Chief executive officer of GrubHub, MattMaloney, takes part in an interview after the company's IPO on the floor of the New York Stock Exchange in New York April 4, 2014. Shares of GrubHub Inc, the biggest U.S. online food-delivery service, rose as much as 57 percent in its market debut as investors scrambled for a piece of the fast-growing consumer internet company. REUTERS/Lucas Jackson (UNITED STATES - Tags: BUSINESS PROFILE HEADSHOT)