SEDOL – A global reference dataset

The SEDOL Masterfile service provides customers with a comprehensive, global reference dataset.

SEDOL Masterfile

SEDOL Masterfile has been in operation for over 30 years, growing and evolving with the market. It currently provides information on over 100 million securities and financial instruments, covering all asset classes, and continues to grow.

Various organisations use SEDOL Masterfile to aid security identification in their business activities – for example, to assist with portfolio valuation, trade execution and processing price feeds, for reference data validation as a cross-reference to other identifiers and price validation. 

This unique, global security identifier increases STP efficiencies and decreases the costs of cross-border trade failure. The SEDOL Masterfile service addresses three major industry issues with securities identification:

  • Identification of individual securities and the markets that they are traded on – reducing millions in losses each year as a result of trading errors caused by inaccuracy in security identification.
  • Code allocation on a real time basis – The SEDOL Masterfile is hosted on a 24/7 web browser for real-time SEDOL search and creation functionality.
  • Reducing the need for multiple identifiers – with SEDOL coverage across all asset classes.

The London Stock Exchange has no affiliation with any third parties offering commercial services for assistance in obtaining or maintaining SEDOL codes. To avoid incurring unnecessary costs, we strongly recommend all market participants requiring a SEDOL code do so by contacting the Exchange directly.

SEDOL allocation requests may be submitted to By submitting your SEDOL code allocation request to the Exchange, you accept and agree to the “Disclaimer” below.


The Exchange shall conduct appropriate due diligence on any request for a SEDOL. The determination of whether a security is eligible for a SEDOL code and whether the SEDOL license holder has supplied appropriate documentation or evidence shall be made by the Exchange in its sole discretion and any such determination shall be final. The Exchange may, in its sole discretion and without notice, suspend or deactivate a SEDOL code(s). The Exchange shall have no liability in connection with a determination that a security is or is not eligible for a SEDOL code. The allocation of a SEDOL code(s) to a particular security/securities is not intended to be and should not be construed as an endorsement of such security/securities, or an opinion as to the legal validity of such security/securities.

By submitting a request for a SEDOL, the applicant: (a) warrants that it holds a valid SEDOL License with the Exchange; (b) warrants that all information supplied shall be true and correct in all material respects; and (c) acknowledges and agrees to this disclaimer.

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Alternatively you can contact our sales team at +44 (0)20 7797 3009.