Springfield, MO and Phoenix, AZ – April 1, 2008 — O’Reilly Automotive, Inc. (“O’Reilly”) (Nasdaq: ORLY) and CSK Auto Corporation (NYSE:CAO) (“CSK”) today announced that the two companies have signed a definitive merger agreement under which O’Reilly will acquire all of the outstanding shares of CSK common stock pursuant to an exchange offer, in a transaction valued at approximately $1.0 billion, including approximately $500 million of debt. The boards of directors of both companies have approved the transaction.
