O'Reilly Automotive, Inc. to Present at the William Blair 26th Annual Growth Stock Conference

SPRINGFIELD, Mo.--June 22, 2006--O'Reilly Automotive, Inc. (the "Company") plans to make a presentation at the William Blair and Company 26th Annual Growth Stock Conference in Chicago, Illinois, on Thursday, June 29, 2006, at 10:30 a.m. Central time.

The slides for the presentation will be available Thursday, June 29, 2006, through the Company's website at www.oreillyauto.com by clicking "Investor Relations" then "Financials."

O'Reilly Automotive, Inc. is one of the largest specialty retailers of automotive aftermarket parts, tools, supplies, equipment and accessories in the United States, serving both the do-it-yourself and professional installer markets. Founded in 1957 by the O'Reilly family, the Company operated 1,506 stores within the states of Alabama, Arkansas, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Minnesota, Mississippi, Missouri, Montana, Nebraska, North Carolina, North Dakota, Oklahoma, South Carolina, South Dakota, Tennessee, Texas, Virginia, Wisconsin and Wyoming as of March 31, 2006.

The Company claims the protection of the safe-harbor for forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements can be identified by forward-looking words such as "expect," "believe," "anticipate," "should," "plan," "intend," "estimate," "project," "will" or similar words. In addition, statements contained within this press release that are not historical facts are forward-looking statements, such as statements discussing among other things, expected growth, store development and expansion strategy, business strategies, future revenues and future performance. These forward-looking statements are based on estimates, projections, beliefs and assumptions and are not guarantees of future events and results. Such statements are subject to risks, uncertainties and assumptions, including, but not limited to, competition, product demand, the market for auto parts, the economy in general, inflation, consumer debt levels, governmental approvals, our ability to hire and retain qualified employees, risks associated with the integration of acquired businesses, weather, terrorist activities, war and the threat of war. Actual results may materially differ from anticipated results described or implied in these forward-looking statements. Please refer to the Risk Factors sections of the Company's Form 10-K for the year ended December 31, 2005, for more details.