Schedule 13D is the SEC filing required of any investor who acquires beneficial ownership of more than 5% of a public company's outstanding voting shares and has an intent to influence control of the company. Under current SEC rules it must generally be filed within five business days of crossing the threshold.
Because it can signal activist intent, a new Schedule 13D is closely watched and often moves the target company's stock.
The filing must disclose the filer's identity and background, the source and amount of funds used for the purchase, and its purpose — including any plans relating to an extraordinary transaction, changes to the board or management, or other actions affecting control. A material change to the disclosed information requires a prompt amendment, generally within two business days. An investor who initially files passively on Schedule 13G but later develops control intentions must switch to Schedule 13D, and that transition is itself a signal. For the full comparison of the two filings, see the guide linked below.
A: Any investor who beneficially owns more than 5% of a company's outstanding voting shares and has an intent to influence control of the company must file a Schedule 13D, generally within five business days of crossing the threshold.
A: It discloses the filer's identity, the source of funds for the purchase, and the purpose of the acquisition, including any plans to affect control of the company such as board representation or a merger.
A: A Schedule 13D is filed by an investor with an intent to influence or control the company. A Schedule 13G is filed by a passive investor who has crossed the same 5% ownership threshold without such intent.
Further Reading: Schedule 13D vs. 13G: Activist or Passive Stake?
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