Overview
- UK regulators are examining whether Hilton, IHG and Marriott shared competitively sensitive information via CoStar’s STR analytics platform.
- CoStar, including its UK unit, and the three hotel groups have been formally named as parties under investigation.
- The CMA says information exchange through third‑party tools can reduce competitive uncertainty and make coordination easier.
- The investigation opened on 24 February 2026, with an information‑gathering phase scheduled from February to August 2026.
- The authority reminded relevant parties to preserve documents under section 25B and pointed to its leniency and informant reward channels.