ISIN (International securities identification number) · Concepts

Roles that need it

Security masterA security master is the central database of reference data on financial instruments: identifiers (such as the International Securities Identification Number, ISIN), issuer, currency, coupon, maturity, asset class and corporate action terms. Downstream systems for trading, settlement, accounting and reporting take their instrument data from it, so errors spread widely.
UPI (Unique product identifier)The unique product identifier (UPI) is a code defined by ISO 4914 that identifies an over-the-counter derivative product type and its reference data, such as asset class, instrument type and underlier. It is issued by the Derivatives Service Bureau and is required in reporting under the European Market Infrastructure Regulation (EMIR).
MiFIR transaction reportingMiFIR transaction reporting is the duty of investment firms, under Article 26 of the Markets in Financial Instruments Regulation, to report each transaction in reportable instruments to their national authority by the end of the next working day. Reports identify the instrument by ISIN, the parties by legal entity identifier (LEI) or national ID, and the decision maker and trader.
Share classA share class is a category of units in the same fund portfolio that differs in features such as fees, currency, minimum investment, distribution policy (accumulating or distributing) or hedging. Each class has its own net asset value per unit and its own identifier (ISIN).

Updated 31 Oct 2026.