13D vs 13G filing.
In plain English
Schedules 13D and 13G are the two filings an investor uses to disclose crossing the SEC's beneficial ownership threshold in a public company's voting shares. A 13D is the long form, required when the holder intends to influence control, and it asks for the purpose of the purchase, the source of funds, and any plans for the company. A 13G is the abbreviated form available to qualified institutions and to passive investors who do not seek control. A holder whose intentions change must switch from 13G to 13D, and that switch is itself a signal the market watches closely. Deadlines and amendment requirements differ between the two, and the current schedule comes from SEC rules.
01Why it matters
A 13D landing on a company you own often marks the start of a public fight over strategy, board seats, or a sale, and the price usually reacts the same day.
02The math, step by step
Say a fund accumulates shares quietly and files a 13G as a passive holder. Six months later it decides to push for two board seats. It must convert to a 13D, disclosing that intent, and the stock frequently moves on the filing alone before any proposal exists.
Illustrative example. The amounts here are hypothetical, chosen to show how the math works, not real quoted rates or figures.
03What this is NOT
It is not the quarterly portfolio report. A 13F lists a manager's covered U.S. equity positions after each quarter. A 13D or 13G is triggered by crossing an ownership threshold in one company and is filed promptly, with a 13D also stating what the holder plans to do.
04Receipts
Every figure on this page is sourced to a primary document. Tap to open the original.
Plain-English answers from our glossary. Receipts included. Never advice.
Educational tool. Answers come only from ClearMoneySchool's published glossary and are not advice. Why we never give advice