European Union – November 10, 2026 -- The EU Agency for energy regulation ACER screened more than 14,000 alerts for potential market abuse in 2025 and shared over 1,300 cases with national regulators, leading to fines of more than €13 million under REMIT, according to its 2025 Consolidated Annual Activity Report.
The Administrative Board adopted the report on 28 May 2026, after approval by the Board of Regulators.
ACER collected more than 19 billion transaction records under REMIT in 2025
The agency published its first surveillance performance reports. It supported the implementation of revised REMIT and the European Commission's preparation of the REMIT Implementing Regulation. It also supported the Delegated Act for registered market participants and inside information platforms. ACER launched the new REMIT Data Reference Centre and Inside Information Access Point.
EU day-ahead and intra-day markets moved to a 15-minute time unit in 2025
The change is designed to integrate renewable energy sources better. ACER worked to foster demand response and flexibility, monitored related market barriers and tracked the integration of additional transmission system operators (TSOs) into EU balancing platforms. It contributed to the investigation of major incidents, including the Iberian blackout, and continued work on the Network Code on Cybersecurity for cross-border electricity flows.
ACER took on new gas and hydrogen tasks under the recast Gas Regulation
The agency developed a cost-efficiency comparison framework for natural gas TSOs. It also revised the Capacity Allocation Mechanisms and Interoperability Network Codes. ACER continued monitoring wholesale gas and liquefied natural gas (LNG) markets and expanded its hydrogen market monitoring.
ACER approved the European Resource Adequacy Assessment and issued an EU-wide flexibility methodology
Its Decision on an EU-wide methodology to assess flexibility needs in Europe marked the first milestone of a new flexibility workstream. Monitoring reports also identified best practices in transmission and distribution tariff methodologies. ACER continued to assess EU infrastructure planning, setting out possible process improvements in several opinions and reports.