The UK Competition and Markets Authority (CMA) has launched a formal investigation into Hilton, Marriott, and IHG Hotels over allegations they shared competitively sensitive information using industry data provider STR. The probe centers on whether these hotel giants exploited STR's analytics platform to exchange confidential data about pricing and market conditions. This practice, if proven, could undermine competitive dynamics by allowing rivals to predict each other's moves more easily. The CMA warned that such information sharing among competitors reduces market uncertainty and facilitates coordination, potentially harming consumer choice and prices.

STR, owned by CoStar Group, provides data to approximately 90,000 hotels globally. The investigation follows similar CMA actions against UK housebuilders who shared pricing data, resulting in a £100 million settlement for affordable housing programs. The hotel sector probe underscores regulators' growing scrutiny of data-driven collusion across industries. Companies involved face penalties of up to 10% of global revenue if found in violation, with individuals also subject to fines and disqualification. Leniency programs offer reduced penalties for early cooperation.

Hilton, Marriott, and IHG have not yet commented publicly on the investigation, while STR expressed surprise at the CMA's interest but stated it is cooperating fully. The probe represents a significant escalation in regulatory oversight of data practices within the hospitality sector, with implications for how hotel operators use third-party analytics platforms. The outcome could set precedents for similar investigations globally, particularly as regulators increasingly examine the competitive impacts of data sharing agreements.