SHERIDAN, WYOMING - March 31, 2026 - Energy traders, compliance teams and market surveillance leaders in Europe face a more direct enforcement environment in 2026 as ACER sets the procedural framework for cross-border REMIT investigations and advances new reporting guidance under the revised regime. The 43rd edition of ACER's REMIT Quarterly centers on new Rules of Procedure for cross-border investigations, a practical step after EU legislators updated the REMIT framework in 2024 and gave ACER additional tasks, including the power to investigate cross-border cases. The quarterly also outlines ACER's stakeholder engagement plan for 2026, ongoing preparatory work on data reporting pending finalisation of the revised REMIT Implementing Regulation, and market surveillance updates tied to wholesale energy market integrity across the EU.
Cross-border enforcement framework
Europe's REMIT regime is designed to detect and deter market manipulation and abuse in wholesale energy markets, with the stated objective of improving transparency and trust in market integrity. The latest ACER quarterly makes the operational change explicit: ACER now has a defined procedural framework for exercising its cross-border investigatory mandate under REMIT. That matters because trading activity, counterparties and reporting obligations in wholesale power and gas markets routinely extend beyond one national regulator's jurisdiction.
The quarterly links these new procedures directly to the 2024 legislative revision of REMIT. That revision expanded ACER's role from coordination and oversight into an authority with additional investigatory responsibilities in cross-border cases. For companies active on organised market places or in multi-country wholesale energy trading, the shift means supervisory expectations are becoming more centralized at the EU level even while national regulators remain active in case handling and sanctions.
Market surveillance and reporting pipeline
ACER's update provides several indicators of how active the enforcement and monitoring environment already is. At the end of the fourth quarter of 2025, 456 REMIT breach cases were under review. The quarterly also includes a case report on an attempt to manipulate the Spanish gas market that was investigated and sanctioned by Spain's energy regulator, CNMC. That example shows the practical connection between EU-wide market integrity rules and national enforcement actions in specific commodity markets.
The publication also points to a year-on-year increase in trading on Organised Market Places, driven by growth in natural gas forward markets. Alongside that trading expansion, ACER says it is continuing preparatory work on data reporting under the revised REMIT while the revised REMIT Implementing Regulation is still being finalized. ACER also signals that it will soon launch a public consultation on a new guideline on REMIT transaction reporting to reflect evolving obligations under the revised framework. The quarterly further captures takeaways from November 2025 expert group meetings on Wholesale Energy Market Data Reporting and the ACER-European Commission REMIT workshop, indicating that reporting architecture and supervisory practice are still being refined.
Business impact
Compliance directors and legal teams at energy trading firms need to treat 2026 as a control-reset year rather than a routine monitoring cycle. ACER's cross-border investigation procedures, combined with forthcoming transaction-reporting guidance, change how firms should prepare for inquiries that involve multiple jurisdictions, multiple counterparties and data drawn from several markets. Budget decisions in 2026 may need to prioritize surveillance tooling, audit trails for trades in natural gas forward markets, and faster escalation processes for suspicious trading patterns that could trigger REMIT review.
Operations directors, market surveillance managers and data governance leaders also face a concrete execution issue: reporting processes built for earlier REMIT obligations may not be sufficient once the revised Implementing Regulation and new ACER guideline are in place. These groups should review transaction reporting workflows, data retention policies and regulator-response procedures before the consultation and final rules reshape submission expectations. For procurement leads selecting compliance technology or advisory support, the key question in 2026 is whether vendors can support cross-border case readiness, REMIT data reporting updates and evidence management across EU wholesale energy operations rather than only national-level compliance needs.