# Form 3

> An insider's first statement of what they own in the company, filed within 10 days of becoming an insider.

Updated Oct 17, 2026.

Form 3, "Initial Statement of Beneficial Ownership of Securities", is the first filing a new [insider](/glossary/insider) makes. It lists the company's securities they own, directly and indirectly, including options and other derivatives.

## When it is due

Within 10 days of becoming an insider: being appointed a director or officer, or crossing 10% ownership of a class of registered shares. When a company first registers its shares, as at an IPO, existing insiders file by the date the registration takes effect.

## Reading it

A Form 3 is a starting point, not a transaction. It shows no purchase or sale, so Listed does not list it among insider trades. It explains holdings that later [Form 4](/glossary/form-4) filings change.

## Related terms

- [Form 4](/glossary/form-4.md)
- [Form 5](/glossary/form-5.md)
- [Insider](/glossary/insider.md)

## Guides that use it

- [Insider trades: what Form 4 tells you](/guides/insider-trades-what-form-4-tells-you.md)

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