Definition

Accession number

EDGAR's unique identifier for a single submission — the filing's fingerprint. Every figure Echelon displays cites one, because a number without its accession cannot be traced to the exact document that filed it. Amendments receive a new accession; the trail records versions, it never overwrites them.

Formula

Accession = filer prefix + filing year + submission sequence

Drivers — what actually moves it

Provenance: the accession pins a figure to one immutable submission — the citation that makes a number checkable.
Versioning: an amended filing (10-K/A) gets its own accession, so original and correction both stay on the record.

Where it comes from

Not a filing concept — EDGAR's own identifier for the submission that contains the filing. Stamped on every EDGAR filing index (formatted ##########-##-######). Echelon prints it beneath every figure so any number can be traced to its exact source document.

Form 10-K Form 8-K

Educational use only — not investment advice. Figures come from public SEC filings; Echelon teaches you to analyze data, it never recommends buying or selling any security.