Who does REMIT apply to?

All entities wishing to participate in wholesale energy markets must complete the relevant registration or authorisation steps defined in REMIT or in the REMIT Implementing Regulation based on their role and activities. This ensures that ACER and national regulatory authorities (NRAs) can identify who is active in the market and monitor its compliance under REMIT.

The rules for registration or authorisation are set out in the:

• REMIT Implementing Regulation (revised in 2026), which outlines the registration requirements; and
• REMIT Delegated Regulation (adopted in 2026), which introduces the authorisation process for Inside Information Platforms (IIPs) and for Registered Reporting Mechanisms (RRMs), that will replace registration from November 2027.

Who needs to register?

• Market participants: Any person or company trading on EU wholesale markets, including non-EU/EEA entities.
• Organised Market places (OMPs): Energy exchanges, brokers or platforms facilitating multiple third-party transactions.

Who needs to be authorised?

• Inside Information Platforms (IIPs): Platforms through which market participants disclose information that could affect wholesale energy prices in real time.
• Registered Reporting Mechanisms (RRMs): Entities authorised to report transaction and fundamental data on behalf of themselves or market participants.

Market Participants are companies or individuals buying or selling wholesale energy products (e.g. electricity, gas, LNG). Before they start trading, participants must register with the national regulatory authority (NRA) of the country where they operate (Article 9 of REMIT). This includes non-EU entities active in EU markets. 

At national level, each regulator is responsible for maintaining a national register of market participants. At EU level, ACER manages the Centralised European Registry of Energy Market Participants (CEREMP), a central database collecting registration data from across the EU and supports NRAs’ national registration systems. This ensures a consistent and reliable identification of all participants across the Union. In 2025, more than 20,000 market participants submitted data to ACER.

Once registered, market participants must keep their information up to date. 

* Market participants trading LNG must follow an additional step. After registering with the relevant NRA, they must also register via ​ACER’s TERMINAL for LNG transaction reporting. With LNG data now falling within REMIT data collection, registration and reporting via TERMINAL will be discontinued in October 2027, in line with the 2026 REMIT Implementing Regulation.

Organised Market Places (OMPs) are platforms where multiple buyers or sellers interact to trade energy products (such as energy exchanges, brokers and capacity platforms). OMPs are responsible for reporting transactions executed on their platforms to ACER.

Before they can start offering wholesale energy products for trading, OMPs must first be added to ACER’s List of OMPs.

To be admitted, OMPs must submit a request through ACER’s OMP Listing Form, providing their identifying reference data (e.g. company and platform details). This submission serves both to notify ACER of the platform’s activity and to request inclusion in the official list.

Once formally recognised, OMPs must maintain accurate and up-to-date information. This ensures that ACER and NRAs can properly identify these platforms and monitor their activity.

Inside Information Platforms (IIPs) are dedicated platforms where energy market participants disclose information that could significantly affect wholesale energy prices (such as planned power outages for maintenance or capacity changes).

Why does REMIT require ‘inside information’ to be made public?

Disclosing market-sensitive ‘inside information’ publicly and in real time ensures that all market participants receive it transparently and at the same time. This helps ensure market integrity and transparency and allows regulators and market participants to act on the same set of information.

What is inside information?

​​​​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.

Typical examples of inside information include:

• power plant (planned or unplanned) outages or (planned) maintenance;
• changes in electricity or gas production; and
• disruptions to transmission or gas storage capacity.

Market participants are obliged to disclose such ‘inside information’ promptly and in a way that enables broad public access. ‘Urgent market messages’ are quick standardised announcements used to disclose inside information via central platforms (IIPs), which then aggregate and publish such messages to ensure wide dissemination.

Currently, there is no minimum threshold for reporting ‘inside information’: all events that could impact energy prices must be disclosed, even minor ones.

Accessing inside information

To simplify access to inside information, ACER’s Inside Information Access Point serves as a single gateway to information published across multiple approved IIPs, making it easier for market players to:

• Check and compare REMIT disclosures from several platforms.

• Access planned and unplanned disruptions of energy assets (such as outages, maintenance and service interruptions).
• View ‘urgent market messages’ across IIPs.
• Explore historical data from the past five years.

The Access Point is not intended for real-time trading decisions, as its dataset is refreshed daily rather than continuously. Market players should continue to consult individual Inside Information Platforms for real-time updates.

ACER is actively working to improve the Access Point and introduce new functionalities.

Registered reporting mechanisms (RRMs) are legal entities authorised to report wholesale energy market data to ACER, either on their own behalf or on behalf of other market participants. They play a central role in ensuring reported data is accurate and consistent across the EU.

The operation of RRMs is governed by the:

• Implementing Regulation (EU) No XX/2026, which identifies RRMs as the primary reporting channels for transaction, exposure and fundamental data. 
• Delegated Regulation (EU) No XX/2026, which establishes a detailed framework for how RRMs receive, validate and submit data records to ACER (including authorisation, monitoring, withdrawal and orderly substitution), supporting high data quality and robust market oversight. 

How to register as a reporting party?

​​​​​Since 2015, all entities wishing to operate as RRMs must apply via ACER’s RRM registration tool. If they comply with ACER’s requirements, reporting parties are successfully registered and authorised to start reporting.

​From November 2027, the current registration process will be replaced by an authorisation regime (under the Delegated Regulation).

Once registered/authorised, data reporting parties will be subject to supervision by ACER.

This involves continuously monitoring their activity and providing guidance to ensure that wholesale energy market data is reported accurately and promptly. To this end, ACER works closely with national regulatory authorities (NRAs) and other stakeholders, sharing reported data and coordinating with them to ensure market integrity and transparency across the EU.