InterContinental is the hotel company with the largest number of rooms in the world. They have increased the number of rooms available by 49% since 1995 to a total of 532,701. Cendant is a close second followed by Marriott, Accor, and Choice Hotels. Hilton International was the leader in growth since 1995 by nearly tripling the rooms that they offer.

• InterContinental, 532,701 rooms, up 49 percent
• Cendant, 520,860 rooms, up 26 percent;
• Marriott, 469,218 rooms, up 154 percent;
• Accor, 463,427 rooms, up 81 percent;
• Choice, 403,806 rooms, up 37 percent.

Via the NY Times.