ISDA, GFMA, and FIA joint letter to the European Commission’s Environment Directorate-General (DG) to voice concerns regarding the reporting regime under the Regulation on Wholesale Energy Market Integrity and Transparency (1227/2011) (REMIT). Key concerns include market participant identification, reporting of transactions, back-loading of reports, consistency with guidance on reporting under EMIR and MiFIR, and timeframe for implementation.