CSK Auto Corporation | 769 followers on LinkedIn. CSK Auto Corporation is owned and operated by O’Reilly Auto Parts, who serves two distinct customer bases - the professional (installer) customer who provides auto repair services to their customers (DIFM - do it for me), and retail walk-in customers (DIY - do it yourself). Now, more than 60 years later, the 75,000-plus team members at O’Reilly Auto Parts are proud of the company’s achievements over the years. They have grown through new store and distribution center openings, as well as numerous mergers and acquisitions.