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SEC Schedule 13D & 13G Beneficial Ownership Filing Deadline Calculator

Ensure absolute compliance with the SEC's active accelerated rules. Calculate precise Schedule 13D and 13G filing deadlines, Exchange Act Rule 0-3 holiday adjustments, and EDGAR time-of-day cutoff limits.

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Schedule 13D Required
Filing Deadline DateFriday, August 21, 2026
Days Remaining7 days remaining
Metric Used5 Business Days

Calculation Reference: Computed starting from the Trigger Event Date of 2026-08-14 (Friday).

* Note: In compliance with standard SEC Exchange Act rules, the triggering event day itself acts as "Day 0", with computation beginning on the following day.

Step-by-Step Calculation Audit Trail

Verify exactly which dates are counted and which are excluded (such as weekends or SEC Federal Holidays) under Exchange Act Rule 0-3 guidelines:
Trigger Event Date (Day 0)2026-08-14
2026-08-15Saturday
WeekendWeekend
2026-08-16Sunday
WeekendWeekend
2026-08-17Monday
Day 1
2026-08-18Tuesday
Day 2
2026-08-19Wednesday
Day 3
2026-08-20Thursday
Day 4
2026-08-21Friday
Day 5
Exchange Act Rule 0-3 (Weekend/Holiday Rule): If the calculated filing deadline falls on a Saturday, Sunday, or a public federal holiday observed by the SEC, the filing is legally timely if submitted on the immediately following business day prior to the EDGAR cutoff.

Filing Readiness Action Checklist

  • Secure Active EDGAR Credentials: Verify you have an active Central Index Key (CIK), SEC Cryptographic Access Code (CCC), and Passphrase. If filing first-time, submit a notarized Form ID to the SEC to generate credentials.
  • Calculate Total Voting Class Percentage: Obtain the issuer's latest Form 10-K, 10-Q, or 8-K to verify total outstanding shares and calculate your precise beneficial ownership percentage.
  • Identify Disclosable Group Agreements (Schedule 13D): If acting in concert with other investors to acquire or vote shares, prepare the required Joint Filing Agreement Exhibit under Exchange Act Rule 13d-1(k).
  • Filer Intent Attestation (Schedule 13G): Verify you do not have any control intent, and prepare standard certifications (e.g., QII, Passive, or Exempt Category confirmations) required to file the simpler 13G.
  • Submit XML/HTML Form prior to 10:00 PM ET: Assemble Schedule 13D/13G contents into an XML or HTML formatted filing package, run a test submission, and transmit the final package on EDGAR before the 10:00 PM Eastern Time same-day cutoff.
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Guide to SEC Schedule 13D and 13G Beneficial Ownership Rules in 2026

Under Sections 13(d) and 13(g) of the Securities Exchange Act of 1934, when an investor or a "group" of investors collectively acquires beneficial ownership of more than 5% of any class of registered equity securities, they must disclose their ownership position to the public and the SEC. This critical disclosure provides transparency into who owns major stakes in public corporations and alerts the market of potential corporate takeovers or shareholder activism.

The New Accelerated Deadlines: Late 2024 Amendments in Action

For several decades, Schedule 13D/13G deadlines remained static (such as 10 calendar days for initial 13Ds). However, in response to modern rapid-fire algorithmic trading and asymmetric information advantages in corporate M&A, the SEC adopted sweeping amendments in late 2023. These updates went into full effect throughout 2024 and 2025, cementing highly accelerated, precise timelines for 2026:

  • Schedule 13D (Active Investors): The deadline to submit the initial 13D filing is cut in half from 10 calendar days to 5 business days from the transaction date. Amendments for material changes (like buying or selling 1% of the company) are now strictly due within 2 business days (previously "promptly").
  • Schedule 13G (Passive/Exempt/QII): All 13G periodic amendments must now be updated within 45 calendar days after the end of the calendar quarter (formerly calendar year-end) in which any change occurs.
  • Passive 13G Initial Filings: Must be filed within 5 business days of crossing 5%.
  • QII 13G Monthly Triggers: If a Qualified Institutional Investor (QII) crosses 10% beneficial ownership as of the end of any calendar month, they must file within 5 business days after month-end.

Active (Schedule 13D) vs. Passive (Schedule 13G) Investors

The choice of whether to file Schedule 13D or 13G is highly dependent on investor intent and filer category:

  • Schedule 13D: Must be filed by any investor who acquires more than 5% with an active control intent, meaning they intend to change or influence corporate policies, run a proxy campaign, seek board representation, or participate in M&A transactions. Because of its active nature, it requires robust disclosures under Items 1-7, including detailed plans for the company.
  • Schedule 13G: A significantly simplified form that requires much less disclosure. It is only available to three groups who lack control intent:
    • Qualified Institutional Investors (QIIs): Standard registered institutions (brokers, funds, insurance companies) holding shares in the normal course of business.
    • Passive Investors: General investors holding less than 20% of the class with purely passive investment intentions.
    • Exempt Investors: Investors holding more than 5% who are exempt from Section 13(d) filing requirements (e.g., pre-IPO founders, or shares acquired under conditions not considered "acquisitions" of equity).

EDGAR Cutoff Time Extension (10:00 PM Eastern Time)

To ease the operational burden of these compressed timelines, the SEC extended the EDGAR processing cutoff hour specifically for Schedule 13D and 13G filings. While standard SEC filings (like Forms 10-K, 10-Q, and 13F) must be submitted by 5:30 PM Eastern Time to receive that day's filing date, Schedule 13D and 13G filings enjoy an extended window up to 10:00 PM Eastern Time. Submissions received after 10:00 PM ET are stamped with the following business day's filing date.

Calculating Business Days vs. Calendar Days under Exchange Act Rules

A critical component of avoiding filing defaults is tracking the difference between calendar days and business days:

  • Business Days: Exclude Saturdays, Sundays, and any Federal Holiday observed by the SEC. For example, if your trigger occurs on the Wednesday before Thanksgiving, Thanksgiving Day (Thursday) and the following weekend are excluded from the 5 business days, making the deadline the following Wednesday.
  • Calendar Days (and Rule 0-3 Weekend/Holiday Rollover): If a deadline is defined in calendar days (like the 45-day quarterly 13G amendment window) and the final day lands on a Sunday, the filing deadline rolls forward to the next available business day (Monday), provided there is no intervening SEC Holiday.

Penalties and Corporate Consequences of Late Filings

The SEC actively monitors Schedule 13D/13G filings and enforces timely filing rules aggressively. Late filings can result in substantial monetary fines, permanent cease-and-desist orders, and public civil enforcement proceedings. Furthermore, in the context of corporate proxy battles or hostile acquisitions, a late beneficial ownership disclosure can lead to judicial injunctions, blocking voting rights or invalidating corporate takeovers due to disclosure fraud.

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