IC Bus (originally IC Corporation) is an American bus manufacturer that produces yellow school buses and commercial-use buses (shuttle buses) primarily for the United States and Canada, with limited exports outside North America. Headquartered in Lisle, Illinois, IC is a wholly owned subsidiary of Navistar International. The company was established by Navistar in 2002 through a reorganization of its subsidiary bus manufacturer American Transportation Corporation (AmTran). Through AmTran, IC traces its roots back to the 1933 founding of Ward Body Works in Conway, Arkansas. The IC company name stands for Integrated Coach, alluding to how the vehicles are nearly completely assembled under a single corporate structure. For all IC vehicles, Navistar produces the bus body, chassis, and engine. Currently, all IC Bus vehicles are produced at its manufacturing facility in Tulsa, Oklahoma; since 2010, the former AmTran/Ward manufacturing facility in Conway, Arkansas has remained in use for fabrication and the production of parts.
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