Complex sentence: Stewart J. Rahr was the owner of pharmaceutical and generics wholesaler Kinray, the largest privately owned pharmaceutical distributor in the world until it was bought out by Cardinal Health in 2010.
Split into simpler sentences: Stewart J. Rahr was the owner of pharmaceutical and generics wholesaler Kinray, which was the largest privately owned pharmaceutical distributor in the world. Kinray was bought out by Cardinal Health in 2010.