# SIC code

> The four-digit Standard Industrial Classification code the SEC assigns to each company. Listed's sectors are built from it.

Updated Oct 17, 2026.

The Standard Industrial Classification (SIC) code is a four-digit code for a company's main line of business. The SEC assigns one to each registrant and shows it on the company's EDGAR profile. Examples: `2834` pharmaceutical preparations, `6021` national commercial banks, `7372` prepackaged software.

## Limits

- The system dates from the 1930s and was last revised in 1987. Many modern businesses fit it awkwardly.
- A company gets one code, even if it does several things.
- Codes are not always updated when a company changes what it does.

## On Listed

Sector pages group companies by SIC code, because it is the classification the SEC itself provides. A company's code is shown on its page. If a company seems to be in the wrong sector, its SIC code is usually why.

## Related terms

- [CIK](/glossary/cik.md)
- [EDGAR](/glossary/edgar.md)
- [Filer category](/glossary/filer-category.md)

All terms: [/glossary.md](/glossary.md)