GATX Corporation, together with its subsidiaries, is a railcar leasing company operating in the United States, Canada, Mexico, Europe, and India. It operates through three segments: Rail North America, Rail International, and Engine Leasing. The company leases tank and freight railcars and locomotives to the petroleum, chemical, food/agriculture, and transportation industries, and also provides maintenance services such as interior cleaning, routine repair of car bodies and safety appliances, regulatory compliance work, wheelset replacements, interior blast and lining, exterior blast and painting, and car stenciling. In addition, it manufactures commercial aircraft jet engines, leases aircraft spare engines, and owns and manages tank containers leased to the chemical, industrial gas, energy, food, cryogenic, and pharmaceutical industries, as well as to transport and logistics and tank container operators, while also offering tank container leasing, remarketing, and inspection and maintenance services. As of December 31, 2025, it owned and operated a fleet of approximately 156,000 railcars, 567 four-axle and 60 six-axle locomotives, 456 aircraft spare engines, and 25,602 tank containers. GATX Corporation was founded in 1898 and is headquartered in Chicago, Illinois.