What is a Legal Entity Identifier (LEI) and Why Was It Created?
An LEI is a 20-character alphanumeric code that uniquely identifies any legal entity participating in financial transactions globally. Think of it as a passport number for companies and institutions inside the financial system.
The system was created in direct response to the 2008 global financial crisis. During the collapse, regulators discovered they could not accurately identify who was holding what financial instruments, who owed money to whom, or how risk was distributed across the system. When Lehman Brothers failed, untangling the counterparty relationships took months because there was no universal entity identifier. The G20 mandated a global LEI system in 2012. GLEIF (the Global Legal Entity Identifier Foundation) was established to oversee it. Today, over 2.2 million entities in 200-plus countries hold active LEIs.
Who Needs an LEI Code?
Any legal entity that trades in regulated financial instruments. The specific requirement depends on which regime applies:
- MiFID II (EU): All firms trading in financial instruments must have an LEI. The rule is simple: no LEI, no trade.
- EMIR (EU): Required for all parties to derivative contracts reported to trade repositories.
- Dodd-Frank (US): Required for swap dealers and major swap participants reporting to CFTC data repositories.
- UK FCA, ASIC (Australia), MAS (Singapore): Equivalent requirements for derivatives and securities reporting.
Beyond formal mandates, many banks now require LEIs from corporate clients during KYC/KYB onboarding even where not technically required by regulation.
How to Read a 20-Character LEI Code
Every LEI follows ISO 17442. Take Goldman Sachs' LEI as an example: 784F5XWPLTWKTBV3E584
| Characters | Segment | Example | Meaning |
|---|---|---|---|
| 1 to 4 | LOU Prefix | 784F | Identifies the LEI issuer (Local Operating Unit) |
| 5 to 18 | Entity Identifier | 5XWPLTWKTBV3E5 | Unique alphanumeric ID for the entity |
| 19 to 20 | Check Digits | 84 | MOD-97-10 check digits per ISO 17442 |
The check digits let you verify an LEI is correctly formatted before submitting it to a trade repository. This tool validates them automatically using the MOD-97-10 algorithm.
LEI vs. SWIFT/BIC Code
These are frequently confused. They solve completely different problems and you often need both.
| Feature | LEI | SWIFT / BIC |
|---|---|---|
| Identifies | The legal entity itself | A bank branch for message routing |
| Format | 20 alphanumeric characters | 8 or 11 characters |
| Assigned by | GLEIF-accredited LOUs | SWIFT |
| Purpose | Regulatory reporting, KYC/KYB | Payment routing for wire transfers |
| One per entity? | Yes | No — multiple BICs per bank |
| Renewal required? | Annual | No expiry |
| Public database | GLEIF (gleif.org) | SWIFT (swift.com) |
GLEIF and SWIFT jointly maintain a BIC-to-LEI mapping that links institutions holding both identifiers. The BIC-to-LEI tab above uses this mapping.
LEI Status Codes Explained
- ISSUED (Active): Valid, verified, and usable for all regulatory reporting.
- LAPSED: Annual renewal was missed. Not valid for regulatory reporting. Must be renewed before transacting in regulated markets.
- MERGED: Entity merged into another. The LEI points to the successor entity.
- RETIRED: Entity no longer exists. LEI is permanently inactive.
- ANNULLED: Issued in error. Permanently invalidated by the issuing LOU.
How to Register for an LEI
Registration goes through any GLEIF-accredited Local Operating Unit. The process: submit your entity's legal information (registered name, company number, legal address), the LOU verifies against official registries (Companies House, SEC, CAC, etc.), and the LEI is issued within 1 to 3 business days. Annual renewal is required to stay at ISSUED status. Cost: roughly USD 50 to 150 per year.
Frequently Asked Questions
What is a Legal Entity Identifier (LEI)?
A 20-character alphanumeric code that uniquely identifies legal entities participating in financial markets globally. Required under MiFID II, EMIR, and Dodd-Frank for entities trading in regulated financial instruments.
Who needs an LEI code?
Any legal entity trading in regulated financial instruments: banks, investment firms, funds, and corporations involved in securities or derivatives transactions. Many financial institutions also require LEIs from corporate counterparties during KYC/KYB onboarding.
How do I find a company's LEI number?
Search by company name in this tool. Results come directly from the GLEIF API, which contains over 2.2 million active and historical LEI records. You can also search at gleif.org directly.
What does a lapsed LEI mean?
The entity failed to complete the required annual renewal. The LEI cannot be used for regulatory reporting. The entity likely still exists and operates, but must renew the LEI before transacting in regulated markets. Renewal typically takes 1 to 3 business days.
What is the difference between an LEI and a SWIFT code?
A SWIFT/BIC code identifies a bank branch for routing wire transfers. An LEI identifies the legal entity itself for regulatory reporting. One entity can have many SWIFT codes (one per branch), but only one LEI. Both are required, for different purposes.
How is an LEI linked to a SWIFT/BIC code?
GLEIF and SWIFT jointly maintain a BIC-to-LEI mapping database updated monthly. Financial institutions holding both a SWIFT/BIC code and an LEI are cross-referenced in this mapping. Use the BIC to LEI tab above to look this up.
How do I register for an LEI number?
Register through any GLEIF-accredited Local Operating Unit: RapidLEI, Bloomberg LEI, or LEI Worldwide. Submit your legal entity information, allow 1 to 3 business days for verification, and pay an annual fee of USD 50 to 150. Renewal required every year.
