<Tr> <Th> Number of employees </Th> <Td> 79,000 + (2018) </Td> </Tr> <Tr> <Th> Website </Th> <Td> www.oreillyauto.com </Td> </Tr> <P> O'Reilly Auto Parts is an American auto parts retailer that provides automotive aftermarket parts, tools, supplies, equipment, and accessories in the United States serving both the professional service providers and do - it - yourself customers . Founded in 1957 by the O'Reilly family, the company operates more than 5,100 stores in 47 states . </P> <P> O'Reilly Automotive, Inc. officially started in the auto parts business with one store in Springfield, Missouri, in December 1957 . </P>

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