13F Filing Deadlines: When New Holdings Are Released
13F filings come out on a predictable schedule. Knowing the calendar tells you exactly when fresh superinvestor data will appear — and when to watch for the biggest portfolio moves of the year.
The 45-day rule
Institutional managers must file Form 13F-HR within 45 days of the end of each calendar quarter. That single rule sets the entire schedule, so the same four windows repeat every year.
The four filing windows
Q4 (quarter ending Dec 31) is reported by about February 14. Q1 (ending Mar 31) by about May 15. Q2 (ending Jun 30) by about August 14. Q3 (ending Sep 30) by about November 14. Dates shift by a day or two when a deadline lands on a weekend or holiday.
Why most filings land on the deadline
Managers generally file as late as the rules allow, to avoid tipping their hand while they're still trading around a position. As a result the bulk of filings — including Berkshire Hathaway's closely watched one — arrive in the final days of each window. Expect a flood of data, then a wave of headlines.
Don't miss the next batch
Superinvestor Tracker refreshes as new filings are ingested each quarter, and the email alert list notifies you when the investors you follow file. That way you see the biggest buys and sells as soon as they're public.