UK Watchdog Opens Data-Sharing Probe Into Hilton, Marriott, and IHG
Competition and Markets Authority investigates whether hotel giants exchanged sensitive pricing information through CoStar's STR analytics platform.
The UK Competition and Markets Authority launched a formal investigation into Hilton, Marriott, and InterContinental Hotels Group on 2 March 2026, examining whether the three hospitality giants illegally shared competitively sensitive data through a third-party analytics platform owned by CoStar. The probe marks a notable expansion of antitrust scrutiny beyond technology platforms into data-intensive sectors where competitor information exchange may distort pricing competition.
The Mechanics of Alleged Coordination
The investigation centers on The Business Desk‘s reporting that the chains used STR, a hotel data analytics tool owned by Washington-based CoStar Group. The CMA is examining suspected sharing of competitively sensitive information among the three hotel chains using the STR analytics platform. CoStar’s STR tool provides data on occupancy, average daily rates, and revenue per available room—metrics that enable hotels to calibrate room pricing in real time.
According to The Irish News, the CMA is investigating whether the four companies colluded over price by sharing information through data analytics tools and algorithms. STR aggregates data from 90,000 hotels representing 11.8 million guest rooms in more than 190 countries, making it the industry-standard benchmarking service. CoStar acquired STR in 2019 and has positioned the platform as essential infrastructure for revenue management across the global hotel sector.
The three hotel groups operate substantial UK footprints. Hilton operates over 200 UK hotels including Hampton, DoubleTree, and Hilton Garden Inn; IHG operates more than 300 hotels under Holiday Inn, Holiday Inn Express, and Crowne Plaza brands; Marriott maintains around 135 UK locations. Combined, these chains control a commanding share of the branded hotel market in major British cities.
Legal Theory and Competitive Risk
The CMA’s concern revolves around whether data exchange through a common platform reduces the competitive uncertainty that normally disciplines pricing behavior. When rivals share competitively sensitive information through a data provider, it can allow them to predict what each other will do and coordinate pricing, according to the watchdog. This mirrors enforcement theories gaining traction in the US, where the Department of Justice and Federal Trade Commission have argued that Morgan Lewis reports algorithmic pricing tools can facilitate tacit coordination even without explicit agreements.
The CMA emphasized that no assumptions should be made about whether the law has been broken, and following investigation it may issue a statement of objections if it provisionally concludes competition law was infringed. The probe will examine whether the hotels maintained independent pricing decisions or effectively delegated strategy to shared algorithmic recommendations—a question that has split US courts in similar cases involving rental housing and hotel pricing software.
Broader Enforcement Landscape
The UK investigation arrives as hospitality chains face mounting scrutiny over pricing practices globally. Multiple US class-action lawsuits have targeted hotels for allegedly using common revenue management software to artificially elevate room rates. In February 2025, a California federal court dismissed claims against six hotel operators accused of price-fixing through algorithmic tools, finding plaintiffs failed to demonstrate that confidential information was actually pooled across competitors. However, other cases remain active, and Skift notes that US Antitrust agencies have filed statements of interest arguing that shared use of pricing software in concentrated markets risks violating antitrust law.
The CMA probe represents the first major European enforcement action targeting data exchange in hospitality. The investigation is part of the CMA’s wider commitment to ensuring new technologies support fair competition and do not harm consumers. This signals that regulators view algorithmic pricing and third-party data intermediaries as enforcement priorities across sectors, not solely in technology markets where platforms like Google and Meta have dominated regulatory attention.
- First formal European antitrust action targeting competitor data sharing in hospitality sector
- Tests whether information exchange through analytics platforms constitutes illegal coordination under UK competition law
- Could establish precedent for scrutiny of data-intensive industries beyond Big Tech
- Outcome may influence treatment of algorithmic pricing tools across commercial real estate, aviation, and other yield-managed sectors
What to Watch
The investigation timeline remains unclear, but the CMA typically conducts 12–18 months of fact-gathering before issuing provisional findings. Key questions include whether the hotels exchanged forward-looking pricing intentions, whether they committed to follow STR’s recommendations, and whether the platform’s aggregated reporting sufficiently anonymized competitor data. The regulator has authority to impose fines up to 10% of global turnover for competition law violations and can demand behavioral commitments to resolve concerns.
Parallel developments in the US—where multiple hotel pricing cases are working through district courts—may inform the CMA’s analysis. If the UK proceeds to formal charges, it would mark the first major test of how competition authorities evaluate competitor data exchange in an era where revenue management software has become standard infrastructure. The precedent could reshape compliance expectations for any industry where rivals use common analytics vendors to inform pricing, capacity, or commercial strategy.