This Register is a centralised record of annual rates of CO₂ stored underground at operational projects worldwide. Funded by the UK Royal Academy of Engineering and supported by a consortium of partners from academia, industry, and government, it combines data reported directly by operators with information from public sources to provide a standardised account of annual CO₂ storage. Please contact us with any questions or interest in the project. The 2025 release includes: Annual Report 2025 — A narrative summary of the data in the Register. The London Register of Subsurface CO₂ Storage — The full database in .xls format. Data Assurance — An independent third party data quality assurance report from DNV. Suggested citation Gao, X., & Krevor, S. (2025). The London Register of Subsurface CO₂ Storage: 2025 Annual Report. Imperial College London. All materials were updated on 22 December 2025.