Beneficial Ownership Reporting: 13D, 13G, and Form 4 in 2026

If you just crossed 5% in a public company's stock, or you're a director who already holds a large block, you face two distinct SEC reporting regimes that most compliance guides treat separately. This walkthrough maps both, shows you exactly which form to file and when, and flags the traps that catch even experienced filers.

Key takeaway: Crossing 5% triggers Schedule 13D or 13G under Section 13. Crossing 10% as a director or officer also triggers Section 16 (Forms 3, 4, and 5). These regimes are independent. Satisfying one does not satisfy the other.

What Are Schedules 13D and 13G, and What Do They Report?

Schedule 13D and Schedule 13G are the SEC's beneficial ownership reports for any person or group that acquires more than 5% of a class of registered equity securities. They serve a market transparency function: when a large block changes hands, the public needs to know who owns it and why.

The two schedules cover the same triggering event but differ sharply in what they disclose and who can use them:

• Schedule 13D is the full-disclosure form. It requires the filer's identity, source of funds, purpose of the acquisition, and any plans or proposals regarding the issuer, including potential mergers, asset sales, or board changes. Activist investors file 13D.
• Schedule 13G is the short-form alternative. It requires far less disclosure and is available only to specific categories of filers who are not seeking to influence or control the issuer.

For a deep comparison of the two forms, see Schedule 13D vs. 13G: The 2026 Comparison.

Step 1: Determine Whether You Have Beneficial Ownership

Before you can decide which form to file, you need to know whether you actually have "beneficial ownership" under Rule 13d-3.

Beneficial ownership exists if you have or share:

1. Voting power -- the power to vote or direct the voting of the security, OR
2. Dispositive power -- the power to dispose of or direct the disposition of the security.

The 60-day rule is the most frequently missed piece: options, warrants, rights, or conversion privileges exercisable within 60 days count toward your ownership percentage. A fund that holds 4.2% in shares but has warrants exercisable within 60 days covering another 1% is already over the 5% threshold and must file.

Shares held through a trust, partnership, or subsidiary count as indirect beneficial ownership. Shares held in a margin account or pledged as collateral generally count too, because the pledgor typically retains voting and dispositive power until the lender exercises its rights.

One denominator trap: shares repurchased by the issuer do not count as outstanding, even if the issuer has not retired them or booked them as treasury stock. Section 13(d)(4) explicitly excludes shares "held by or for the account of the issuer or a subsidiary of the issuer." A buyback program shrinks the denominator and can push your percentage over 5% without you buying a single additional share.

For the full treatment of the 5% threshold mechanics, see The Beneficial Ownership 5% Threshold Explained.

Step 2: Decide -- 13D or 13G?

This is the decision most filers get wrong. Work through it in order.

Who is required to file a 13G?

Three categories of filers may use Schedule 13G instead of 13D, each with different eligibility conditions:

If you do not fit any of these categories, you file Schedule 13D. Full stop.

The intent test

The dividing line between 13D and 13G is purpose. A 13G filer must not have acquired the securities "with the purpose or effect of changing or influencing control" of the issuer. This is a facts-and-circumstances test with no bright line.

Practitioners treat the following as red flags that point toward 13D:

• Communicating to management about board composition, strategy, or capital allocation
• Nominating or threatening to nominate directors
• Soliciting other shareholders to vote against management
• Entering into a voting agreement with other large holders
• Acquiring a position specifically to block a transaction

If any of these apply, file 13D. Filing 13G when 13D was required is not a minor paperwork error. The SEC can bring an enforcement action, and issuers or shareholders can pursue private litigation. See Switching from Schedule 13G to 13D: The 2026 Compliance Playbook for the exact conversion mechanics.

The 20% hard cap for passive investors

A passive investor (Rule 13d-1(c)) must hold less than 20% of the class. Reaching or exceeding 20% automatically disqualifies the passive investor 13G, regardless of intent. The filer must switch to Schedule 13D within 5 calendar days.

The exempt investor 12-month look-back

For investors in companies that recently went public, the exempt investor category (Rule 13d-1(d)) carries a nuanced trap. If you acquired more than 2% of the class during the 12 months preceding your most recent acquisition, you lose exempt investor eligibility and must file 13D. The 12-month look-back runs all the way back to when the issuer was privately held if the acquisition occurs within 12 months of the Form 10 effective date. This catches pre-IPO investors who bought additional shares in the months before or just after the IPO.

As the SEC's Division of Corporation Finance CDIs (last updated September 2, 2026) confirm: a holder who has not acquired any securities since the Form 10 became effective files Schedule 13G under Rule 13d-1(d) within 45 days after the end of the calendar quarter in which the class was registered.

Step 3: Know the Current Filing Deadlines (Post-September 2024)

The SEC's 2023 amendments to Regulation 13D-G took effect September 30, 2024, and represent the most significant overhaul of this regime in decades. Many filers are still operating on the old 10-day and 45-day rules. That is a compliance failure.

As Paul Hastings noted: "The deadlines for filings under Section 13 were accelerated as of September 30, 2024, pursuant to amendments drafted to modernize beneficial ownership reporting."

Complete 2026 Beneficial Ownership Reporting Deadline Table

Note: The SEC also extended the EDGAR filing cut-off time from 5:30 p.m. to 10:00 p.m. Eastern Time to accommodate the shorter windows.

Step 4: Understand the Group Formation Trap

This is the single most underappreciated risk in beneficial ownership reporting, particularly for ESG-focused institutional investors engaged in collaborative stewardship.

Under Section 13(d)(3), two or more persons who agree to act together for the purpose of acquiring, holding, voting, or disposing of equity securities are treated as a single "person" for the 5% threshold. Each member of the group must file, even if no individual member holds more than 5%.

Group formation does not require a written agreement. Informal coordination, joint letters to management, side agreements, or coordinated voting can all trigger group status. Institutional investors participating in collaborative engagement initiatives -- think coordinated ESG shareholder letters or joint nominations -- need to assess group formation risk carefully before acting.

The SEC's CDIs add a further wrinkle: adding a new member to a reporting group that owns more than 2% of the class forces the entire group to switch from Schedule 13G to Schedule 13D. As the SEC put it directly: "By adding a new member that beneficially owns more than two percent of the class of equity securities registered under Section 12, the group effectively acquired those securities. The group and all of its members would be required to report their holdings on Schedule 13D."

For a full treatment of group formation mechanics, see Beneficial Ownership Group Formation Under Section 13: The 2026 Definitive Guide.

Step 5: Check Whether Section 16 Also Applies

Section 13 and Section 16 are independent regimes. A person can be subject to both simultaneously, and this dual obligation is one of the most commonly missed compliance issues.

Section 16 applies to "insiders":

• Directors of a company with Section 12-registered securities
• Officers of such a company
• Beneficial owners of more than 10% of any class of registered equity securities

Note the threshold difference: Section 13 triggers at 5%, Section 16 at 10% (for non-director, non-officer holders).

A director who also holds 6% of the company's stock must file:

• A Schedule 13D or 13G (Section 13, because of the 5% position), AND
• A Form 3 on becoming a director, then Form 4 for every subsequent transaction (Section 16, because of the director status)

Neither filing substitutes for the other. For the full Section 16 framework, see Section 16 Reporting Requirements for Officers and Directors: 2026 Guide.

Form 4: The Section 16 workhorse

Form 4 must be filed within 2 business days of any reportable change in beneficial ownership by a Section 16 insider. This deadline has been in place since the Sarbanes-Oxley Act of 2002 and is unforgiving. A transaction that settles on Monday must be reported by Wednesday.

Reportable transactions include open-market purchases and sales, option exercises, gifts, and certain derivative transactions. For the full transaction code taxonomy, see Form 4 Transaction Codes: 2026 Practitioner Walkthrough.

Late Form 4 filers must be named in the company's annual proxy statement. The reputational cost is real and the SEC has brought enforcement actions against chronic late filers.

Step 6: Handle the New Cash-Settled Derivative Rule

The 2023 amendments introduced guidance on cash-settled derivatives that most top-ranking articles have not adequately explained. This matters for hedge funds and activist investors who build economic exposure through total return swaps or similar instruments before acquiring actual shares.

Under the new Rule 13d-3(e), a holder of cash-settled derivatives (including total return swaps referencing an issuer's equity) can be deemed a beneficial owner of the referenced securities if:

• The derivative's terms give the holder any voting or investment power over the underlying securities, OR
• The holder acquired the derivative to evade beneficial ownership reporting, OR
• The holder has the right to acquire the underlying security within 60 days, or acquires that right with a control purpose.

This is a significant expansion. A fund running a large total return swap position with a control purpose can no longer assume it sits outside the 13D/13G regime. The SEC also amended Schedule 13D to confirm that interests in all derivative securities, including cash-settled instruments, must be disclosed in Item 6. For more on this, see SEC Cash-Settled Swaps and Beneficial Ownership Explained.

Step 7: File in XML/XBRL Format

As of December 18, 2024, all Schedule 13D and 13G filers must submit their filings in structured XML/inline XBRL format through EDGAR. This applies to all filers, not just large accelerated filers.

This is an operational change, not just a formatting one. It requires:

• Updated filing workflows and templates
• Vendor or software capable of generating compliant XML output
• Testing against EDGAR's submission requirements before a live deadline

Filers who have not updated their workflows since the December 2024 mandate took effect are filing non-compliant documents. Check your vendor's capabilities now if you have not already.

Special Situations

ADRs and the 5% calculation

ADRs are not a separate class of equity securities for Section 13(d) purposes. As the SEC confirmed in Exchange Act Release No. 29226: "A reporting obligation under Section 13(d) is determined by ownership of the class of deposited securities, including ownership of those securities through ADRs." If you own 6% of outstanding ADRs but those ADRs represent only 4% of the underlying registered equity class, no 13D/13G filing is required.

Stock-for-stock mergers

If you receive more than 5% of an acquiring company's registered equity in a stock-for-stock merger, you cannot rely on the Section 13(d)(6)(A) exemption to avoid filing. That exemption applies only to the issuer acquiring its own securities in such an exchange, not to target shareholders receiving acquirer shares. You must file Schedule 13D or, if eligible, Schedule 13G.

Foreign private issuers and Section 16

Beginning March 18, 2026, Section 16 reporting obligations were extended to foreign private issuers. FPI directors, officers, and 10%+ shareholders listed on U.S. exchanges must now file Forms 3, 4, and 5 on the same deadlines as domestic issuers. This is a live compliance obligation right now for any FPI insider who has not yet set up their Section 16 filing infrastructure. See March 18, 2026: The Section 16 Deadline Every FPI Director Must Know.

When a 13G filer must switch to 13D

A 13G filer must convert to Schedule 13D if:

• Their intent changes to influencing or controlling the issuer
• Their holdings exceed 20% (passive investor category)
• They join a group that adds a new member holding more than 2% of the class

The switch must happen within 5 calendar days under the post-September 2024 rules. For the step-by-step conversion process, see Switching from Schedule 13G to 13D: The 2026 Compliance Playbook.

Penalties for Late or Missed Filings

The consequences are not theoretical:

• Section 13 violations: The SEC can bring civil enforcement actions. Courts have imposed injunctions, disgorgement, and civil penalties.
• Section 16 late Form 4s: The company must identify late filers by name in its annual proxy statement. The SEC has brought enforcement actions against both individual insiders and institutional investors for chronic late filing.
• Short-swing profits (Section 16(b)): Any insider who buys and sells (or sells and buys) the issuer's equity within any six-month period faces strict liability disgorgement of profits, regardless of intent. The company or any shareholder suing derivatively can recover. For the calculation mechanics, see Short-Swing Profit Rule Calculation: The Complete Practitioner Walkthrough.

FAQ

Do I need to fill out a beneficial ownership report if I own exactly 5%? No. The filing obligation is triggered by ownership of more than 5%. Exactly 5% does not require a Schedule 13D or 13G filing under Sections 13(d) or 13(g).

Is filing Schedule 13G a good idea for a passive institutional investor? Yes, if you qualify. Schedule 13G requires far less disclosure than 13D and carries later initial filing deadlines for QIIs. The risk is misclassifying as passive when your conduct or coordination with others triggers 13D. A wrongful 13G filing creates SEC enforcement exposure and may need to be refiled as a 13D.

If I own more than 5% but less than 10%, do I need to file a Form 4? Not solely because of the 5% position. Form 4 is a Section 16 obligation triggered by being a director, officer, or beneficial owner of more than 10% of a registered class. A 7% holder who is not a director or officer has no Form 4 obligation, but does have a Schedule 13D or 13G obligation.

Does Form 13F replace Schedule 13D or 13G? No. Form 13F is a separate quarterly obligation for institutional investment managers with $100 million or more in discretionary equity holdings. It covers all equity positions regardless of percentage. Schedule 13D/13G is triggered by crossing 5% in a single issuer's class. Many institutional investors are subject to both regimes simultaneously, and one does not substitute for the other. See Form 13F FAQ: 45-Day Deadline, Short Positions, and 2026 Rules.

What counts as a "material change" requiring a Schedule 13D amendment? The SEC has not defined material change precisely for 13D purposes, but has signaled that any acquisition or disposition of 1% or more of the outstanding class is material. Under the post-September 2024 rules, a 13D amendment must be filed within 2 business days of any material change. For 13G filers, the amendment is due within 45 days after the calendar quarter-end in which a material change occurred.