Complex sentence: After the 1998 merger with nuclear power company Brown, Boveri & Cie, ASEA became ABB. As a result, Västerås was home to its Swedish headquarters, and since the Westinghouse takeover of ABB's nuclear business it is owned by Westinghouse Electric.
Split into simpler sentences: After the 1998 merger with nuclear power company Brown, Boveri & Cie, ASEA became ABB. As a result, Västerås was home to its Swedish headquarters. Since the Westinghouse takeover of ABB's nuclear business it is owned by Westinghouse Electric.