The acquisition of Sigma-Aldrich Corp. (St. Louis) by Merck KGaA (Darmstadt, Germany) has received U.S. antitrust clearance, which satisfies another condition to closing the transaction.
Sigma-Aldrich shareholders already approved the acquisition at a special meeting held in St. Louis on Dec. 5, 2014. Both companies continue to expect the transaction will close in mid-2015.