Marriott International has completed its $13.6bn acquisition of Starwood Hotels & Resorts, and immediately announced plans to link up the group's guest loyalty programmes. The merger sees the creation of the world's largest hotel group, with over 5,700 properties under 30 brands in more than 110 countries.

In 2025, Marriott International completed a strategic acquisition of the citizenM brand, a deal that officially integrated over 35 tech-forward, high-design hotels and nearly 9,000 rooms into the Marriott Bonvoy ecosystem. While not a "mega-merger" on the scale of the Starwood acquisition years ago, this move significantly bolstered Marriott's presence in the boutique and urban "lifestyle" segment. Additionally, in early 2026, Marriott has focused on the global rollout of Series by Marriott™, a new midscale and upscale collection brand that initially launched with a major multi-unit deal in India. Marriott continues to expand through these types of acquisitions and brand launches rather than merging with other major hotel giants like Hilton or IHG. As of late 2025, Marriott oversees a massive portfolio of over 9,700 properties across 30+ brands, maintaining its position as the world's largest hotel company.