A handful of companies hold the keys to millions of hotel rooms globally, but the list of hotel brands that those companies own is legion. Marriott owns Fairfield, TownePlace and Moxy; Hilton owns Curio, DoubleTree and Hampton; Intercontinental owns Holiday Inn, Candlewood and Hotel Indigo, to name a few. With a $12.2 billion merger of Marriott and Starwood in the works, here’s a brief rundown, in order of total rooms controlled, of who owns what.

Marriott International Inc.-Starwood Hotels & Resorts Worldwide Inc.

BRANDS: The Ritz-Carlton, BVlgari, EDITION, JW Marriott, Autograph Collection Hotels, Renaissance Hotels, Marriott Hotels, Delta Hotels and Resorts, Marriott Executive Apartments, Marriott Vacation Club, Gaylord Hotels, AC Hotels by Marriott, Courtyard, Residence Inn, SpringHill Suites, Fairfield Inn & Suites, TownePlace Suites, Protea Hotels, and Moxy Hotels, St. Regis, The Luxury Collection, W, Westin, Le Méridien, Sheraton, Four Points by Sheraton, Aloft, and Element.

PROPERTIES: 5,397.

ROOMS: 1,068,990.

REVENUE PER AVAILABLE ROOM: $123.08 (Starwood) to $128.88 (Marriott).

REVENUE: About $15 billion combined.

Hilton Worldwide Holdings Inc.

BRANDS: Hilton Hotels & Resorts, Waldorf Astoria Hotels & Resorts, Conrad Hotels & Resorts, Canopy by Hilton, Curio -A Collection by Hilton, DoubleTree by Hilton, Embassy Suites Hotels, Hilton Garden Inn, Hampton Hotels, Homewood Suites by Hilton, Home2 Suites by Hilton and Hilton Grand Vacations.

PROPERTIES: 4,322.

ROOMS: 715,062.

REVENUE PER AVAILABLE ROOM: $105.63.

REVENUE: $10.5 billion.

Intercontinental Hotels Group Plc.

BRANDS: InterContinental, HUALUXE, Crowne Plaza, Hotel Indigo, Holiday Inn, Holiday Inn Express, Candlewood Suites, Staybridge Suites, EVEN, and Kimpton.

PROPERTIES: 4,864.

ROOMS: 701,522.

REVENUE PER AVAILABLE ROOM: Not Available.

REVENUE: $1.89 billion.

Wyndham Worldwide Corp.

BRANDS: Wyndham Hotels and Resorts, Ramada, Days Inn, Super 8, Howard Johnson, Wingate by Wyndham, Microtel Inns & Suites, Tryp by Wyndham, RCI, Landal GreenParks, Novasol, Hoseasons, cottages4you, James Villa Holidays, Wyndham Vacation Rentals, Wyndham Vacation Resorts, Shell Vacations Club, and WorldMark by Wyndham.

PROPERTIES: 7,848.

ROOMS: 684,470.

REVENUE PER AVAILABLE ROOM: $37.57

REVENUE: $5.28 billion.

Choice Hotels International:

BRANDS: Comfort Inn, Comfort Suites, Quality, Sleep Inn, Clarion, Cambria hotels & suites, MainStay Suites, Suburban Extended Stay Hotel, Econo Lodge and Rodeway Inn brands.

PROPERTIES: 6,379.

ROOMS: 505,278.

REVENUE PER ROOM: $45.80.

REVENUE: $758 million.

Accor S.A. (France)

BRANDS: Sofitel, Pullman, MGallery, Grand Mercure, The Sebel, Novotel, Suite Novotel, Mercure, Adagio, Adagio Access, ibis, ibis Styles, ibis budget, hotelF1, and Thalassa.

PROPERTIES: 3,711.

ROOMS: 495,766.

REVENUE PER ROOM: Not Available.

REVENUE: $5.45 billion.

Hyatt Hotels Corp.

BRANDS: Hyatt, Park Hyatt, Andaz, Grand Hyatt, Hyatt Regency, Hyatt Place, Hyatt House, Hyatt Ziva, Hyatt Zilara, Hyatt Residence Club, Hyatt Gold Passport, and Hyatt Resorts.

PROPERTIES: 587.

ROOMS: 155,265.

REVENUE PER AVAILABLE ROOM: $168.

REVENUE: $4.42 billion.