Christian Fredrik Sontum

Robust AB acquires small and medium-sized engineering companies. Through its subsidiary, it manufactures and markets construction and industrial components. The firm also provides components for the manufacturing industry ranging from tool and storage cabinets to customized solutions for offices, mezzanines, and wall systems. The company was founded on December 13, 2012 and is headquartered in Nykroppa, Sweden.

Roadworks Holding AS invests and owns shares, financial instruments, and investments in other companies. The company was founded on November 15, 2012 and is headquartered in Oslo, Norway.

Aptilo Networks AB provides wireless service management solutions. The firm offers mobile data offloading, operator managed guest wi-fi and enterprise guest internet solutions, wireless calling, and Internet of things. The company was founded by Ulf Johan Stigberg, Paul Richard Mikkelsen, Jonar Lagerquist, Jan Sjönell, Torbjörn Wård and Per Knutsson in June 2001 and is headquartered in Stockholm, Sweden.

Norvestor Equity AS (Norvestor Equity) is a private equity firm founded in 1993. The firm is headquartered in Oslo, Norway.

Roadworks AS provides infrastructure services focusing on road, tunnel, and technical roads. It offers the following services: operation and maintenance of roads, signage and roadwork, lighting, monitoring and control systems, and road security. The company was founded in February 2015 is headquartered in Grimstad, Norway.

NetNordic Holding AS provides electronic and telecommunication parts and equipment. It specializes in delivering network, communication, security solutions and services. The company was founded in 2001 and is headquartered in Lysaker, Norway.

Robust UK Ltd. was founded in 1997 and manufactures and sells doors. The company is based in Stoke-on-Trent, UK.

Panorama AS produces, imports, exports, markets, and sells jewelry items. The company was founded on June 16, 1997 and is headquartered in Arendal, Norway.