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Sonic to Present at the 2005 RBC Capital Markets Consumer Conference

Sonic Corp. (Nasdaq: SONC), the nation's largest chain of drive-in restaurants, today announced that it will participate in the 2005 RBC Capital Markets Consumer Conference that takes place in Orlando September 27-29.

September 18, 2005

OKLAHOMA CITY, Sept. 19 /PRNewswire-FirstCall/--Sonic Corp. (Nasdaq: SONC), the nation's largest chain of drive-in restaurants, today announced that it will participate in the 2005 RBC Capital Markets Consumer Conference that takes place in Orlando September 27-29. The investor presentation by Sonic's management is scheduled at 8:30 a.m. ET on Thursday, September 29, 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, http://www.sonicdrivein.com, and the event will be available for replay using that same link for 30 days.

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 approximately 3,000 drive-ins coast to coast and in Mexico. More than a million customers eat at Sonic every day. For more information about Sonic Corp. and its subsidiaries, visit Sonic at http://www.sonicdrivein.com.