John Ottestad

Herøya Industripark AS owns industrial parks. The firm manages and operates real estate. It also invests in securities and other assets. The company was founded in 1928 and is headquartered in Porsgrunn, Norway.

Grenland Industriutvikling AS provides business administrative services. The company was founded on August 25 1988 and is headquartered in Porsgrunn, Norway.

ExThera AB commercializes medical products. manufactures medical products in both in vitro and in vivo studies. Its products include Ekoral-S the biocompatible mouth-rinse, ExT-M for treatment of oral mucositis, meeting unmet medical needs, and pipeline of additional new products. The company was founded by Karl Olov Peter Larm in 2003 and is headquartered in Stockholm, Sweden.

Sapa A/S develops, manufactures, and markets value-added profiles, profile-based building systems, and tubing solutions for automotive and heating, ventilation, air conditioning, and refrigeration applications in lightweight aluminum. It offers anodizing, casting, extrusion and extrusion dies, forming, friction stir welding, surface treatment, fabrication, and billet quality assessment. The company was founded in 2000 and is headquartered in Oslo, Norway.

Part of Yara International ASA, Herøya Nett AS is a Norwegian company that owns and operates an electricity distribution grid. The company is based in Porsgrunn, Norway. The company was founded in 2012. The CEO is Øyvind Nyhus.