Kværner was a Norwegian engineering and construction services company that existed between 1853 and 2005. In 2004, it was amalgamated to the newly formed subsidiary of Aker ASA - Aker Kværner, which was renamed Aker Solutions on 3 April 2008. Kværner re-emerged on 6 May 2011, when the EPC (engineering, procurement and construction) part of Aker Solutions took the Kværner name. The new Kværner company was listed on the Oslo Stock Exchange on 8 July 2011. History Kvaerner Brug was founded in Oslo in 1853 by industrialist Oluf A. Onsum (1820-1899). The company became principally involved in the production of cast iron stoves. In 1870, Kvaerner built its first hydroelectric turbine. During the early 1900s, Kvaerner power turbines remained the principal product line which also included bridges, cranes, and pumps. Kvaerner was listed on the Oslo Stock Exchange in 1967. By the 1990s, the company assembled a collection of engineering and industrial businesses, including shipbuilding, construction of offshore oil and gas platforms, production of pulping and paper manufacturing equipment, and operation of shipping fleet. Directors-general of Kværner after the stock exchange listing were Kjell B. Langballe (1960–1976), Carl Røtjer (1976–1986) and Mikal H. Grønner (1986–1989). Chairmen were Frithjof A. Lind (–1982), Johan B. Holte (1982–1985), Emil Eriksrud (1985–1986), Carl Røtjer (1986–1989), Kaspar Kielland (1989-1996), and then Christian Bjelland (1996-2001). Since 2011, the CEO has been Jan Arve Haugan. Erik Tønseth became director-general of Kværner in 1989, and under his leadership the company underwent large-scale international expansion, acquiring the state-owned Govan Shipbuilders from British Shipbuilders. In 1992 Kværner acquired the Swedish company Götaverken. In 1996, Kværner acquired the UK conglomerate Trafalgar House, and moved its international headquarters from Oslo to London. In January 1996, Kvaerner purchased a stake in the Vyborg Shipyard () and renamed it Kverner-Vyborg Shipyard () which was the largest manufacturer of offshore installations in Russia. The company's expansive acquisitions brought economic hardship to the company. Kjell Almskog became CEO in 1998, and implemented various plans to streamline the company. This included the sale of the Cunard Line (a division of Trafalgar House) to Carnival Corporation, the sale of Kvaerner Govan to BAE Systems and the sale of Chemrec to Babcock Borsig. On 10 March 2000, Kvaerner sold the Vyborg Shipyard, which was losing money and faced closure during 1999, to the Sergey Zavyalov () associated early 1990s established Ako Barss Group () which sold the shipyard to