What is a Form 3 filing? (SEC insider)
What is a Form 3 filing? It is the first disclosure a company insider files with the US Securities and Exchange Commission (SEC), reporting the securities they already hold at the moment they become an insider. A Form 3 filing is required under Section 16 of the Securities Exchange Act when someone becomes a director, an officer, or the beneficial owner of more than 10% of a class of a company's equity. It sets the baseline: what the insider owned on day one, before any subsequent trade. Source: SEC.
Definition
A Form 3 filing
is the initial SEC statement of beneficial ownership filed under Section 16 when a person first becomes a company insider, such as a director, officer, or over-10% owner. It reports their starting holdings and is due within 10 days of becoming an insider. Source: SEC.
When must a Form 3 be filed?
The clock starts the moment a person becomes an insider. A director or officer files on appointment; a large holder files on crossing the 10% threshold. Either way, the filing is due promptly.
10 days
Deadline to file a Form 3 after becoming a company insider
Source: SEC, Section 16 rules
The Form 3 must reach the SEC within 10 days of the triggering event. It is filed electronically on EDGAR and is public from the moment it posts. Source: SEC, Section 16 rules.
How is a Form 3 different from Form 4 and Form 5?
The three Section 16 forms cover different moments in an insider's ownership. A Form 3 is the baseline; the others track what happens next.
- Form 3 reports the starting position, within 10 days of becoming an insider.
- Form 4 reports each change in ownership, within 2 business days of the transaction.
- Form 5 is an annual catch-up for transactions not already reported, due within 45 days of the fiscal year-end.
For the side-by-side, see Form 3 vs Form 4 vs Form 5.
Where do you read a Form 3?
Every Section 16 filing, including Form 3, is public on SEC EDGAR, searchable by company or by insider, and stamped with its filing date. For the ongoing trades that follow the baseline, see how to track insider buying.
So a Form 3 filing is the opening entry in an insider's public ownership record, not a signal about the stock. Flock reads SEC insider filings and keeps each one dated and linked to EDGAR. What any of it means for your own decision is your call to make.
Frequently asked questions
What is a Form 3 filing?
A Form 3 is the initial SEC statement of beneficial ownership filed under Section 16 when a person first becomes a company insider, such as a director, officer, or holder of more than 10% of a class of shares. It reports their starting holdings. Source: SEC.
When must a Form 3 be filed?
A Form 3 must be filed within 10 days of the event that makes the person an insider, for example being appointed a director or officer or crossing the 10% ownership threshold. Source: SEC, Section 16 rules.
How is a Form 3 different from a Form 4?
A Form 3 reports an insider's starting position when they first become an insider. A Form 4 reports later changes in that position, and is due within 2 business days of a transaction. Source: SEC.
Where can I read Form 3 filings?
All Section 16 filings, including Form 3, are public on the SEC EDGAR system, filed electronically and searchable by company or insider. Each carries a filing date. Source: SEC EDGAR.
Flock tracks these filings, sourced, dated, and linked back to the original. See what smart-money entities disclosed, without the guesswork about what it means.
Disclosures shown are public regulatory filings. Data may be delayed or incomplete. Smart-money entities may no longer hold positions shown. Not investment advice.