ISIN

ISO TC 68 identifier for financial instruments, ubiquitous in post-trade processing and regulatory reporting.

Definition

An ISIN is built from a 2-letter country prefix (ISO 3166), a 9-character national NSIN, and a final check digit computed with the Luhn algorithm. It is assigned by National Numbering Agencies (ANNA).

Origin

Defined by ISO 6166 "Securities and related financial instruments — International securities identification numbering system (ISIN)", maintained by ISO TC 68/SC 8; operational governance is handled by ANNA.

Example in context

US0378331005 — Apple Inc.'s ISIN: "US" (country), "037833100" (CUSIP/NSIN), and "5" (Luhn check digit).

Related terms

• ISO 3166 — supplies the ISIN country prefix.
• ISO 10383 (MIC) — identifies the listing market.