Schedule 13D
Also known as: 13D · beneficial ownership 5 percent
DEFINITION
Any person or group that acquires more than 5% of a public company's voting class stock must file a 13D within 10 days (5 business days under SEC's 2024 amendments). It discloses the buyer, purchase financing, prior contacts, and — critically — purpose: whether they intend to influence control of the company. 13D filers must also disclose any subsequent material changes promptly.
WHY IT MATTERS FOR RETAIL INVESTORS
A 13D is the activist-investor flag. When Carl Icahn, Elliott, or a similar fund files one, the stock often moves sharply because the filing implies intent to push for change — board seats, M&A, capital returns. Read Item 4 ('purpose of transaction') carefully; vague language ('for investment purposes') can shift to specific demands in later amendments.
How to Read a Schedule 13D: The Activist Investor Filing →
Schedule 13D walkthrough — the SEC filing that signals activist intent. Item 4 Purpose decoding, amendment patterns, notable filers, and what retail investors should watch.
OFFICIAL SEC SOURCE
https://www.sec.gov/fast-answers/answerssched13htm.html ↗RELATED TERMS
See Schedule 13D in a real filing
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