A SEC accession number is the unique EDGAR identifier assigned to a filing when it is accepted. It is one of the safest ways to reference a filing because company names, tickers, and people can change over time.
Accession numbers appear in SEC URLs and filing index pages. In The Insiders Post, they are used as durable filing identifiers for linking normalized rows back to the original SEC source.
- Use accession numbers to verify a filing against EDGAR.
- They are more stable than company names or page titles.
- A single accession number can contain multiple transaction rows.
- They help connect parsed XML, filing detail pages, and product records.