Kansas City Southern (KCS) was a transportation holding company with railroad investments in the United States, Mexico, and Panama and operated from 1887 to 2023.

[5] Its primary international holding was Kansas City Southern de México (KCSM), which operated about 3,315 route miles (5,335 km)[2] in 15 states in northeastern, central, southeast-central and southwest-central Mexico.

The 47.6-mile (76.6 km) railroad served as an intermodal line for world commerce and complemented the Canal, the Colón Free Trade Zone, and the Pacific and Atlantic ports.

CP then sought a merger, which was approved by the US Surface Transportation Board on March 15, 2023, and the combined "Canadian Pacific Kansas City Limited" was created on April 14, 2023.

The combined company forms the only railroad serving all of the countries in the North American trade zone (Canada, Mexico, and the United States).

Over the ensuing decade, the line grew through construction and acquisition of other roads, such as the Texarkana and Fort Smith Railway, to become a through route between Kansas City and Port Arthur, Texas.

With the final spike being driven north of Beaumont, Texas, on September 11, 1897, the Kansas City, Pittsburg and Gulf Railroad Company (KCP&G) was completed.

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The 1990s also saw KCSI expand into Mexico with the acquisition of partial interests in the Texas Mexican Railway (TM) and Grupo Transportación Ferroviaria Mexicana (TFM).

TFM was created when KCSI and Transportacion Maritima Mexicana (TMM) purchased a government concession to operate a rail system in Mexico.

[32] The transaction closed in early 2022, following which KCS was held in a previously-approved voting trust pending approval by the STB; the combined company was to be named Canadian Pacific Kansas City (CPKC).

[33][34] The combined "Canadian Pacific Kansas City Limited" would form the first railroad serving all of the countries in the North American trade zone (Canada, Mexico and the United States).