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Shake Shack
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<p>Shake Shack is an American <a href="/facts/Fast_casual/HC31lBa9">fast casual</a> restaurant chain based in New York City. It started out as a hot dog cart inside <a href="/facts/Madison_Square/qzR4XduB">Madison Square Park</a> in 2001, and its popularity steadily grew. In 2004, it received a permit to open a permanent kiosk within the park, expanding its menu from New York–style hot dogs to one with hamburgers, hot dogs, fries and its namesake <a href="/facts/Milkshake/gCu7mQg5">milkshakes</a>. </p><p>Since its founding, it has been one of the fastest-growing food chains, eventually becoming a public company filing for an initial public offering of stock in late 2014. The offering priced on January 29, 2015; the initial price of its shares was at $21, immediately rising by 123% to $47 on their first day of trading. </p><p>Shake Shack Inc. owns and operates over 400 locations globally. </p>