UK Competition Authority Launches Probe into Marriott, Hilton and IHG Over Alleged Data Sharing

MAR
March 03, 2026

The UK Competition and Markets Authority (CMA) announced today that it has opened a formal investigation into Marriott International, Hilton Worldwide and InterContinental Hotels Group. The probe focuses on the three hotel chains’ use of the STR data‑analytics platform, owned by CoStar, to share competitively sensitive information that could undermine market competition.

The CMA’s complaint alleges that the hotels may have exchanged data that reduces uncertainty about each other’s pricing and market‑share strategies, potentially facilitating coordinated price setting. If the regulator finds evidence of anti‑competitive conduct, it could impose fines, require operational changes or even mandate the separation of the data‑sharing arrangements.

Marriott’s inclusion in the investigation is significant because the company operates over 9,700 properties worldwide and relies heavily on data analytics to set rates and manage inventory. A regulatory finding could constrain Marriott’s ability to use shared data for pricing decisions, impacting its revenue management model and potentially eroding its competitive advantage in the global hospitality market.

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