13D vs 13G: what the difference means
Both disclose a stake above 5%. A 13D means the holder intends to influence the company; a 13G means they are passive. Switching from 13G to 13D is a signal.
Anyone acquiring beneficial ownership of more than 5% of a class of a company’s voting shares must disclose it to the SEC. Which form they use tells you what they intend.
The difference in one line
Schedule 13D is for investors who may seek to influence or control the company. Schedule 13G is the short-form version for passive holders.
Schedule 13D — the activist filing
Filed by holders who do not qualify as passive. Deadline is five business days after crossing 5% (shortened from ten days by amendments effective 2024).
Item 4, Purpose of Transaction, is the whole document. This is where the filer states what they intend — board seats, a sale of the company, a strategic review, changes to capital allocation. It is a statement of intent filed under penalty of perjury, and activists use it as a public opening position.
Material changes require a prompt amendment (13D/A), so the amendment stream on a contested situation is a running account of the campaign.
Schedule 13G — the passive filing
Available to institutional investors, passive investors, and certain exempt holders who do not intend to influence control. Much shorter, and filed on a periodic schedule rather than promptly.
This is why index funds and large asset managers appear as 13G filers on thousands of companies. A 13G from a large passive manager is an ownership fact, not an event.
The signal worth watching
A holder switching from 13G to 13D.
It means an investor who previously certified they were passive has decided they are not. That switch is a public declaration that someone with a large position intends to do something — and it is filed before the campaign becomes news.
The reverse switch, 13D to 13G, usually means a campaign has ended.
What it does not tell you
Beneficial ownership includes shares the holder has the right to acquire within 60 days, so the reported percentage is not always shares presently held. Derivative positions can also give economic exposure without triggering the same disclosure. The filing is a floor on involvement, not a complete picture.
How to find them
Latest 13D filings on EDGAR · Latest 13G filings
Elsewhere
| Country | Threshold and form |
|---|---|
| United States | 5% — Schedule 13D or 13G |
| Canada | 10% — “early warning report” under NI 62-104, on SEDAR+; alternative monthly reporting for eligible institutions |
| United Kingdom | 3% — TR-1 notification under DTR 5, and again at every whole percentage point above |
The UK threshold being 3%, and stepping at every percentage point, means UK ownership disclosure is meaningfully more granular than the US regime.