Henry M. Holterman

Koninklijke Volker Wessels Stevin NV provides construction and civil engineering services. It operates business through the following markets: building and property development, energy and telecom, and infrastructure. It offers housing and utility construction, industrial construction, property development, civil engineering, network infrastructure, telecommunications infrastructure, railway construction and maintenance, technical installations, traffic technology, plant and machinery management, park management, building supplies and consulting services. The company was founded in 1854 and is headquartered in Amersfoort, Netherlands.

Reggeborgh Beheer BV is a private equity family office of the Wessels Family founded in 1991. The firm is headquartered in Rijssen, the Netherlands.

Reggeborgh Invest BV is a family office founded in 1991 by the Wessels family. The Dutch company has grown into an international holding with subsidiaries in Germany, Belgium, and the Netherlands.

Argos Groep BV Wholesales and distributes petroleum products. It offers fossil fuels, such as petrol, diesel, natural gas, and fuel oils; petrol with bio-ethanol, bio-ethanol with petrol and diesel with rapeseed oil; and metalworking and machining fluids, hydraulic fluids, engine and transmission oils, and automotive lubricants, as well as industrial lubricants, coolants, and greases. The company founded by Peter Jacob Goedvolk in 1984 and is headquartered in Rotterdam, the Netherlands.

Volkerwessels Bouw & Vastgoedontwikkeling BV provides building and property development services. It offers services such as housing and utility construction, industrial construction, property development, civil engineering, road construction and network infrastructure (cable and pipelines). The company was founded in 1990 and is headquartered in Rijssen, the Netherlands.

North Sea Group is a key player on the Western European downstream oil market. The company combines storage and distribution with the international trading and sale of mineral oils and biofuels. The customers, including major oil companies, the international shipping industry, trading houses and resellers, have relied on the product quality and market-oriented approach of North Sea Group for decades. By expanding into Asia and South America, the European company is further broadening its position on the increasingly global oil market, paying careful attention to issues of safety, sustainability and the environment. The Group's commercial divisions trade in all mainstream mineral oil products such as heavy fuel oil, automotive diesel, heating oil, marine diesel, kerosene and mogas. Over the past few years biofuels have become a key new product group for North Sea Group. North Sea Group was founded in January 2009 to coordinate the merger between all divisions.

Varo Energy BV engages in the refining, storing, sale, and supply of oil and fuel products. It offers liquid petroleum, gasoline, biofuels, ultra low sulphur diesel, heating oil, aviation fuels, bitumen, and bunker fuel oil. The company is headquartered in Rotterdam, the Netherlands.