Sumitomo Corporation
The company was founded in 1962, when it split from OK Tires, it was headquartered in Englewood Colorado. In 1996, it was acquired by TBC Corporation, which also owns Tire Kingdom and NTB. In 2006, TBC was acquired by Sumitomo Corporation of Americas. In 2018, Michelin North America Inc. (MNAI) and Sumitomo Corporation of Americas (SCOA) announced a definitive agreement to combine their respective North American replacement tire distribution and related service operations in a 50–50 joint venture. Big O Tires remains a wholly owned subsidiary of TBC Corporation.