What is an SEC Form 13F?
Form 13F is the quarterly report in which investment managers that oversee $100 million or more list the US-listed stocks and some other securities they held on the last day of the quarter.
Last reviewed October 5, 2026
Who has to file one
Institutional investment managers, such as hedge funds, mutual fund companies, banks and pension managers, that have investment discretion over at least $100 million in the securities the SEC lists for this purpose. The rule comes from Section 13(f) of the Securities Exchange Act.
When it is filed
Within 45 days after the end of each calendar quarter. That means roughly mid-February, mid-May, mid-August and mid-November, so the picture is always at least a month and a half old.
What it shows
- Each position the manager held at the end of the quarter: the company, the type of share, the number of shares and their value
- Certain options and convertible bonds that relate to those stocks
What it does not show
- Short positions, most bonds, cash and shares of companies outside the US
- What the manager traded during the quarter, or when a position was bought
- Positions the manager asked the SEC to keep confidential for a time
How to read it
It is a snapshot of one day, published weeks later. A stock that appears can be part of a hedge, and a stock that disappears may have been sold at any point in the quarter. Comparing two quarters shows what changed, not why.
What OQRO does with it
OQRO compares each tracked fund's report with its previous one to show new, added, trimmed and closed positions, and adds up every filer's holdings in a company. Each figure links to the filing.
See it on OQRO
Sources
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This explains a public filing in plain words. It is not legal or investment advice.
