SEC Filing Deadlines 2026: A Practitioner Walkthrough
If you are a CFO, controller, or IR professional at a U.S. public company, this is your operational guide to every SEC filing deadline that matters in 2026. It covers the current calendar dates in force right now, the EDGAR mechanics that trip up even experienced filers, and the two landmark SEC proposals from May 2026 that could restructure your filer category and deadlines for years to come.
Key takeaway: Current 2026 deadlines remain fully operative. The May 2026 proposed rules are not yet effective. Plan against today's calendar, but start scenario-planning for a world where the large accelerated filer threshold doubles to $2 billion.
What Are the SEC Filing Deadlines for 2026?
The deadline that applies to your company depends entirely on your filer category. The current framework uses three tiers: large accelerated filer (LAF), accelerated filer (AF), and non-accelerated filer (NAF). Each tier gets a different window after fiscal year-end or quarter-end to file its periodic reports.
For companies with a December 31, 2025 fiscal year-end, the operative 2026 deadlines are:
Form 10-K Annual Report Deadlines
| Filer Category | Days After FY-End | Calendar Deadline |
|---|---|---|
| Large Accelerated Filer | 60 days | March 2, 2026* |
| Accelerated Filer | 75 days | March 16, 2026 |
| Non-Accelerated Filer | 90 days | March 31, 2026 |
*March 2 reflects the 60-day deadline falling on a weekend, shifted to the next business day. Source: Skadden 2026 SEC Filing Deadlines.
Form 10-Q Quarterly Report Deadlines
LAFs and AFs share the same 40-day window. NAFs get 45 days.
| Quarter-End | LAF / AF Due | NAF Due |
|---|---|---|
| March 31, 2026 | May 11, 2026* | May 15, 2026 |
| June 30, 2026 | August 10, 2026* | August 14, 2026 |
| September 30, 2026 | November 9, 2026 | November 16, 2026* |
*Asterisked dates reflect weekend or federal holiday adjustments to the next business day. Source: Skadden.
Other Key Periodic Deadlines
- Form 20-F (foreign private issuers, December 31, 2025 FY-end): April 30, 2026 (four months after fiscal year-end).
- Definitive proxy statement (if Part III of the 10-K incorporates proxy information by reference): April 30, 2026 (120 days after fiscal year-end).
- Form 11-K (employee benefit plan annual report): 90 days after the plan's fiscal year-end; plans subject to ERISA may file plan financial statements within 180 calendar days.
How to Determine Your Filer Category
Your filer category is the single most consequential compliance variable in your SEC calendar. Getting it wrong means applying the wrong deadline, and that can cost you Form S-3 shelf eligibility.
Under the current three-tier system:
- Large Accelerated Filer: Public float of at least $700 million, subject to Exchange Act periodic reporting for at least 12 months, has filed at least one annual report, and does not qualify as a smaller reporting company under the revenue test.
- Accelerated Filer: Public float of at least $75 million but less than $700 million, same seasoning and filing history requirements.
- Non-Accelerated Filer: Does not meet the LAF or AF thresholds.
Public float is measured as of the last business day of your second fiscal quarter. If your float straddles a threshold, check whether you have been subject to Exchange Act reporting for the required 12-month seasoning period.
Ownership and Beneficial Ownership Filing Deadlines
These deadlines run on transaction-level triggers, not fiscal year-end. Miss one and the SEC's enforcement staff will notice.
| Form / Schedule | Trigger | Deadline |
|---|---|---|
| Form 3 | Becoming an officer, director, or 10%+ beneficial owner | Within 10 days of the triggering event |
| Form 4 | Any reportable transaction | Two business days after the transaction date |
| Form 5 | Transactions deferred from Form 4 | 45 days after fiscal year-end (February 17, 2026 for December 31 year-ends) |
| Schedule 13D | Acquiring more than 5% beneficial ownership (active investor) | Five business days after crossing the threshold; amendments within two business days of any material change |
| Schedule 13G | Crossing 5% (qualified institutional or exempt investor) | 45 days after the quarter-end in which the threshold is crossed; or within five business days for passive investors |
| Form 13F | Institutional investment managers with $100M+ in Section 13(f) securities | 45 days after each calendar quarter-end |
For a detailed walkthrough of Schedule 13G mechanics and the 2023 deadline amendments, see Schedule 13G Filing Requirements: 2026 Practitioner Walkthrough. For Form 5 specifics, see Form 5 Filing Requirements: 2026 Practitioner Walkthrough.
Form 13F Deadlines for 2026
| Reporting Period | Due Date |
|---|---|
| Q4 2025 (December 31, 2025) | February 17, 2026 |
| Q1 2026 (March 31, 2026) | May 15, 2026 |
| Q2 2026 (June 30, 2026) | August 14, 2026 |
| Q3 2026 (September 30, 2026) | November 16, 2026 |
Source: SEC Staff FAQs on Form 13F. For the full arithmetic and EDGAR traps, see When Are 13F Filings Due? 2026 Deadlines, Deadline Arithmetic, and EDGAR Traps.
How the EDGAR 5:30 p.m. Cutoff Works in Practice
EDGAR accepts filings from 6 a.m. to 10 p.m. ET on weekdays, excluding federal holidays. But the operative cutoff for most filings is 5:30 p.m. A filing submitted at 5:31 p.m. on the deadline date receives the next business day's filing date, which means it is late.
This is one of the most common and avoidable compliance failures in SEC reporting.
The exceptions are narrow but important:
- Schedules 13D and 13G receive the actual filing date if submitted by 10 p.m. ET.
- Section 16 filings (Forms 3, 4, and 5) receive the actual filing date if submitted by 10 p.m. ET.
- Rule 462(b) registration statements receive the actual filing date if submitted by 10 p.m. ET.
For everything else, including your 10-K and 10-Q, the 5:30 p.m. wall is real. Build your internal deadline at least one business day before the SEC deadline, and never schedule a filing for the evening of the due date.
EDGAR Peak Filing Days to Avoid
The SEC's EDGAR Calendar publishes peak filing dates based on historical submission volume. Filing volume on peak days tends to spike in the hour before 10 p.m. For March 2026, peak days include March 2, 5, 6, 9, 10, 11, 12, 13, 16, and 17, precisely the dates when LAF and AF 10-Ks are due. Plan submissions for the morning of the deadline or, better, the day before.
EDGAR Release 26.3 was deployed on September 14, 2026. The June 2026 EDGAR release was cancelled. Monitor the EDGAR announcements page for any system changes that could affect your filing workflow.
EDGAR Next: Now Mandatory
The EDGAR Next transition became mandatory on September 15, 2025. All filers must now comply with the new account access and account management framework. EDGAR Next does not change filing deadlines, but it does change who can authorize and submit filings. If your team has not updated account delegations under the new framework, a filing could be blocked on deadline day.
How to Get an Extension: Rule 12b-25
Rule 12b-25 gives you an automatic extension if you file Form 12b-25 no later than one business day after the original filing deadline. The extension periods are:
- Form 10-K: 15 additional calendar days.
- Form 10-Q: 5 additional calendar days.
If the report is filed within the extension period, it is deemed timely filed. The catch: Form 12b-25 itself must be filed by 5:30 p.m. ET on the one-business-day deadline. Miss that window and you lose the extension entirely.
Practically, this means your compliance calendar should have two dates for every 10-K and 10-Q: the original SEC deadline and the 12b-25 trigger date. If the close process is running behind, the decision to file 12b-25 needs to happen before the original deadline passes, not after.
Source: Skadden 2026 SEC Filing Deadlines.
Financial Statement Staleness Dates for 2026 Offerings
If your company is planning a 2026 capital markets transaction, the filing deadline calendar is only half the picture. Regulation S-X Rule 3-12 governs when financial statements go stale for registration statements and offerings. Once your financials are stale, you cannot price a deal until you update them.
For companies with a December 31, 2025 fiscal year-end, 2025 Q3 financial statements go stale on the following dates:
| Filer Type | Staleness Date | Rule |
|---|---|---|
| IPOs, delinquent filers, loss corporations | February 17, 2026 | 45 days after year-end |
| Large Accelerated Filers | March 2, 2026 | 60 days after year-end |
| Accelerated Filers | March 16, 2026 | 75 days after year-end |
Source: Skadden 2026 SEC Filing Deadlines and Financial Statement Staleness Dates.
For a full staleness calendar covering 2026 offerings, KPMG and Latham & Watkins publish a desktop staleness calendar for 2026 offerings that maps staleness dates by filer type and transaction structure. If you are scheduling a 2026 offering, this is the resource to run alongside the filing deadline calendar.
The May 2026 SEC Proposals: What Changes, What Stays the Same
This is where most deadline calendar articles stop short. Two SEC proposals from May 2026 would fundamentally restructure filer categories and reporting frequency. Neither is in effect yet. But if you are near the current LAF threshold or planning a capital markets transaction in 2027 or 2028, you need to understand them now.
Proposed Filer Status Overhaul (May 19, 2026)
The SEC proposed to collapse the current three-tier system into two categories: large accelerated filers and non-accelerated filers. The accelerated filer category would be eliminated.
The key changes under the proposal:
- LAF threshold rises from $700 million to $2 billion in public float, a 186% increase.
- Seasoning period extends from 12 months to 60 consecutive calendar months. Every new registrant, regardless of float, would be a NAF for at least five years.
- Public float calculation changes. Instead of the closing price on the last business day of Q2, the proposal uses the average stock price over the last 10 trading days of the second fiscal quarter for each of the current and prior fiscal year. A company must exceed the $2 billion threshold for two consecutive years to become a LAF, and remain below it for two consecutive years to exit.
- A new 'small non-accelerated filer' (SNF) subcategory would cover NAFs with total assets of $35 million or less as of the end of each of the two most recent second fiscal quarters.
The SEC estimates that under the proposed rules, approximately 81% of domestic registrants would be classified as NAFs, up from approximately 52% under the current framework. Those NAFs would collectively represent approximately 6.5% of total market public float, compared to less than 1% today. Source: PwC Viewpoint analysis of the SEC proposal.
Key takeaway: If your company has a public float between $700 million and $2 billion, you are currently a LAF or AF. Under the proposed rules, you would become a NAF, gaining more lenient deadlines and losing the SOX 404(b) auditor attestation requirement.
Proposed Deadline Changes: Current vs. Proposed
| Filer Category | Form 10-K Deadline | Form 10-Q Deadline | SOX 404(b) Attestation |
|---|---|---|---|
| Current: Large Accelerated Filer | 60 days | 40 days | Required |
| Current: Accelerated Filer | 75 days | 40 days | Required |
| Current: Non-Accelerated Filer | 90 days | 45 days | Not required |
| Proposed: Large Accelerated Filer | 60 days (unchanged) | 40 days (unchanged) | Required (unchanged) |
| Proposed: Non-Accelerated Filer | 90 days (unchanged) | 45 days (unchanged) | Not required |
| Proposed: Small Non-Accelerated Filer | 120 days (+30 vs. current NAF) | 50 days (+5 vs. current NAF) | Not required |
Sources: PwC Viewpoint; KPMG FRV.
For current AFs and LAFs near the $2 billion threshold, the practical implication is significant: dropping to NAF status means gaining 15 to 30 extra days on the 10-K and eliminating the SOX 404(b) audit requirement, which is a material cost reduction. The SNF category, covering the smallest 18% of public companies by assets, would gain the most generous deadlines of any filer type in SEC history.
One important nuance: the proposed rules explicitly exclude foreign private issuers filing on FPI forms (20-F, 40-F, 6-K). The SEC indicated that FPI changes will be addressed in a separate project. Current FPI deadlines remain unchanged. Source: PwC Viewpoint.
As SEC Chairman Paul Atkins stated on May 19, 2026: "These proposals build upon the legislative and regulatory concepts that have proven successful in the past and aim to extend that success to more companies, particularly small and mid-sized companies, and incentivize them to go and stay public."
For a deeper analysis of how these proposals affect mid-cap filers specifically, see How the SEC's 2026 Proposal Affects Mid-Caps and SEC Filer Status Rulemaking 2026: The Compliance Transition Playbook.
Proposed Semiannual Reporting on Form 10-S (May 5, 2026)
A separate May 5, 2026 proposal would allow public companies to elect semiannual reporting on a new Form 10-S in lieu of quarterly 10-Q filings. Companies electing this option would file one semiannual report and one annual report per fiscal year, replacing three 10-Qs and one 10-K with two filings.
The proposed Form 10-S deadline: 40 days after the end of the first semiannual period for LAFs, or 45 days for NAFs.
Chairman Atkins framed the rationale directly: "The rigidity of the SEC's rules has prevented companies and their investors from determining for themselves the interim reporting frequency that best serves their business needs and investors."
This proposal is not yet effective. The comment period for the filer status proposal closed July 20, 2026, per KPMG FRV. As of September 30, 2026, neither proposal has been finalized. The SEC is now in the comment review phase. Companies should not restructure their reporting calendars based on these proposals until final rules are published.
What to Do Right Now: A Compliance Planning Checklist
Given the current operative deadlines and the pending proposals, here is the practical sequence for a December 31 fiscal year-end company:
- Confirm your filer category for the current year using your June 30, 2026 public float. Apply the current $700 million LAF threshold, not the proposed $2 billion figure.
- Map your 2026 deadline calendar using the tables above. Flag every date that falls on or near a weekend or federal holiday.
- Set internal deadlines at least one business day before each SEC deadline. For 10-K filings, build in the audit sign-off, board approval, and XBRL tagging time.
- Identify your 12b-25 trigger dates. For each 10-K and 10-Q, note the one-business-day window to file Form 12b-25 if needed.
- Check EDGAR Next compliance. Confirm that all authorized filers have updated account delegations under the mandatory framework.
- Avoid EDGAR peak filing days. In March, the peak cluster runs from March 2 through March 17. Submit earlier in the day or a day ahead.
- If planning a 2026 offering, map staleness dates now. Your 2025 Q3 financials go stale on different dates depending on your filer category. Coordinate with your underwriters and counsel before setting a pricing timeline.
- Scenario-plan for the proposed filer status rules. If your public float is between $700 million and $2 billion, model what NAF status would mean for your close calendar, audit scope, and disclosure obligations. Do not wait for finalization to start the analysis.
FAQ: SEC Filing Deadlines 2026
Is the US SEC no longer requiring quarterly reports? Not yet. The SEC proposed on May 5, 2026 to allow companies to elect semiannual reporting on a new Form 10-S in lieu of quarterly 10-Qs. This is a proposal only and has not been finalized. Quarterly 10-Q filings remain required for all domestic issuers in 2026.
What is the SEC filing deadline for a 10-K for fiscal year ended December 31, 2025? March 2, 2026 for large accelerated filers (60 days, adjusted for weekend); March 16, 2026 for accelerated filers (75 days); and March 31, 2026 for non-accelerated filers (90 days).
Is there an extension for the SEC annual filing deadline in 2026? Yes. Filing Form 12b-25 no later than one business day after the original 10-K deadline gives an issuer 15 additional calendar days. For a 10-Q, the extension is 5 additional calendar days. The Form 12b-25 itself must be filed by 5:30 p.m. ET on the extension trigger date.
What are the 10-Q filing deadlines for 2026? For large accelerated and accelerated filers: May 11 (Q1), August 10 (Q2), and November 9 (Q3). For non-accelerated filers: May 15 (Q1), August 14 (Q2), and November 16 (Q3). All dates assume a December 31 fiscal year-end and reflect weekend and holiday adjustments.
What is the Form 20-F deadline for 2026? April 30, 2026 for foreign private issuers with a December 31, 2025 fiscal year-end (four months after fiscal year-end). The proposed filer status reforms do not apply to FPIs; their deadlines remain unchanged.
When would the proposed filer status rules take effect? Neither the filer status overhaul nor the Form 10-S semiannual reporting proposal has been finalized as of September 30, 2026. The comment period for the filer status proposal closed July 20, 2026. Finalization, if it occurs, would include a transition period. Under the proposal, all registrants would perform an initial filer status assessment as of the end of their fiscal year preceding the effective date of the final rules, without regard to historical filer status.
What federal holidays does EDGAR observe in 2026? EDGAR is closed on New Year's Day (January 1), Martin Luther King Jr. Day (January 19), Washington's Birthday (February 16), Memorial Day (May 25), Independence Day (July 3 observed), Columbus Day (October 12), Veterans Day (November 11), Thanksgiving Day (November 26), and Christmas Day (December 25). When a filing deadline falls on a federal holiday, it shifts to the next business day.
