REMIT II 2026: New data obligations for energy platforms

Key data

Platforms that manage or wish to manage the disclosure of insider information in EU wholesale energy markets have a new compliance obligation in force as of 24 February 2026. The Delegated Regulation (EU) 2026/255, published in the EU Official Journal on 9 April 2026, closes a relevant regulatory gap within the REMIT II framework: until now, the specific data that these entities had to submit to ACER to operate were not precisely specified.

This regulation is not a newly created rule from scratch. It complements Regulation (EU) No 1227/2011 —known as REMIT— which regulates the integrity and transparency of the wholesale energy market. REMIT II is the modernized reform of that framework, and this delegated regulation is one of its technical development pieces.

What does this regulation establish?

Delegated Regulation 2026/255 establishes two differentiated blocks of data requirements:

The objective is for ACER to have the information necessary to effectively authorize and supervise entities that manage the disclosure of insider information in European wholesale energy markets. Until this regulation came into force, those data requirements were not fully defined in the REMIT framework.

The two regulated figures are:

• Insider information platforms (IIP): entities that manage the publication and disclosure of insider information in wholesale energy markets.
• Registered data reporting mechanisms (RRDC): entities that facilitate the communication of transaction and order data to ACER on behalf of market participants.

Economic and operational impact

The direct impact of this regulation is operational and regulatory, not a fixed fee or cost established by the rule. The concrete effects for companies are:

• Internal adaptation cost: IIPs and RRDCs must review and update their data systems and reporting processes to comply with the new requirements before ACER. This involves internal or external technical and legal resources.
• Risk of loss of authorization: non-compliance with data requirements may result in withdrawal of authorization to operate. For an insider information platform, this is equivalent to the inability to continue its activity in the European market.
• Regulatory sanctions: in addition to loss of authorization, non-compliance may result in regulatory sanctions, although the specific amount of these is not specified in this delegated regulation.
• Indirect impact for energy companies: wholesale energy companies that contract IIP or RRDC services must verify that their providers are in compliance. A provider without valid authorization may compromise the client's own regulatory position.

Who does it affect?

• Insider information platforms (IIP): any entity that operates or plans to operate an insider information disclosure platform in EU wholesale energy markets.
• Registered data reporting mechanisms (RRDC): entities that communicate transaction data to ACER on behalf of market participants.
• Wholesale energy companies in the EU: any energy sector company that uses the services of an IIP or RRDC to comply with its transparency obligations under REMIT.
• Legal and compliance advisors in the energy sector who must verify the regulatory status of their clients or providers.

Practical example

A company that operates an insider information platform in the EU wholesale natural gas market and that until now had its authorization under the previous REMIT framework must, as of 24 February 2026, demonstrate to ACER that it complies with the new data requirements established by Delegated Regulation 2026/255.

If that platform does not update its documentation and reporting processes in accordance with the new requirements, ACER may initiate a supervision process that results in loss of authorization to operate. Wholesale energy companies using that platform to comply with their transparency obligations would then be left without an authorized provider, which would create a compliance problem for them before national regulators and ACER.

Similarly, a wholesale energy company that contracts a registered data reporting mechanism (RRDC) must actively verify that that provider has updated its authorization in accordance with the new regulation, and not assume that previous compliance remains automatically valid.

What should companies do now?

1. Identify if you are an IIP or RRDC: determine whether your company operates or plans to operate as an insider information platform or as a registered data reporting mechanism under REMIT. If so, you are directly obligated by this regulation.
2. Review current authorization with ACER: verify whether your current authorization covers the new data requirements established by Delegated Regulation 2026/255 or whether you need to update the submitted documentation.
3. Update data systems and processes: adapt your internal systems to be able to demonstrate to ACER the required data both at the time of authorization and continuously during supervision.
4. If you are a wholesale energy company: request written confirmation from your IIP and RRDC providers that they have updated their authorization in accordance with the new regulation. Do not assume that previous compliance remains in effect.
5. Consult the full text of the regulation: the specific data required by ACER are detailed in the articles of Delegated Regulation 2026/255, available in the EU Official Journal. Detailed legal analysis of those requirements is the prerequisite for any adaptation action.
6. Document compliance: maintain an updated record of actions taken to comply with the new requirements, as support in the event of possible inspections or requests from ACER.