The story
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.
In 1977, Big O Tires was awarded $19.6 million from Goodyear in a case over the use of the name "bigfoot" tires. The award equaled 25% of Goodyear's advertising budget in the states where Big O operated. It was later reduced on appeal and settled out of court.
From Wikipedia’s article on Big O Tires, shared under CC BY-SA 4.0.4