• The SI Registry (SIR) Data Group was established in late 2017 to support the January 2018 implementation of MIFID II. It is a collaboration between the SmartStream RDU and a group of Approved Publication Arrangements (APAs), open to all SIs and APAs (seven have collaborated so far).
    The SIR has solved a common problem of SI data collection and dissemination allowing accurate post-trade reporting. It allows SIs to register the details of the financial instruments and asset classes for which they are providing services, in a single centralised register. The SI Registry offers a comprehensive and granular set of data across both equities and non-equities, providing much needed clarity to the market.
  • The core principles of the SIR are:
    • Maximise completeness and accuracy of data
    • Increase operational efficiencies
    • Minimise cost to those contributing and collecting data
    • Support the timing of the MIFID II regulatory requirements
    • Be an open solution to all APAs and SIs across Europe on equivalent terms


  • APAs can report reliably on behalf of their customers who trade report through them
  • SIs can advertise their services and receive the master data back free-of-charge
  • Trading counterparties can ensure that they trade report correctly
  • Buy-side firms can reduce regulatory compliance costs by ensuring that selected brokers offer the appropriate SI services

Want to submit your SI status to the SIR?

Please email TRADEcho@lseg.com 

Do you require SI Registry Data?

SI Registry data is available for subscription in two forms: daily updates from SIs or as an SI Registry Rest API Service.  SI Registry data is also available for redistribution by 3rd parties – please get in touch with the TRADEcho team for further information: TRADEcho@lseg.com