GATX Corporation operates as railcar leasing company in the United States and internationally.

The company operates through three segments: Rail North America, Rail International, and Portfolio Management.

It leases tank and freight railcars, and locomotives for petroleum, chemical, food/agriculture, and transportation industries.

The company also offers services, including the interior cleaning of railcars, routine maintenance and repair of car body and safety appliances, regulatory compliance works, wheelset replacements, interior blast and lining operations, exterior blast and painting, and car stenciling.

In addition, it leases aircraft spare engines, directly-owned aircraft spare engines, and five liquefied gas-carrying vessels, as well as manages portfolios of assets for third parties.

The company owns a fleet of approximately 147,000 railcars; 539 four-axle and 29 six-axle locomotives; and 5 vessels.

GATX Corporation was founded in 1898 and is headquartered in Chicago, Illinois.