Arne Bengt Gunnar Ljung

Reflex Instrument AB manufactures surveying instruments for drill holes. The company is based in Vallentuna, Sweden.

Swedish Mining & Tunnelling Group supplies equipment for mining and underground operations. The private company is based in Stockholm, Sweden.

Kalmar, Inc. is an American company that engages in tour operation. The CEO of the private company is Arne Bengt Gunnar Ljung.

Nitro Consult AB provides engineering and construction services. The company was founded in 1969 and is headquartered in Hägersten, Sweden.

Bergteamet Holding AB provides underground services to the local mining industry. It specializes in tunneling, raise boring, and shaft and mining works. The company was founded by Jan Olof R. Marklund on September 20, 2011 and is headquartered in Boliden, Sweden.^ ^

Svemin AB is an industry association based in Stockholm, Sweden that focuses on the mining industry. The Swedish company has developed a concept called "Mining with Nature" to increase biodiversity and profitability for businesses. All member companies must follow the roadmap. Svemin has also initiated a new traceability system called Tracemet to trace the origin of metals in consumer products. The purpose of Tracemet is to develop a simplified IT system for traceability. The CEO of the private company is Thomas Ljung.