ACER has updated Annex VII of its Manual of Procedures and related FAQs on how to report inside information under REMIT. The aim is to further harmonise the disclosure of inside information by providing additional guidance and improve overall data quality of inside information.
What is ‘inside information’ and why does it matter?
The Regulation on Wholesale Energy Market Integrity and Transparency (REMIT) is the EU-wide framework that aims to prevent wholesale energy market abuse and support fair competition.
Under REMIT, information is considered ‘inside information’ if it is:
- precise in nature;
- not yet public;
- directly or indirectly related to wholesale energy products; and
- likely to significantly affect wholesale energy prices if made public.
REMIT requires companies to disclose inside information (such as planned power outages for maintenance, or disruptions to transmission or gas storage), so that all players have the same information at the same time. This helps energy market transparency and integrity.
ACER’s REMIT Manual of Procedures provides guidance on how to report data, including inside information.
What’s new in the Manual?
The update focuses on Annex VII of the Manual (concerning inside information) and introduces clarifications and improvements. These include clearer terminology, updates to urgent market messages (related to the public disclosure and reporting of inside information), guidance on the disclosure of overlapping unavailability events and revised definition of the affected asset code.
Market participants have nine months to implement these changes and comply with the new version of the guidance (i.e. by December 2026).
Coming soon
- ACER public consultation on a new guideline on REMIT transaction reporting.
- ACER and European Commission webinar: New rules for energy market integrity and transparency (23 April 2026).
- ACER and European Commission annual REMIT workshop (11 June 2026).
