O'Reilly Automotive is one of North America's largest specialty retailers of automotive aftermarket parts, tools, supplies, and accessories, serving both do-it-yourself consumers and professional service providers through a network of stores across the United States, Mexico, and Canada. The company generates revenue equally from two customer channels: professional service providers who order through dedicated sales staff and online platforms, and DIY consumers who shop at retail locations, through its e-commerce website with in-store pickup and home delivery options, and via a loyalty program. O'Reilly stocks an extensive inventory of both nationally recognized brands and proprietary private label products across multiple price tiers, supported by a tiered distribution network of regional distribution centers and hub stores that enable rapid parts availability, and supplements product sales with services such as battery testing, check engine light diagnostics, custom hydraulic hoses, and drum/rotor resurfacing.