FRANKFURT—German pharmaceutical company Merck KGaA is paying $17 billion to acquire Sigma-Aldrich Corp., a U.S. supplier of laboratory testing materials, as Merck looks to reduce its reliance on ...

FRANKFURT (Reuters) - Drugs and chemicals maker Merck KGaA agreed on Monday to acquire U.S.-based Sigma-Aldrich Corp for $17 billion in cash to boost its lab supplies business, the biggest ...