O'Reilly Automotive, Inc. is a prominent retailer of automotive parts and accessories in the United States. Founded in 1957 by Charles O'Reilly and his brothers, the company has grown to operate over 5,600 stores across 47 states. O'Reilly offers a wide range of products, including batteries, brakes, and engine components, catering to both professional mechanics and DIY enthusiasts. The company is headquartered in Springfield, Missouri, and is known for its commitment to customer service and knowledgeable staff. O'Reilly Automotive also provides various services, such as tool rental and battery testing, enhancing the shopping experience for its customers.