EU EMIR (the Regulation on OTC derivative transactions, central counterparties and trade repositories) (648/2012) imposes trade reporting requirements on parties to derivative transactions. Counterparties must report trade data to registered trade repositories. The rules affect all types of counterparties to trades in all classes of derivatives, irrespective of whether the parties are regulated or unregulated, and irrespective of whether the trades are executed on exchange or OTC. This note explains the trade reporting requirements and the procedures involved.