The Global Legal Entity Identifier Foundation and Global Energy Monitor have completed the first certified mapping between GEM Entity ID and the Legal Entity Identifier, creating a standardized open-data link that allows users to trace the legal ownership of energy assets worldwide. The first open mapping file is due to be published in June 2026, with integration into GLEIF’s API and LEI Search to follow. The mapping addresses ownership opacity across hundreds of thousands of assets, including coal mines, combustion power plants, iron and steel plants, cement plants, oil extraction fields and gas pipelines. GLEIF says the link will help companies meet climate-related reporting and due diligence requirements, including under the EU Corporate Sustainability Due Diligence Directive, while also supporting investor portfolio screening and allowing regulators to cross-check reported ownership structures against authoritative open-source data. GEM is the first energy-sector member of GLEIF’s Global Open Data Integration Network to complete a mapping certification, using GLEIF’s service to connect an existing identifier to the LEI and reduce fragmentation across data sources.