ISIN-LEI Linkage


ISIN to LEI Mapping Initiative

On 4th April 2019, ANNA and the Global Legal Entity Identifier Foundation (GLEIF) launched a new initiative to link International Securities Identification Numbers (ISINs) and Legal Entity Identifiers (LEIs). The initiative has been created to help improve transparency of exposure by linking the issuer and issuance of securities.

This global project will map new and legacy ISINs to their corresponding LEIs, of those NNAs who have joined the initiative. By linking the two ISO standards together, firms will be able to aggregate the data required to gain a clear view of their securities exposure within a given issuer and its related entities. The ISIN-to-LEI mapping table is freely available to all without restriction on both the GLEIF and ANNA websites.

As the registration authority for the ISIN, ANNA has been responsible for evolving and promoting the ISIN standard through its work and collaboration with members, regulators and the industry at large. As a result, today ISINs are issued in more than 200 jurisdictions worldwide, enabling global cross-border trading and improved transparency. This initiative underlines ANNA’s commitment and mission to promoting the use of standards, including the two ISO standards used in this initiative: ISIN (ISO 6166) and LEI (ISO 17442).

Access to the ISIN to LEI Mapping files are available on the GLEIF Website:

The following NNAs have joined the ISIN to LEI Mapping initiative* –

Austria                 Oesterreichische Kontrollbank Aktiengesellschaft (OeKB)

Belgium               SIX Financial Information Belgium S.A./N.V.

Germany             WM Datenservice

Iceland                Nasdaq CSD Iceland hf

Italy                     Banca d´Italia

Japan                   Tokyo Stock Exchange

Malta                   Malta Stock Exchange PLC

Nigeria                Central Securities Clearing System Plc.

Poland                 Central Securities Depository of Poland (KDPW SA)

Slovenia              KDD Central Securities Clearing Corporation

Spain                   Comisión Nacional del Mercado de Valores (CNMV)

Sweden                Euroclear Sweden AB

Switzerland         SIX Financial Information Ltd

Turkey                 Istanbul Takas ve Saklama Bankası A.S.- Takasbank – NEW as of November 14, 2019

United Kingdom  London Stock Exchange

USA                      CUSIP Global Services

In addition to the jurisdictions outlined above also ISIN-LEI-Links are provided for Jersey, Guernsey, Isle of Man and Liechtenstein.

*The list of NNAs will continue to be updated as and when NNAs join the initiative.