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.

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

This report covers Regional Coordination Centres' self-reporting efforts in 2024 and, for the first time, more detailed information on 4 tasks requested by ACER.

This report looks at the latest developments in the hydrogen sector and highlights the main regulatory and market challenges for the EU.