GrubHub CEO Matt Maloney (C) applauds after ringing the opening bell before the company's IPO on the floor of the New York Stock Exchange in New York April 4, 2014. REUTERS/Lucas Jackson
Thomson Reuters

GRUB GrubHub

41.61 6.61 (+18.90 %)

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Online food delivery service GrubHub saw a big uptick in customers during the first three months of the year, sending its shares surging more than 18% in mid-day trading on Thursday.

The company said “active diners” on its app totaled 8.75 million in the first quarter of the year, up 26% from the year-ago period. Gross food sales of $828 million were also up 26%.

GrubHub CEO…