 In 2007, it was taken off the exchange to avoid a takeover by billionaire John Fredriksen’s Seadrill, which made a voluntary offer for all outstanding shares in Aker Drilling.Aker ASA, through its wholly owned subsidiary Aker Capital ASA, made a voluntary acquisition of a majority stake in Aker drilling, which subsequently led to the de-listing of the company in March 2008.In 2009, the company took ownership of the semi submersibles - Aker Barents and Aker Spitsbergen.