13F Filing Deadlines: When Institutional Holdings Data Is Released

If you follow institutional investors through 13F filings, knowing when data becomes available is just as important as knowing how to read it. 13F filings follow a predictable quarterly calendar, and understanding these deadlines helps you plan your research so you’re ready to analyze new holdings the moment they appear.

This guide covers the exact filing deadlines for each quarter, when to expect data, and how early and late filers affect your research timeline. For a broader overview of filing season dynamics, see our filing season guide.

The 13F Filing Calendar

Every institutional investment manager with at least $100 million in qualifying assets must file Form 13F within 45 calendar days of the end of each calendar quarter. The four reporting periods and their deadlines are:

Q1 (January 1 – March 31): Filing deadline — May 15
Q2 (April 1 – June 30): Filing deadline — August 14
Q3 (July 1 – September 30): Filing deadline — November 14
Q4 (October 1 – December 31): Filing deadline — February 14

When a deadline falls on a weekend or federal holiday, the due date shifts to the next business day. For example, if February 14 is a Saturday, filings are due the following Monday, February 16.

What Exactly Gets Reported

Each 13F filing is a snapshot of the manager’s long equity holdings as of the last day of the quarter. The filing reports:

Security name and CUSIP identifier
Number of shares held
Market value of each position
Type of investment authority (sole, shared, or defined)

The data represents positions on the quarter-end date, not during the quarter. A manager could have bought and sold a stock within the quarter and it would never appear in the filing if they didn’t hold it on the last day.

When Data Actually Becomes Available

While the deadline is 45 days after quarter-end, filings start arriving much earlier. Here’s a typical timeline:

Weeks 1–2 After Quarter-End (Days 1–14)

A small number of early filers submit within the first two weeks. These tend to be smaller funds, quantitative shops, or firms with automated filing processes. The data is public immediately on EDGAR and appears on 13F Insight shortly after.

Weeks 3–4 (Days 15–30)

Filing volume picks up significantly. Many mid-size managers and some large firms file during this window. This is when you start seeing meaningful signals from well-known filers.

Weeks 5–6 (Days 31–45)

The majority of large institutional managers file in the final two weeks before the deadline. Major names like Berkshire Hathaway, Vanguard, and other household-name funds often file close to the deadline.

After the Deadline

Some filers submit late. Late filings are still accepted and made public, but they may indicate operational issues or complexity in the fund’s reporting process. A few filers consistently file days or even weeks past the deadline.

The Amendment Window

After submitting a 13F, filers can file amendments to correct errors. There are two types:

13F-HR/A (Amendment): Replaces the entire original filing with corrected data. This is the most common type of amendment.
13F-NT (Notice): A notice filed when the manager cannot submit their full 13F on time, requesting a deadline extension.

Amendments can arrive weeks or even months after the original filing. On 13F Insight, amendments automatically supersede the original filing — you always see the most current data. But if you’re researching historical patterns, be aware that the holdings you see today might differ from what was originally reported.

How to Plan Your Research Around Filing Season

Strategic timing makes your 13F research more efficient:

Set calendar reminders. Mark the four deadlines (Feb 14, May 15, Aug 14, Nov 14) in your calendar. Start checking for new filings 2–3 weeks before each deadline.
Prioritize early filers for speed. If you want the earliest possible signals, focus on filers who consistently file early. Their data is less likely to move markets because fewer people are watching at that point.
Wait for the deadline for completeness. If you want a comprehensive view of institutional positioning, wait until a few days after the deadline when most filings are in. This gives you the full picture for tracking buying and selling patterns.
Use watchlists to stay focused. Rather than sifting through thousands of new filings, let your watchlist surface the filers and stocks you care about most.
Check for amendments a month later. Revisit key holdings data 4–6 weeks after the deadline to see if any amendments changed the picture.

Early Filers vs. Late Filers: What It Means

Filing timing itself can be a data point:

Consistently early filers tend to have well-organized operations and straightforward portfolios. Their data is reliable and quickly available.
Last-minute filers often have more complex portfolios with many positions, derivatives, or international holdings that require more time to compile.
Late filers (past the deadline) may be dealing with operational challenges, portfolio transitions, or compliance issues. Consistent lateness can be a yellow flag about fund operations.

The 45-Day Delay: What It Means for Investors

The most important thing to understand about 13F data is the built-in delay. When you see a filing on May 15, the positions it reports are from March 31 — already 45 days old. The fund may have significantly changed its portfolio since then.

This means 13F data is best used for:

Identifying long-term trends: Multi-quarter accumulation or distribution patterns that aren’t affected by a few weeks of delay.
Understanding fund strategy: Seeing sector allocations, position sizing, and portfolio concentration to understand a manager’s approach.
Research starting points: Discovering stocks that professional managers find interesting, then doing your own current-price analysis.

It’s not well-suited for short-term trading signals or momentum strategies where a 45-day delay would render the data stale.

2026 Filing Deadline Calendar

For quick reference, here are the 2026 13F filing deadlines:

Q4 2025 data: Due February 14, 2026 (Saturday → Due Monday, February 16)
Q1 2026 data: Due May 15, 2026 (Friday)
Q2 2026 data: Due August 14, 2026 (Friday)
Q3 2026 data: Due November 14, 2026 (Saturday → Due Monday, November 16)

Common Misconceptions

1. “All 13F data comes out on the same day”

No. Filings trickle in over a 6-week period. The deadline is the last day to file, not the day everyone files. Some managers submit within a week of quarter-end; others wait until the final hours.

2. “If a filing is late, the data is wrong”

Late filings are still valid. The SEC may send notices to late filers, but the reported holdings data is typically accurate. Lateness usually reflects operational delays, not data quality issues.

3. “13F data shows what the fund holds right now”

It shows what the fund held on the last day of the reporting quarter. By the time you read it, the positions could have changed significantly. Always pair 13F analysis with current market data.

Frequently Asked Questions

When is the next 13F filing deadline?

13F deadlines are 45 days after each calendar quarter: February 14, May 15, August 14, and November 14. Check the 2026 calendar above for exact dates, accounting for weekend adjustments.

Can I see 13F data before the filing deadline?

Yes. Many filers submit well before the deadline. You can check 13F Insight for new filings as they come in — there’s no need to wait for the deadline date. Early filers often submit 2–4 weeks after quarter-end.

How long after the deadline should I wait before analyzing data?

For a comprehensive view, wait 3–5 business days after the deadline. Most major filers will have submitted by then. For amendment completeness, check again 4–6 weeks later to catch any corrections.

Do all institutional investors file on the same schedule?

All managers subject to 13F reporting follow the same quarterly deadlines. However, some may file a 13F-NT (notice of late filing) to request an extension. The reporting periods (calendar quarters) are the same for everyone.

What happens if I miss a filing season?

All 13F data remains permanently available on EDGAR and 13F Insight. You can review any past quarter’s filings at any time. Check our historical holdings guide to learn how to access and compare data across multiple quarters.