In summer 2024, Southeast Europe experienced a sustained period of electricity price spikes. This report analyses the main drivers behind it and lays out measures to increase cross-zonal capacity and system flexibility in the region to mitigate their reoccurrence in the future.

This ACER LNG report reviews key market trends in 2025 and the implications for Europe’s energy security, including the risks linked to tensions in the Middle East.

This report analyses the preparedness of persons professionally arranging transactions (PPATs) to detect and report suspicious behaviour. PPATs are trading intermediaries such as energy exchanges, organised market places (OMPs) or brokers, who arrange or facilitate transactions in wholesale energy products.

This report focuses on national regulatory authorities’ (NRAs’) analysis of suspicious transaction and order reports (STORs) submitted by PPATs, their enforcement actions and penalties.

This report provides an overview of European gas wholesale markets trends during the winter season, covering the period from October 2025 to March 2026. It also explores the evolving impact of the Middle East conflict on European gas markets.

This report assesses whether the proposed reference price methodology for Latvia complies with the requirements of the EU binding Network Code on Harmonised Transmission Tariff Structures.

This report outlines key developments in European energy markets in 2025, with a focus on the evolving interaction between gas and electricity. It sets out ACER’s recommendations to step up energy market integration efforts to support decarbonisation, energy security and competitiveness goals.

This report assesses whether the proposed reference price methodology for Denmark complies with the requirements of the EU binding Network Code on Harmonised Transmission Tariff Structures.

ACER's programming document outlines the Agency's strategic goals and priorities for the coming years, including its 2026 work programme.

ACER publishes its report on the implementation of the inter-transmission system operators compensation mechanism (ITC) for 2024.