LEI Data LEI Mapping

Download ISIN-to-LEI Relationship Files



In April 2019, the Global Legal Entity Identifier Foundation (GLEIF) and the Association of National Numbering Agencies (ANNA) piloted the first daily open-source relationship files that link newly issued International Securities Identification Numbers (ISINs) and Legal Entity Identifiers (LEIs). ANNA is the registration authority for the ISIN.

The daily ISIN-to-LEI relationship files, which are publicly available on the GLEIF website, currently include new ISINs issued by early mover national numbering agencies (NNAs). It is expected that other NNAs will join the program going forward. Altogether, there are 116 NNAs responsible for issuing ISINs. Information on the participating NNAs is published on the ANNA website.

This cooperation between GLEIF and ANNA was created to improve the transparency of exposure by linking the issuer and issuance of securities. This enables firms to aggregate data which clearly shows their securities exposure in relation to an individual issuer and its related entities.

The ISIN is the recognized global standard for unique identification of financial instruments, e.g. securities. According to Wikipedia: “A security is a tradable financial asset. The term commonly refers to any form of financial instrument, but its legal definition varies by jurisdiction. In some jurisdictions the term specifically excludes financial instruments other than equities and fixed income instruments. In other jurisdictions, it includes some instruments that are close to equities and fixed income, e.g., equity warrants. In some countries and languages, the term ‘security’ is commonly used in day-to-day parlance to mean any form of financial instrument, even though the underlying legal and regulatory regime may not have such a broad definition.” The LEI connects to key reference information that enables clear and unique identification of legal entities participating in financial transactions, e.g. the issuers of securities.

In the longer term there are plans to enhance the ISIN-to-LEI mapping initiative to also cover legacy ISINs.

The ISIN-to-LEI relationship files are built upon a mapping process established by ANNA that is in the process of being certified by GLEIF. Each NNA that opts into the ISIN-to-LEI mapping initiative is permitted to - and should - use the certificate that will be issued to ANNA.

The free of charge GLEIF Certification of LEI Mapping service ensures that organizations which map the LEI to their own identifiers use state of the art methodologies and / or processes to do so accurately.


Relevant Files for Download