 The two companies announced on 24 June 2011 that their joint €3.4 billion tender offer had been successful, with 94% of Tognum shareholders accepting.Once the acquisition was complete, Tognum is run as a 50-50 joint venture, with Rolls-Royce merging its Bergen Marine diesel engines unit into the operation.The acquisition of Tognum by the two companies was completed in September 2011 and the business continued to trade as Tognum AG until January 2014, when it was renamed Rolls-Royce Power Systems AG.