What Is a 13F Filing? Requirements, Deadlines and How to Read It
A 13F filing reports an institutional manager's quarter-end holdings. Learn the $100 million test, the November 16, 2026 deadline and what the report leaves out.
What is a 13F filing?
A 13F filing is a quarterly SEC report of an institutional investment manager's holdings in qualifying securities at quarter end. It shows a dated snapshot of reportable positions, including shares and market values.
The rules and deadlines below were checked against SEC materials on October 16, 2026. The distinction that matters when reading them: a portfolio snapshot cannot tell you when the manager traded, what it paid or what it owns today.
13F filing requirements: who must file?
Under Rule 13f-1, the threshold is at least $100 million in qualifying Section 13(f) securities under investment discretion on the last trading day of any month during a calendar year. Total firm assets under management are not the test.
Crossing that threshold creates a reporting obligation for that year's December quarter and the following March, June and September quarters, even if qualifying holdings later fall below it. The SEC FAQ explains that qualifying managers include advisers and entities investing for themselves, including foreign managers. An individual managing only a personal account is excluded.
13F filing deadlines 2026: when is the next report due?
The next deadline is Monday, November 16, 2026, for holdings as of September 30, 2026, according to the SEC FAQ reviewed October 16.
The normal deadline is within 45 days after quarter end. For this quarter, the calendar date falls on a Saturday, so the deadline rolls forward. A manager can file any time before the deadline, so there is no fixed release date for any one fund. A September snapshot can therefore reach readers well into November, after the portfolio may have changed.
What does a 13F leave out?
The official securities list defines coverage. It mainly includes US exchange-traded equities, ETFs and closed-end funds, plus certain other securities and held options. Shares that trade only on foreign exchanges are absent, but eligible US-listed shares of foreign companies can appear.
Cash and securities outside that list are absent. Trades opened and closed within the quarter do not appear in the quarter-end snapshot. Confidential treatment can delay public disclosure of positions. The public filing is therefore an incomplete view of the manager's economic exposure.
The form instructions also distinguish stock from option entries. Reported option values describe the underlying securities, not the premium paid or maximum possible loss.
How do you read quarter-over-quarter changes?
Start with the report period, filing timestamp and amendment type. An amendment can restate a report or add previously undisclosed entries; adding a restatement to the original double-counts it.
Then compare the same manager, security class and put/call designation across quarters. Use comparable share counts to identify additions and reductions. A larger market value alone does not establish buying.
Check splits, spin-offs and reporting-entity changes before describing a trade. For position weights, state the denominator: reported holdings value is different from total firm AUM. Missing earlier holdings require investigation before they can be treated as zero.
Why is copying hedge funds harder than it looks?
An outside investor sees delayed, partial holdings without the full hedge, execution price or subsequent trades. Research reviewed October 16, 2026, including Systematic 13F Hedge Fund Alpha, finds results that depend on manager selection and implementation. It does not establish a universal copying strategy.
For the separate question of manager performance, see our hedge-fund reported returns guide.
Frequently asked questions
Does a 13F show short positions?
No. Under the SEC guidance reviewed October 16, 2026, short stock positions and written options are excluded, and shorts are not netted against reported long holdings.
Does a new holding mean a fund just bought it?
Not necessarily. A newly visible position may reflect a purchase, a corporate distribution or the end of confidential treatment. Check the earlier filing and any amendments before calling it a new purchase.
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Rules and deadlines reflect SEC materials checked October 16, 2026. This article is educational and is not investment advice.