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