Guide · Updated 2026-07-13
13F Filing Deadlines & Calendar
When are 13F filings due? The 45-day deadline explained, with the quarter-end dates and approximate filing deadlines for every reporting period.
13F filings follow a fixed calendar. Understanding it tells you exactly when fresh institutional holdings data becomes available — and why what you are reading is always at least several weeks old.
The 45-day rule
Managers must file Form 13F within 45 days after the end of each calendar quarter. The report reflects positions held on the last day of that quarter, so by the deadline the data is already up to 45 days stale — and often reflects trades made even earlier.
The four quarterly deadlines
| Quarter | Quarter-end | Filing deadline (approx.) | | --- | --- | --- | | Q1 | March 31 | May 15 | | Q2 | June 30 | August 14 | | Q3 | September 30 | November 14 | | Q4 | December 31 | February 14 |
When a deadline falls on a weekend or holiday, it rolls to the next business day. Most large funds file close to the deadline rather than early, so the bulk of each quarter's data lands in a concentrated window.
Why the calendar matters
Because filings cluster around these four dates, institutional-holdings interest spikes four times a year. The heaviest attention usually goes to the Q4 filing in mid-February, which captures year-end positioning, and the Q1 filing in mid-May.
Confidential treatment can delay disclosure
In limited cases, a manager can request confidential treatment to delay disclosing a specific position — for example, while it is still building a large stake. Those holdings appear later, once the SEC grants or the confidentiality lapses, which is why a fund's reported book can occasionally seem incomplete.
For the bigger picture on timing gaps, see our guide to the limitations of 13F data.
Frequently asked questions
- When are 13F filings due?
- 13F filings are due within 45 days after the end of each calendar quarter — approximately May 15, August 14, November 14 and February 14, rolling to the next business day when those dates fall on a weekend or holiday.
- How old is 13F data by the time it is public?
- Because managers have 45 days to file after quarter-end, the positions shown are at least several weeks old by the filing deadline and may reflect trades made even earlier in the quarter.
- Can a fund hide a position on its 13F?
- In limited cases a manager can request confidential treatment to temporarily delay disclosing a specific holding, such as while accumulating a large stake. The position is disclosed later once confidentiality lapses.