Shake Shack is an American fast casual restaurant chain based in New York City. It started out as a food cart inside Madison Square Park in 2004, and its popularity steadily grew. It eventually moved to a stand within the park, expanding its menu from New York-style hotdogs to one with hamburgers, hotdogs, fries and its namesake milkshakes. The company prides itself and emphasizes its use of all-natural 100% angus beef only and that its meat is completely free of hormones and antibiotics. 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. Initial price of its shares was at $21 immediately rising by 123% to $47 on their first day of trading. In 2000, New York City began the rebuilding of Madison Square Park, which had fallen into a state of disrepair and misuse. As part of the redevelopment, restaurateur Danny Meyer helped spearhead the creation of the Madison Square Park Conservancy to help redevelop it. One of the first things the Conservancy did in its goal to turn the park around was to host an art exhibit, called "I <3 Taxi," inside of the park to raise awareness of the renewal effort. Meyers Director of operations, Randy Garutti, established a hot dog cart which was run out of the kitchen of Eleven Madison, one of Meyers Union Square Hospitality Group (USHG) operations. Over time the cart became extremely successful, and remained in operation for nearly three years.