REMIT

The most significant overhaul in REMIT's history entered force on 29 April 2026, introducing a new 14-day transaction reporting window (replacing the prior one-month window), a new position-level exposure reporting obligation, and tightened standards for non-EU intermediaries with no transition relief. ACER published four compliance instruments on entry-into-force day; the first T+10 reporting Deadline landed on 12 May 2026. ACER's accompanying enforcement report showed 204 STORs (Suspicious Transaction and Order Reports) filed by national regulators in 2025, double the 2024 figure.

At ACER's 11 June 2026 annual workshop, the agency confirmed its cross-border investigatory and enforcement powers activate in H2 2026, the first time ACER will exercise direct sanctioning authority rather than referring cases to national regulators. The guidance consultation closed 12 June; the final rulebook is deferred to October, leaving roughly six months of binding obligation against interim text. Denmark's energy regulator issued a capacity-hoarding fine in parallel, a national curtain-raiser to ACER's own cross-border enforcement cycle.

On 22 June 2026, ACER announced two further structural changes effective after July: cross-border marginal-price limits expand from +/-EUR 15,000 to +/-EUR 99,999/MWh, removing the transitional cap on clearing extremes; and a REMIT transaction-reporting Annex consultation opens 16 July covering energy derivatives. The Danish capacity-hoarding fine is the confirmed national precedent heading into ACER's own cross-border activation in Q4 2026. Separately, the Gas Market Task Force's SWD(2026)147 (2 June) recommended legislative alignment between REMIT and MiFID to consolidate reporting for cross-commodity desks, adding a further legislative obligation to REMIT's expanding perimeter.

REMIT (Regulation on Wholesale Energy Market Integrity and Transparency) is the EU legal framework prohibiting insider trading and market manipulation in wholesale electricity and gas markets. First adopted in 2011, it was substantially revised in 2019 and again in 2024, with the latest amendments granting ACER direct cross-border investigatory and sanctioning authority for the first time. REMIT covers spot and derivative markets for electricity, natural gas, and LNG, and imposes mandatory reporting obligations on market participants via Registered Reporting Mechanisms (RRMs) and Inside Information Platforms (IIPs). It is enforced jointly by ACER and national energy regulators across all EU member states.