FILE - Shake Shack CEO Randy Garutti, center, joined by company CFO Jeff Utz, left, and founder Danny Meyer, celebrate during opening bell ceremonies at the New York Stock Exchange, Jan. 14, 2016.
Shake Shack CEO Randy Garutti will retire next year with the burger and milkshake chain gaining significant momentum as it undergoes a significant expansion. Garutti will remain with the company until ...