Een overzicht van de bedrijven die de werking van GEOS mede mogelijk maken:

With over 250 production units worldwide Sibelco is an important company in terms of extraction, production and distribution of five major minerals for industrial use: quartz, cristobalite, nepheline, plastic clay and olivine.
Furthermore Sibelco treats a lot of other minerals for industrial applications like barite, bentonite, calcite, dolomite, hydromagnesite, kaolin, feldspar, wollastonite, talc, huntite, …
As pioneer in its core business, Sibelco looks back on more than 135 years of experience and a unique know-how.
Wienerberger AG is the world’s largest producer of bricks, and number one on the clay roof tile market in Europe with 230 plants in 30 countries. The company also holds leading positions in concrete pavers in Central-East Europe and pipe systems in Europe. It is based in Vienna, Austria. Founded in 1819, the company's shares have been listed on the Vienna Stock Exchange since 1869 and currently have a free float of 100%.
Jan De Nul
People and global expertise. These are the corner stones of Jan De Nul Group’s success. Thanks to its skilled employees and the world’s most modern fleet, Jan De Nul Group is a leading expert in dredging and marine construction activities, as well as in specialized services for the offshore industry of oil, gas and renewable energy. These core marine activities are further enhanced by Jan De Nul Group's in-house civil and environmental capabilities offering clients a complete package solution. Our professional and innovative solutions are trusted across the industry. Whether it concerns the construction of the new locks in the Panama Canal or a new port complex in Western Australia, together with our customers, we build for further economic development.
WILLEMEN GROEP is today Belgium's largest family-owned construction group. The Group's expansion has gathered momentum in the fourth generation of family ownership, with, among others, the acquisition of contractors Franki (1998), Cosimco (2005), Groep De Waal (2005) and road builders Aswebo (2011) and Aannemingen Van Wellen (2014).
In 2013 Willemen Groep received the prestigious "Entrepreneur of the Year" award for its dynamism and entrepreneurial spirit. This prize is a real incentive for all employees to continue grow the company, and serves to showcase the Group's values and ambitions.