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Sonic to Present At the Bank of America 37th Annual Investment Conference

OKLAHOMA CITY (September 11, 2007) - Sonic Corp. (NASDAQ: SONC), the nation's largest chain of drive-in restaurants, today announced that the company will participate in the Bank of America 37th Annual Investment Conference, which takes place September 17-19 in San Francisco. The investor presentation by Sonic's management is scheduled at 2:00 p.m. PT (5:00 p.m. ET) on Tuesday, September 18, 2007, and will be available to investors via a live audio webcast. A link to the webcast can be found at the investor section of the company's website, www.sonicdrivein.com, and the event will be available for replay through Friday, October 5, 2007, using that same link.

Sonic, America's Drive-In, originally started as a hamburger and root beer stand in 1953 in Shawnee, Okla., called Top Hat Drive-In, and then changed its name to Sonic in 1959. The first drive-in to adopt the Sonic name is still serving customers in Stillwater, Okla. Sonic has more than 3,300 drive-ins coast to coast and in Mexico, where more than a million customers eat every day. For more information about Sonic Corp. and its subsidiaries, visit Sonic at www.sonicdrivein.com.

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