Sonic Drive-In is an American drive-in fast-food restaurant chain based in Oklahoma City, Oklahoma. As of August 31, 2011, there were 3,561 restaurants in 43 U.S. states, serving approximately 3 million customers per day. In 2011, it was ranked 10th in QSR Magazines rankings of the top 50 quick-service and fast-casual restaurant brands in the nation. Known for its use of carhops on roller skates, the company annually hosts a competition to determine the top skating carhop in its system. It also hosts, with Dr Pepper, an internal competition between drive-in employees. The company's slogan is Americas Drive-In. Although Sonic has operated since the early 1950s, Sonic Corp. was incorporated in the State of Delaware in 1990. It has its corporate headquarters in Oklahoma City, Oklahoma. Its stock trades on NASDAQ with the symbol SONC. Company restaurants are owned and operated by Sonic Restaurants, Inc., a wholly owned subsidiary.
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