Every quarter, headlines about what the big funds bought appear within hours of the 13F filing deadline. By then, the trades they describe can be months old.
Form 13F is filed by managers with at least $100 million in qualifying securities. It shows their long holdings on the last day of each calendar quarter, and they have 45 days to file it. Holdings as of September 30, 2026 are due by November 16, 2026, so they are already 47 days old on arrival.
That snapshot stays the newest public view until the next quarter’s filing, due February 16, 2027. By then the September data is 139 days old. A manager could have sold everything in October and the filing would still list it.
The form also leaves things out. The SEC says managers must not report short positions or options they have written, and some positions can be filed confidentially. So a 13F tells you what a fund owned, not what it owns now or how it is hedged. There is a timeline and a table of the gaps in this explainer on why 13F data is out of date.
This post is general education, not financial advice.
