Sotheby's is the world's fourth oldest auction house in continuous operation, with 90 locations in 40 countries. Sotheby's is the world's fourth oldest auction house in continuous operation, with 90 locations in 40 countries.
Of course, a more complex version of the sentence is " Sotheby's is the world's fourth oldest auction house in continuous operation, and the world's largest art business with global sales in 2011 totaling $ 5.8 billion. "