100 Fastest-Growing rank: 12 (Previous rank: 11)
CEO: Jeffery H. Boyd
Address: 800 Connecticut Ave., Norwalk, Connecticut
It was another great year for the travel booking service, which saw profits climb to $528 million last year on sales of nearly $3.1 billion. That uptick was driven largely by international sales, which accounted for 69% of the company's overall bookings and Booking.com, the Connecticut-based international hotel reservations site it bought back in 2004.
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