About a-team Marketing Services
The knowledge platform for the financial technology industry

A-Team Insight Blogs

Release of ISIN-to-LEI Relationship Files on GLEIF Website Meets Mixed Response

Subscribe to our newsletter

The release of mapping between International Securities Identification Numbers (ISINs) and Legal Entity Identifiers (LEIs) by the Association of National Numbering Agencies’ (ANNA) and the Global LEI Foundation (GLEIF) has received a positive industry response, but also raised questions about why a significant number of National Numbering Agencies within ANNA have not yet opted into the initiative.

The GLEIF initially talked about plans to map ISINs and BIC codes to LEIs to enhance their use back in April 2017. Swift and the GLEIF fulfilled their plans to deliver a BIC-to-LEI relationship file in early 2018. An ISIN-to-LEI relationship file was introduced late last week with the aim of improving transparency of exposure by linking the legal issuing entity to its issuance of securities, and addressing some of the regulatory requirements under the Prospective Directive, Central Securities Depositories Regulation (CSDR) and Securities Financing Transactions Regulation (SFTR).

ANNA and the GLEIF have been working on the technical development of mapping ISINs to corresponding LEIs over the past nine months, an exercise that has brought together two ISO standards – ISIN ISO 6166 and LEI ISO 17442 – and provides a consolidated view of ISIN-to-LEI links provided by National Numbering Agencies (NNAs) to the ANNA Service Bureau and on to the GLEIF. The published ISIN-to-LEI mapping is freely available to all on the GLEIF website.

Audience members of a webinar on data standards and global identifiers hosted by A-Team Group this week noted that ISIN-to-LEI mapping is a real value add for data management practitioners. They also questioned why only a limited number of NNAs are currently taking part in the initiative. According to ANNA and the GLEIF, 11 NNAs opted in from the start, with others expected to follow in coming months.

Subscribe to our newsletter

Related content

WEBINAR

Recorded Webinar: The ROI of Data Trust: Quantifying the Business Value of Data Observability

Data is the fuel that keeps modern financial institutions’ motors running but if that data can’t be trusted then the decisions made based upon it, or the uses to which its put, will be compromised. That’s especially important for data that’s fed into artificial intelligence models. If the data isn’t clean, accurate and complete, then...

BLOG

Finbourne Puts Even More Humans in the Loop to Build Client Confidence and Business

In an age when many firms are handing over ever more functions to artificial intelligence, Finbourne Technology is going all-out with investment in human engineers to take the company’s investment management data and technology capabilities to its customers. Finbourne has launched the Forward Deployment Engineering (FDE) programme in which it created a team of 30...

EVENT

RegTech Summit New York

Now in its 10th year, the RegTech Summit in New York will bring together the RegTech ecosystem to explore how the North American capital markets financial industry can leverage technology to drive innovation, cut costs and support regulatory change.

GUIDE

Regulatory Data Handbook 2026 – Fourteenth Edition

Welcome to the fourteenth edition of A-Team Group’s Regulatory Data Handbook. Supervisors increasingly expect firms to demonstrate which rules apply, which data supports each obligation, who owns the control and how exceptions are identified and resolved. Policies and implementation programmes must now be supported by records that can withstand regulatory scrutiny. This edition examines material...