Friedrich Carl Janssen

E.ON Ruhrgas AG distributes gas. It offers gas transmission and storage solutions. Through a long pipeline system, the company supplies natural gas to gas merchant companies, distributors and industrial users in Germany and seven other nations. It also has interests in gas companies in other countries. Its customers comprises of regional companies, local distribution companies, industry and power stations. The company was founded in 1926 and is headquartered in Essen, Germany.

National Bank AG provides commercial, investment, mortgage, and retail banking services. The firm offers a wide range of financing facilities including bank-to-bank facilities, export-project-financing, buyer's credits, guarantees, forfeiting and confirmations of Letters of Credit. The company was founded in 1921 and is headquartered in Essen, Germany.

Stadtwerke Göttingen AG is an energy service provider based in Göttingen, Germany, founded in 1859. The German company is responsible for providing gas, energy, heat, and water to Göttingen and the surrounding region. The private company also offers emergency services for gas leaks, water supply disruptions, and district heating interruptions. Additionally, the company assists with the renewal of heating systems. Stadtwerke Göttingen AG is ultimately controlled by the City of Göttingen.

Avacon AG operates as a regional energy service provider. Its services include energy and natural gas distribution, water supply, as well as district heating. The firm also offers technical and infrastructure services. The company was founded in 1999 and is headquartered in Helmstedt, Germany.

E.ON Hanse AG provides utility services by providing natural gas, electricity, water, and waste management services. It also offers energy supply plans and real estate development services to local governments. It was created by the merger of Schleswag (Rendsburg), Hein gas (Hamburg), and Hanse gas (Schwerin). The company is headquartered in Quickborn, Germany.

IQ EQ Luxembourg SA engages in the provision of compliance, administration, and asset services to alternative investment funds, international corporations, high-net-worth individuals (HNW) families, and entrepreneurs. The firm also provides fund, private client, and corporate solutions. The company was founded in 1953 and is headquartered in Luxembourg.

Part of HDI Haftpflichtverband der Deutschen Industrie VVaG, HDI-Gerling Sach Serviceholding AG provides life insurance. The private company is based in Hannover, Germany. The CEO of the German company is Christian Hinsch.