GATX Corporation leases, operates, manages, and remarkets assets in the rail and marine markets. The company operates in three segments: Rail, American Steamship Company (ASC), and Portfolio Management. The Rail segment leases tank cars, freight cars, and locomotives to customers operating in chemical, petroleum, food/agriculture, and transportation industries in North America and Europe. As of December 31, 2011, it owned a worldwide fleet of approximately 130,000 railcars. This segment also had an ownership interest in approximately 32,000 railcars through affiliates, as well as managed approximately 2,000 railcars for third-party owners. The ASC segment owns and operates a fleet of U.S. flagged vessels on the Great Lakes, providing waterborne transportation of dry bulk commodities, such as iron ore, coal, limestone aggregates, and metallurgical limestone for customers in the steel, electric utility, and construction industries. As of December 31, 2011, this segment’s fleet consisted of 17 vessels, including 14 diesel powered and 3 steam powered vessels. The Portfolio Management segment provides leasing, asset remarketing, and asset management services to the marine and industrial equipment markets. This segment invests primarily in operating and finance lease assets and secured loans. GATX Corporation was founded in 1898 and is headquartered in Chicago, Illinois.