for road construction, roofs, and façades. The Consumer Goods division focuses on kitchen and body care items. The Financial Services division includes leasing, factoring, and vehicle financing. The company was founded by Peter Wilhelm Werhahn in 1841 and is headquartered in Neuss, Germany.

RUETGERS Chemicals AG manufactures plastics, chemicals, and binding materials used in electronics and automobiles. It specializes in the manufacture of basic and specialty chemical products. The company manufactures industrial chemical products such as aromatics, petroleum products, organic intermediates, and pharmaceuticals. The company was founded in 1964 and is headquartered in Castrop-Rauxel, Germany.