The company was founded in 1866 as the "Star Tank Line" by Captain Jacob J. Vandergrift (1827–1899),[6] in response to the economic activities of John D. Rockefeller in the years leading up to his creation of Standard Oil.[1] Vandergrift was involved in the conflicts in the oil regions of Western Pennsylvania in the 1860s–1870s.[7] Eventually, Union Tank Car Company and Vandergrift's other holdings, which included pipeline and riverboat transport companies, merged with the company that later became Standard Oil. Rockefeller, once Vandergrift's nemesis, made him Vice President of Standard Oil.[6][8] The town of Vandergrift, Pennsylvania, built in 1895 by steel company president George G. McMurtry to house his workers, was named in Vandergrift's honor.[7] Vandergrift is regarded as a leader of transforming the shipment of oil.[6]
The first generation of wooden tank cars were introduced to transport petroleum products in 1865, serving the oil fields of Pennsylvania. Four years later, the wooden tanks were replaced by cast iron ones.[9]
Union Tank changed its name to "Union Tank Car Company" in 1919.[2] During the Great Depression, the company acquired thousand of tank cars and began leasing them back to shippers, an activity that has continued to date.[9] During the 1920s, the company had a fleet of about 30,000 cars, and moved its operations to Chicago.[1]
In 1952, Union Tank established its Canadian subsidiary, Procor.[2]
The Union Tank's largest tank ever manufactured was the "Whale Belly", with a capacity for 50,000 gallons. It was introduced in 1963 and served for more 20 years.[9]
TransUnion was formed as a holding company in 1968 to hold Union Tank Car Company. TransUnion soon began acquiring credit information and information management companies as a second major investment. The Marmon Group acquired TransUnion in 1981, spinning off the TransUnion name and the financial portion of the holding company to Madison Dearborn Partners in the 1990s. Union Tank Car Company is still owned by Marmon, which in turn is now a 100% owned subsidiary of Berkshire Hathaway.