13F Filing Deadline: The 45-Day Rule Explained (2026 Dates, EDGAR Traps, and First-Filer Rules)

Form 13F is due 45 calendar days after the close of each calendar quarter. That single rule sounds simple. In practice, it produces adjusted dates, a 5:30 p.m. EDGAR cut-off that catches filers off guard, no extension mechanism whatsoever, and a new parallel obligation under Form SHO that most deadline articles still treat as a footnote. This article explains the rule from the ground up, with the exact 2026 dates and the traps that trip up even experienced compliance teams.

Key takeaway: The 13F filing deadline 45 days after quarter end is a hard statutory deadline with no grace period, no Form 12b-25 equivalent, and an EDGAR cut-off of 5:30 p.m. ET, not 10:00 p.m. Miss it, and you are filing late.

What Is the 13F Filing Deadline and How Does the 45-Day Rule Work?

The statutory deadline for Form 13F is 45 calendar days after the last day of each calendar quarter, as set by Section 13(f) of the Securities Exchange Act of 1934 and confirmed in the SEC Division of Investment Management's FAQ.

The four quarter-end dates are fixed: March 31, June 30, September 30, and December 31. Add 45 calendar days to each, and you get the nominal deadline. Calendar days means exactly that: weekends and holidays count in the tally, but if the 45th day itself falls on a weekend or federal holiday, the deadline rolls forward to the next business day.

Here is the arithmetic for 2026:

Two of the four 2026 dates trigger the roll-forward. The SEC's own FAQ makes the February date explicit: "the deadline for the December 31, 2025 Form 13F report will be no later than February 14, 2026, a Saturday," which means the actual filing deadline is Monday, February 17. The November 16 adjustment is confirmed by the SecureXFilings deadline calendar, which shows "13-F: Due Monday, November 16, 2026 for Calendar Quarter ended 09/30/26."

If your compliance calendar still shows February 14 or November 14, fix it now.

Who Must File Form 13F?

Any institutional investment manager exercising investment discretion over $100 million or more in Section 13(f) securities must file, under Section 13(f)(1) of the Securities Exchange Act. Three details here matter more than most articles acknowledge.

The $100 Million Threshold Applies to Section 13(f) Securities, Not Total AUM

This is the most common misread. The threshold covers only exchange-traded equities, certain equity options and warrants, shares of closed-end investment companies, and certain convertible debt securities that appear on the SEC's Official List of Section 13(f) Securities. Open-end mutual funds are excluded. A manager with $300 million in total AUM but only $90 million in Section 13(f) securities does not file.

The threshold is also measured differently than most managers expect: it is the aggregate fair market value on the last trading day of any month of any calendar year. Crossing $100 million in a single month, even briefly, triggers the filing obligation for the entire following calendar year. Managers near the line should monitor monthly, not quarterly.

Foreign Managers Are Not Exempt

If a non-U.S. asset manager uses any means or instrumentality of U.S. interstate commerce and exercises investment discretion over $100 million or more in Section 13(f) securities, it must file. The SEC FAQ cites Release No. 34-14852 (June 15, 1978) for this position. The "interstate commerce" standard is broad: using U.S. mail, telephone, or electronic communications in the course of business is enough. Many non-U.S. managers with U.S. equity exposure assume they are exempt because they are not SEC-registered investment advisers. They are not exempt.

Governmental Entities File Too

Municipal pension funds, sovereign wealth funds, and other government-related entities are institutional investment managers for 13F purposes. The SEC FAQ is explicit: "person" for 13F purposes includes "a natural person, company, government, or political subdivision, agency, or instrumentality of a government," citing Release No. 15292 (Nov. 2, 1978).

When Does the First Filing Obligation Arise for a New Filer?

A first-time filer's initial Form 13F is due within 45 days after December 31 of the calendar year in which the $100 million threshold is first crossed, not the quarter in which it is crossed. This is one of the most consistently misunderstood rules in 13F compliance.

A worked example: if a manager's Section 13(f) securities first reach $100 million on the last trading day of June 2026, no filing is due for Q2 or Q3 2026. The first filing covers Q4 2026 and is due by February 14, 2027 (or the next business day if that falls on a weekend). The manager then files for Q1, Q2, and Q3 2027, four filings total, even if assets drop back below $100 million in the interim.

The SEC FAQ confirms this rule and it is not intuitive. Newly obligated managers often assume they must file for the quarter in which they crossed the threshold. They do not.

The EDGAR 5:30 p.m. ET Cut-Off: The Trap Most Filers Miss

EDGAR accepts filings from 6:00 a.m. to 10:00 p.m. ET on weekdays, but filings submitted after 5:30 p.m. ET receive the next business day's filing date. That means a Form 13F submitted at 5:45 p.m. on August 14 is technically filed on August 17 and is late.

This rule is confirmed by the EDGAR filer guidance. The exceptions to the 5:30 p.m. rule are Schedules 13D and 13G, Section 16 filings, and Rule 462(b) registration statements, which receive the actual submission date regardless of time. Form 13F is not among those exceptions.

The practical implication: build your internal deadline around 5:00 p.m. ET, not 10:00 p.m. That buffer absorbs last-minute EDGAR system issues, reviewer sign-offs, and the XML submission errors that only surface when you are rushing. For the August 14, 2026 deadline specifically, note that the SEC announced on June 1, 2026 that the June 2026 EDGAR release was cancelled; monitor the EDGAR submissions page for any system notices ahead of that date.

Is There Any Extension Available for Form 13F?

No. There is no formal extension mechanism for Form 13F. This surprises many compliance teams who are accustomed to Form 12b-25, which gives 10-Q filers up to five additional days and 10-K filers up to 15 additional days by filing a notice of late filing. That mechanism does not apply to Form 13F, as confirmed by SecureXFilings' deadline guidance.

If you miss the deadline, the SEC's direction is to file as soon as possible rather than wait for the next quarter. Voluntary disclosure and cooperation can meaningfully reduce enforcement exposure. In a September 2024 sweep, the SEC charged 11 institutional investment managers for failing to file, with penalties ranging from $175,000 to $725,000 and a total of over $3.4 million. Two firms in the same sweep paid zero penalties by self-reporting and cooperating. That outcome is not guaranteed, but it demonstrates that proactive disclosure is the right move.

Key takeaway: There is no Form 13F equivalent of Form 12b-25. If you realize on the deadline day that you will miss the 5:30 p.m. EDGAR cut-off, file as soon as possible after the deadline and consider contacting the SEC proactively. Waiting compounds the problem.

What Changed With the June 2022 Form 13F Amendments?

The SEC adopted rule and form amendments on June 23, 2022 (Release No. 34-95148), effective January 3, 2023. The 45-day deadline itself did not change. What did change:

• Dollar rounding: Values must now be rounded to the nearest dollar, not the nearest $1,000. Filers using old spreadsheet templates or third-party systems that still round to thousands are producing non-compliant filings.
• New identifiers: CRD number and SEC file number must be reported if the manager has them.
• FIGI option: Managers may now report a Financial Instrument Global Identifier (FIGI) alongside, but not instead of, the CUSIP number.
• Confidential treatment requests: As of February 28, 2023, all confidential treatment requests must be filed electronically on EDGAR. Paper submissions are no longer accepted. A checkbox was added to the Summary Page to flag when confidential treatment is being requested.

Filers still using legacy paper processes for confidential treatment requests are non-compliant. The electronic filing requirement has been in effect for over two years.

What Is Form SHO and Does It Affect My 13F Deadline?

Form SHO under Rule 13f-2 is a separate short-sale transparency obligation that runs alongside Form 13F, with its own monthly 14-calendar-day deadline. Not all 13F filers are also Form SHO filers; it applies to institutional investment managers that meet or exceed certain short-position thresholds.

The rule had a complicated launch. Rule 13f-2 was originally set to take effect January 2, 2025, with initial Form SHO filings due February 14, 2025. In February 2025, the SEC granted a temporary exemption because the technical standards for compliance were only released on December 16, 2024, immediately before the holidays. As SEC Acting Chairman Mark Uyeda stated at the time:

"This exemption gives filers more time to implement the technical updates required for compliance according to standards that were released only on Dec. 16, 2024, immediately prior to the holidays. Regardless of this exemption, abusive naked short selling as part of a manipulative scheme remains unlawful." -- SEC Acting Chairman Mark Uyeda, SEC Press Release, February 7, 2025

The exemption was not a repeal. The first Form SHO deadline was pushed to February 17, 2026, covering the January 2026 reporting period. That date was also the Form 13F Q4 2025 deadline, meaning managers subject to both obligations had two separate EDGAR submissions due on the same day.

Form SHO's monthly cadence (14 calendar days after each month-end) is more frequent than Form 13F's quarterly cadence. Skadden has noted that "industry participants have highlighted certain ambiguities and compliance questions regarding the scope of Rule 13f-2." If you have significant short positions, get legal counsel on whether you are in scope before assuming you are not.

EDGAR Filing Format: XML Is Not Optional

Since May 20, 2013, the text-based ASCII format for 13F filings has been discontinued. Filers must either use the online EDGAR form and construct the Information Table according to the EDGAR XML Technical Specification, or construct the entire filing in that XML format. Common XML errors that cause rejected submissions include malformed tags, CUSIP mismatches, and incorrect rounding. Most filers use a third-party filing agent to handle XML construction and EDGAR submission, which is the practical way to absorb that technical risk.

2026 Form 13F Deadline Summary

For the full 2026 SEC filing calendar across all form types, see SEC Filing Deadlines 2026: Complete Calendar by Filer Type. For the specific date-by-date breakdown of all four 13F deadlines including Form SHO collision details, see 13F Filing Deadlines 2026: Every Date, Rule, and Trap.

FAQ

What is the deadline for a 13F filing?

Form 13F must be filed within 45 calendar days after the end of each calendar quarter (March 31, June 30, September 30, December 31). When the 45th day falls on a weekend or federal holiday, the deadline rolls to the next business day. The four 2026 deadlines are February 17, May 15, August 14, and November 16.

When must Form 13F be filed for the first time by a new filer?

A manager that first crosses the $100 million Section 13(f) securities threshold during a calendar year must file its initial Form 13F within 45 days after December 31 of that year, regardless of which quarter the threshold was crossed. The first filing covers Q4 of the threshold year, not the quarter in which the threshold was first met.

How delayed are 13F filings?

The statutory delay is up to 45 calendar days after quarter-end. Many managers file close to the deadline, meaning the public sees holdings data that is 45 to 90 days old by the time it is released. There is no provision for additional delay beyond the 45-day window; there is no extension mechanism for Form 13F.

Does the $100 million threshold apply to total AUM?

No. The threshold applies specifically to Section 13(f) securities: exchange-traded equities, certain equity options and warrants, shares of closed-end investment companies, and certain convertible debt securities. Open-end mutual funds are excluded. A manager with $300 million total AUM but only $90 million in Section 13(f) securities is not required to file.

What is the penalty for a late Form 13F filing?

There is no formal grace period. Late filers face SEC examination risk and potential enforcement action. In a September 2024 sweep, the SEC levied penalties ranging from $175,000 to $725,000 against 11 managers for failing to file. Two firms that self-reported paid no penalty. File as soon as possible after a missed deadline and consider voluntary disclosure.

What is the EDGAR cut-off time for Form 13F on the deadline day?

EDGAR accepts filings until 10:00 p.m. ET, but any filing submitted after 5:30 p.m. ET receives the next business day's filing date and is therefore late. Form 13F is not among the exceptions to this rule. Build your internal deadline around 5:00 p.m. ET to allow for system issues and final sign-offs.