Updated REMIT framework strengthens trust in EU energy markets

Europe has an EU-wide framework (called “REMIT”) to detect and deter market manipulation and abuse in wholesale energy markets. The Regulation was revised in 2024 to keep pace with evolving market dynamics. To make the framework fully operational, REMIT secondary legislation has also been updated with a recast REMIT Implementing Regulation and a new Delegated Regulation, both entering into force on 29 April 2026 (i.e. 20 days after their publication today in the Official Journal).

This reinforced REMIT framework enhances transparency and trust in the integrity of Europe’s energy markets. To support understanding and compliance with the new obligations, ACER has published two open letters (one on the recast Implementing Regulation and the other on the new Delegated Regulation).

In the coming weeks, ACER will also seek stakeholder input, via a public consultation, on a new guideline to help REMIT data reporting parties comply with their new obligations.

Key changes

1. The recast Implementing Regulation sets out updated rules for reporting energy market data to ACER, directly affecting all reporting parties (e.g. market participants, organised market places, registered reporting mechanisms and others). It aims to reduce reporting burdens while enabling more effective market monitoring and detection of potential abuses.

ACER’s open letter explains what has changed, focusing on the provisions that will enter into force first and on ensuring compliance with the new act. It covers:

• new ‘exposure reporting’;
• new reporting timelines; and
• new obligations for organised marketplaces.

See also ACER’s evaluation of responses to the recent public consultation on the usefulness of ISO standards for exposure reporting.

2. The new Delegated Regulation introduces authorisation and supervision processes (including withdrawal and orderly substitution) for: 

• Registered reporting mechanisms (RRMs): entities authorised to report energy data to ACER, either on their own behalf or on behalf of companies.
• Inside information platforms (IIPs): online platforms where companies publicly disclose inside information (like power outages or capacity issues) so that all market participants can access it at the same time. IIPs are also officially authorised to report this information to ACER on behalf of companies.

ACER’s open letter on the Delegated Regulation explains: 

• the transitional period and the status of registered RRMs and IIPs during this period;
• the authorisation of new and registered RRMs and IIPs, including the requirement to be established in the EU; and
• key changes for ‘clients’ of RRMs and IIPs (e.g. market participants submitting or accessing energy data) under the new authorisation regime.

Together, these two acts aim to improve standardised data reporting, strengthen the supervision of REMIT data reporting entities and help ensure transparency and integrity in EU wholesale energy markets. 

Why does this matter?

The updated REMIT framework helps ensure that energy markets operate fairly, preventing market manipulation and insider trading, and ensuring important information is shared so that all market players compete on an equal footing. 

What’s next?

• ACER public consultation on a new guideline on REMIT transaction reporting to reflect evolving obligations under the revised framework (16 April - 12 June 2026).
• ACER and European Commission webinar: New REMIT implementing rules for energy market integrity and transparency (23 April 2026).
• ACER and European Commission annual REMIT workshop (11 June 2026).
• ACER consultations with targeted stakeholders on guidance documents for data reporting (including on the revised electronic formats). The revision process will be gradual, in line with the phased entry into force of new obligations, and will involve stakeholder consultation.