Per-Gunnar Leversen

Omya Oy produces industrial minerals and distributes specialty chemicals. It offers calcium carbonate fillers and coating pigments, chemical raw materials, intermediates, and specialty products. Its product solutions are used in the construction, printing, technical polymers, packaging, food, personal and home care, pharmaceuticals, agriculture, forestry, water, and energy industry. The company was founded on December 30, 1915 and is headquartered in Helsinki, Finland.

Omya A/S manufactures and sells chalk products. It serves paper, plastic, and paint industries. The company was founded on May 31, 1998 and is headquartered in Store Heddinge, Denmark.

Omya AG engages in the production and distribution of industrial minerals and specialty chemicals. It offers calcium carbonate fillers, coating pigments, and chemical raw materials. The firm serves the printing, writing, construction, technical polymer, applications, packaging, consumer goods, agriculture, forestry, water, and energy sectors. The company was founded by Gottfried Plüss-Staufer in 1884 and is headquartered in Oftringen, Switzerland.

Norsk Mineral AS provides financial investment services, mineral extraction and processing, industrial development and property solutions. It produces liquid marble, lime-based fillers and pigments for the paper industry. The firm also develops a hydro power plant; builds a gas fuelled power station; maintains a portfolio of stocks, shares and participates in venture companies. The company was founded by Stein Sturla Steinsvik in 2004 and is headquartered in Molde, Norway.

The Quartz Corp. SAS engineers rocks for a better world by providing ultra-pure raw materials to support the creation of renewable energy and innovative technologies. The private company is based in Paris, France. The Norwegian production site is located in the heart of fjord country in the village of Drag, known for its dramatic landscape where mountains meet sea. The French company mines and processes high purity quartz, which is one of the purest on earth. and has subsidiaries in Norway. The company's high purity quartz sand is essential for the lighting market, and the glass used in halogen lamps must have excellent optical transmission properties. The company is health and safety centric.