SEC Filing Deadlines 2026: Complete Calendar for All Forms

How SEC Filing Deadlines Are Calculated

SEC filing deadlines are calculated in calendar days from a reference event — the fiscal year end, the end of a calendar quarter, or the date of a triggering event — with automatic adjustment when the deadline falls on a weekend or federal holiday. The reference event and the applicable number of days are specified in the relevant SEC rules for each form type.

Company size matters significantly. The SEC categorizes reporting companies into tiers based on their public float (the market value of equity held by non-affiliates) and in some cases annual revenue. Larger companies have shorter deadlines, reflecting the SEC's judgment that greater resources should enable faster disclosure preparation. The three primary tiers are Large Accelerated Filer, Accelerated Filer, and Non-Accelerated Filer/Smaller Reporting Company.

Filer status is determined as of the last business day of a company's most recently completed second fiscal quarter. A company's status can change from year to year as its public float fluctuates. Companies newly qualifying as accelerated or large accelerated filers must comply with the shorter deadlines starting with the first periodic report filed after the public float determination date.

Form 10-K Annual Report Deadlines 2026

10-K filing deadlines depend on filer classification:

Extension: Filing Form NT 10-K by the original deadline grants an automatic 15-day extension. The NT filing must state the reason for the delay and the expected filing date. Companies that miss the extended deadline face immediate compliance consequences.

For non-December 31 fiscal year companies: add the applicable number of days to your specific fiscal year end date. A June 30 fiscal year end company classified as a Large Accelerated Filer has a 10-K due August 29, 2026.

Form 10-Q Quarterly Report Deadlines 2026

10-Q is required for Q1, Q2, and Q3 (Q4 is covered by the 10-K). Deadlines for calendar year companies:

Extension: Filing Form NT 10-Q by the original deadline grants a 5-day automatic extension. Note that large and accelerated filers both have 40-day deadlines — there is no distinction between these two categories for 10-Q purposes.

Form 8-K Current Report Deadlines

Form 8-K must be filed within 4 business days of the triggering event for most items. There is no NT 8-K form — no extensions are available. The 4-day clock starts from the date the company first becomes aware of the triggering event, or the date the event occurs, whichever is earlier.

Common 8-K triggering events and their deadlines:

• Material agreement entered, amended, or terminated: 4 business days
• Bankruptcy or receivership: 4 business days
• Results of operations (earnings release): 4 business days
• Departure or appointment of directors or principal officers: 4 business days
• Completion of an acquisition or disposition: 4 business days
• Amendment to articles of incorporation or bylaws: 4 business days
• Changes in fiscal year: 4 business days

Financial statements related to a material acquisition (Item 9.01 financial statements) may be filed via amendment (8-K/A) within 71 days of the original 8-K due date, providing additional time to prepare the required audited and unaudited target company financials.

Form 13F Deadlines 2026

Form 13F-HR is due 45 calendar days after each calendar quarter end. The same deadline applies to all filers — no accelerated/non-accelerated distinction exists for 13F.

Use our SEC RSS Feed Reader to monitor when new 13F filings appear for institutions you track — filings become visible in EDGAR immediately upon SEC acceptance.

Form 4 Insider Transaction Deadlines

Form 4 is one of the most time-sensitive SEC filings: it must be filed within 2 business days of any transaction in company securities by a director, officer, or 10%+ beneficial owner. The clock starts on the transaction date — not when the insider reports the transaction to the company's legal department.

Covered transactions requiring Form 4: open market purchases, open market sales, option exercises, warrant exercises, gifts of shares, conversions of convertible securities, and derivative transactions. Transactions executed under a pre-existing Rule 10b5-1 plan must also be reported on Form 4 within 2 business days — the plan provides an affirmative defense against insider trading liability but does not exempt the filing requirement.

Late Form 4 filings are publicly visible in EDGAR and are disclosed in the company's annual proxy statement. Companies must identify any director or officer who failed to file required Form 4 reports on a timely basis during the prior fiscal year. Repeated late filings attract SEC comment letters and investor attention.

Schedule 13D and 13G Deadlines

Schedule 13D must be filed within 10 calendar days of acquiring beneficial ownership of 5% or more of any class of registered equity securities. Amendments are required within 2 business days of any material change in previously reported information, including further purchases exceeding 1% of the class. The 10-day window for initial 13D filing (reduced from the original 10-day period) was shortened by SEC rulemaking in 2023 to 5 calendar days for acquisitions after February 2024.

Schedule 13G for passive institutional investors: initial filing is due within 45 days of calendar year end for passive holders above 5% at year end; or within 10 days of month end upon crossing 10%. Amendments are due within 45 days of calendar year end if holdings changed materially.

The distinction between 13D (activist) and 13G (passive) is a critical market signal. Investors closely monitor when a large passive holder of a company files an amended Schedule 13G upgrading to Schedule 13D — the upgrade to 13D requires disclosure of any plans to influence corporate control, and often precedes an activist campaign.

Consequences of Missing Deadlines

Loss of S-3 shelf registration eligibility is typically the most significant immediate consequence of late filings. Form S-3 — the short-form registration statement that large companies use for shelf offerings — requires the company to have filed all required reports on a timely basis in the preceding 12 months. A single late 10-K or 10-Q disqualifies the company from using S-3 for at least 12 months, requiring the use of the longer Form S-1 for any subsequent securities offerings.

Exchange listing notices: NYSE and NASDAQ both require listed companies to comply with SEC reporting obligations. Persistent late filings trigger deficiency notices, requiring a compliance plan submission. Companies that do not cure deficiencies within the exchange's specified period face potential trading suspension and delisting proceedings.

Certification failures: Under Sarbanes-Oxley, CEOs and CFOs certify in each periodic report that the filing does not contain material misstatements and that they have disclosed all material information to the audit committee and auditors. Knowingly filing a false certification is a criminal offense. Late filings that require restating previously certified financials create certification risk.

SEC comment letters and investigations: The SEC's Division of Corporation Finance actively monitors filing timelines and sends comment letters to late filers. Repeated violations or filings suggesting disclosure failures can escalate to formal SEC investigation.

How to Monitor SEC Filings in Real Time

For companies tracking their own compliance or monitoring competitors and portfolio companies, the most efficient tool is our SEC EDGAR RSS Feed Reader. The EDGAR RSS feed updates in near-real time as filings are accepted by the SEC, giving you immediate visibility when any company files a new 10-K, 10-Q, 8-K, or Form 4.

Our Company Search tool shows the complete filing history with dates, allowing you to verify whether recent periodic reports were filed within their applicable deadline. The presence of an NT (Notification of Late Filing) form in the filing history indicates a company exercised the automatic extension for that period.

For programmatic monitoring at scale, the EDGAR submissions API at data.sec.gov/submissions/CIK{cik10}.json returns complete filing history with dates for any company, enabling automated deadline compliance verification across a portfolio of companies. Our EDGAR API documentation covers how to build automated filing monitoring applications.