Sonic (NASDAQ: SONC) operates and franchises a chain of quick-service drive-in restaurants in the United States. The company also leases and signs real estate. Sonic’s business strategy is to maintain strong real sales growth, provide industry-leading customer frequency, and generate high returns for its stockholders. For more information visit the company’s Web site at: www.sonicdrivein.com

William Blair & Company is a global investment banking and asset management firm committed to building enduring relationships with clients and providing expertise and solutions to meet their evolving needs. An independent and employee-owned firm, William Blair is based in Chicago, and has office locations in 10 cities, including London, New York, Shanghai, and Zurich. For more information on William Blair & Company, visit www.williamblair.com

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