Dover Corporation is an American conglomerate manufacturer of industrial products.[6] Founded in 1955 in New York City,[1] Dover is now based in Downers Grove, Illinois,[6] and employs more than 26,000 people worldwide.[1] Dover's business is divided into three segments; Engineered Systems, Fluids, and Refrigeration & Food Equipment.[6] Each segment holds operating companies that are run like independent companies. Dover is a constituent of the S&P 500 index[7] and trades on the New York Stock Exchange under "DOV". Dover is ranked 360th on the Fortune 500.[5] The company relocated its headquarters to Illinois from New York in mid-2010.