Shake Shack is a fast casual restaurant chain that specializes in burgers, hot dogs, and milkshakes. The company was founded in 2004 by Danny Meyer and started as a hot dog cart in Madison Square Park in New York City. Shake Shack has since expanded to over 300 locations worldwide, including locations in the United States, Europe, and Asia. The company is known for its high-quality ingredients and commitment to sustainability. Shake Shack went public in 2015 and is traded on the New York Stock Exchange under the ticker symbol SHAK.