Aker ASA is a Norwegian industrial investment company with ownership interests concentrated in oil and gas, renewable energy and green technologies, industrial software, seafood and marine biotechnology sectors. The company is listed on Oslo Stock Exchange. Aker's main shareholder is Kjell Inge Røkke, who owns 68.2% per cent of Aker through his company TRG Holding AS. The corporate headquarters are located in Fornebu, Norway. Aker was established in 1841 when Akers Mekaniske Verksted was founded in Oslo.