No, IHG (InterContinental Hotels Group) is not part of Marriott International; they are two separate and competing global hospitality giants. IHG is a British multinational company headquartered in the United Kingdom and manages a massive portfolio that includes brands such as Holiday Inn, Crowne Plaza, InterContinental, Kimpton, and Hotel Indigo. Marriott International, based in Bethesda, Maryland, is an American company that owns and franchises brands like The Ritz-Carlton, Sheraton, Westin, and Courtyard. Because they are independent entities, their loyalty programs—IHG One Rewards and Marriott Bonvoy—are not interoperable. You cannot transfer points between the two systems, and elite status earned at an IHG property will not be recognized at a Marriott hotel. This distinction is vital for frequent travelers who "brand-loyal" to maximize their points and benefits within a single ecosystem.