BASF has successfully completed its acquisition of Ciba Holding AG, which closed April 9, 2009 with the payment of the offer price to Ciba shareholders. At the same time, the tendered shares were transferred to BASF. The company now holds 95.8 percent of Ciba. Ciba shares that were not tendered as part of the public offer can be traded on the SIX Swiss Exchange until further notice.      As of closing, BASF Board member Dr. Hans-Ulrich Engel has become chairman of Ciba’s board of directors, th...