As of August 2016, Marriott International operates 1,128,224 guestrooms across multiple brands, with a significant pipeline of 346,845 hotels. The acquisition of Starwood Hotels & Resorts has expanded Marriott's portfolio to 27 brands, including luxury, upper upscale, and various other categories. The data presented reflects the counts of open hotels and those in the pipeline, showcasing Marriott's growth and market presence.