Shake Shack, Inc. engages in the operation and licensing of Shake Shack restaurants which serve burgers, hot dogs, crinkle cut fries, shakes, frozen custard, beer, wine, and more. The company is headquartered in New York City, New York and currently employs 11,316 full-time employees. The company went IPO on 2015-01-30. The Company’s menu focuses on food and beverages, crafted from a range of American foods. Its burger categories include ShackBurger, SmokeShack, Shroom Burger (a vegetarian burger), Shack Stack, Avocado Bacon Burger and Hamburger. Its chicken products include Chicken Shack and Chicken Bites. The company also offers wines, including Shack Red, Shack White, and Shack Rose. In addition, it serves Abita Root Beer, Shack-made lemonade, organic fresh brewed iced tea, Fifty/Fifty (half lemonade, half organic iced tea), Honest Kids organic apple juice, and Shack20 bottled water. The company operates in approximately 400 locations system-wide, including over 260 in 32 United States and the District of Columbia, and over 140 international locations across London, Hong Kong, Shanghai, Singapore, Mexico City, Istanbul, Dubai, Tokyo, Seoul and more.