13F Filing Deadlines in 2026: The Full Calendar

The 2026 deadline calendar

The legal basis is Rule 13f-1: any institutional investment manager exercising discretion over $100 million or more in covered U.S. equities must file within 45 days of quarter end. The SEC's 13F FAQ covers the edge cases.

When filings actually land

Filers can submit any time inside the 45-day window, and a few do file early. In practice the volume is heavily back-loaded: the famous names and the bulk of the universe land in the final week, with a surge on deadline day itself. In our Q1 2026 ingest, 1,824 managers filed, disclosing 1.87 million positions worth $53.7 trillion, and the dataset only became complete after May 15. Practical consequences:

• Don't analyze consensus mid-window. Aggregates computed before the deadline mix two quarters. Our Q1 2026 consensus readout was built only after the window closed.
• Amendments keep trickling in afterward. Managers file 13F/A restatements for weeks. Position data needs amendment supersession, not just the original filing.
• The data is already 45 days stale on arrival. Quarter-end positions, disclosed a month and a half later. Treat 13Fs as a map of committed capital, not a real-time feed. Our guide to reading a 13F goes deeper.

The related deadlines worth knowing

The interplay matters: Form 4s and 13Ds tell you about a position within days, while the 13F confirms the full book a quarter later. 13F vs 13D vs 13G vs Form 4 breaks down what each form can and cannot reveal, and our insider cluster tracking shows the 2-day-lag side of the data.

Being ready when the window opens

If you trade or build around filing season, the workflow is: watch EDGAR from about a week before each deadline, ingest continuously through the surge, apply amendments, then compute deltas. Or skip the plumbing: Arkolith polls EDGAR continuously, amendment-corrects every filing, and serves position-level changes by API and MCP the same way at every deadline. The docs quickstart takes about two minutes, and the investors leaderboard shows the freshly filed quarter as it assembles.

Frequently asked questions about 13F deadlines

What happens if a manager misses the deadline?

Late filings happen and the SEC can pursue enforcement, but there is no automatic public flag. In the data, a missing fund simply has a stale latest quarter, which is one of the staleness checks we run continuously.

Can managers keep positions confidential?

Yes. The SEC can grant confidential treatment for certain positions (typically ongoing accumulation programs), which then appear in a later amendment. This is rare but real, and another reason amendment handling matters.

Do all hedge funds file 13Fs?

Only managers with $100M+ in covered U.S. equities. Funds below the threshold, or holding mostly non-covered assets (futures, FX, foreign listings), file nothing. Family offices may also be exempt.

When is the Q2 2026 13F data available?

The deadline is Friday, August 14, 2026. Expect the bulk of filings in the days right before it, and complete cross-sectional data shortly after.

This article explains public filing rules. It is not investment or legal advice.