Schedule 13D vs. Schedule 13G: What’s the Difference and When to File Each

Written By Spencer Wirick

When an investor acquires more than 5% of a public company’s voting equity, they trigger a federal disclosure obligation under Section 13(d) of the Securities Exchange Act. The question is which form they must file – Schedule 13D or Schedule 13G. The answer turns on who the investor is and what they intend to do with that stake.

This guide explains the differences between the two schedules, who qualifies to file each, and what deadlines apply – including the accelerated rules that took effect September 30, 2024.

What Is “Beneficial Ownership”?

Under Rule 13d-3, a person is a beneficial owner of a security if they directly or indirectly possess:

  • Voting power – the power to vote or direct the vote of those shares, or

  • Investment power – the power to dispose of or direct the disposition of those shares.

Beneficial ownership may exist through contracts, arrangements, understandings, or relationships – not just direct ownership. It is distinct from record ownership.

It also includes the right to acquire such power within 60 days, for example, through options, warrants, or convertible securities.

Individuals, groups acting in concert, and institutional entities may all qualify as beneficial owners. Group membership is an important concept: two or more persons acting together to acquire or hold securities may be deemed a “group,” and their holdings are aggregated for threshold purposes.

Key Differences Between Schedule 13D and Schedule 13G

Both schedules apply when beneficial ownership exceeds 5%. The primary distinction is intent and eligibility.

Schedule 13D: The Full Disclosure Form

Schedule 13D is required when an investor acquires more than 5% of a class of registered voting equity securities and does not qualify to file on Schedule 13G. It is the default filing for investors who may seek to influence or control the issuer.

Who Files Schedule 13D?

  • Activist investors building a position to push for board changes, strategic alternatives, or management changes

  • Acquirers or potential acquirers in an M&A context

  • Any investor who has crossed 5% and cannot satisfy the eligibility requirements for Schedule 13G

What Must Be Disclosed?

Schedule 13D requires significantly more detail than 13G, including:

  • Identity and background of the filer and any group members

  • Source and amount of funds used to acquire the securities

  • Purpose of the acquisition and any plans relating to the issuer (e.g., board seats, mergers, asset sales)

  • Contracts, arrangements, or understandings with any person relating to the securities

  • Any transactions in the securities within the past 60 days

Initial Filing Deadline

Schedule 13D must be filed within 5 business days after the date beneficial ownership exceeds 5%.

Amendment Requirements

A Schedule 13D amendment must be filed within 2 business days after a material change.

A material change includes, but is not limited to:

  • An acquisition or disposition of 1% or more of the outstanding class (deemed material per Rule 13d-2)

  • A change in intent or purpose with respect to the issuer

  • New or modified plans relating to control (board representation, mergers, asset sales, etc.)

  • Changes in financing arrangements or contracts concerning the securities

Schedule 13G: The Streamlined Form for Passive and Institutional Investors

Schedule 13G is available to certain investors who exceed the 5% threshold but do not seek to influence or control the issuer. It requires less detailed disclosure and, depending on filer type, allows more time to file.

Eligibility is defined by rule. There are three categories of Schedule 13G filers.

1. Qualified Institutional Investors (Rule 13d-1(b))

QIIs are regulated financial entities that acquire securities in the ordinary course of business – not with the purpose or effect of influencing control. Examples include:

  • Registered investment advisers

  • Registered investment companies (mutual funds, ETFs)

  • Broker-dealers

  • Banks

  • Insurance companies

  • Employee benefit plans (ERISA-covered) and certain pension funds

  • Savings associations and certain other regulated entities

The QII category is defined specifically in Rule 13d-1(b) and is not a self-certification – the entity must fall within one of the enumerated types.

2. Passive Investors (Rule 13d-1(c))

A passive investor is any person who:

  • Acquires beneficial ownership of more than 5% but less than 20% of the class, and

  • Did not acquire the securities with the purpose or effect of changing or influencing control of the issuer (and does not currently have such purpose or effect).

Unlike the QII category, passive investor eligibility is not limited to institutional entities. An individual investor may qualify, provided both conditions are met.

Important: The 20% Cap

Passive investors lose Schedule 13G eligibility if beneficial ownership reaches or exceeds 20%.

At that point, a Schedule 13D must be filed within 5 business days, regardless of intent.

3. Exempt Investors (Rule 13d-1(d))

Exempt investors are those whose beneficial ownership exceeds 5% but was acquired or formed prior to the issuer’s Section 12 registration, or who otherwise qualify for a specific exemption. This category has broader annual amendment obligations that have now been converted to quarterly.

Filing Deadlines (Effective September 30, 2024)

The SEC’s 2023 amendments to the beneficial ownership rules accelerated several Schedule 13G deadlines. These new rules took effect on September 30, 2024. The following table summarizes all current deadlines.

Schedule 13D Deadline

5 business days from the date beneficial ownership exceeds 5%.

Schedule 13G – Passive Investor Deadlines

  • Initial filing: 5 business days after crossing 5%

  • Quarterly amendment: 45 days after the end of the calendar quarter in which any material change occurred

  • Crossing 10%: Amendment due within 2 business days of crossing the 10% threshold

  • After 10%: Any 5%+ increase or decrease in ownership requires an amendment within 2 business days of the occurrence

Schedule 13G – QII Deadlines

  • Initial filing: The earlier of (a) 45 days after the end of the calendar quarter in which beneficial ownership first exceeds 5% at quarter-end, or (b) 5 business days after the end of the first month in which beneficial ownership exceeds 10% at month-end

  • Quarterly amendment: 45 days after quarter-end in which any material change occurred

  • After crossing 10% at month-end: Amendment due within 5 business days after that month-end

  • After 10%: Any 5%+ increase or decrease in month-end ownership requires an amendment within 5 business days after that month-end

Schedule 13G – Exempt Investor Deadlines

  • Initial filing: 45 days after the end of the calendar quarter in which beneficial ownership first exceeds 5%

  • Amendment: 45 days after the end of the calendar quarter in which any material change occurred

When Must a Filer Switch from 13G to 13D?

A Schedule 13G filer must switch to Schedule 13D and file within 5 business days if:

  • The investor develops the purpose or effect of influencing or controlling the issuer (Passive or QII filers)

  • A Passive Investor’s beneficial ownership reaches or exceeds 20%

  • A QII no longer satisfies the eligibility requirements of Rule 13d-1(b)

Once the 13D is filed, the 13G is considered superseded. Note that during any period in which a 13G filer is obligated to file a 13D but has not yet done so, certain acquisition restrictions may apply under Rules 13d-1(e) through (g). Legal counsel should be consulted whenever eligibility is in question.

Can a 13D Filer Later File on Schedule 13G?

In certain circumstances, yes. If the investor genuinely abandons any control intent and meets all Schedule 13G eligibility criteria (including being a QII or Passive Investor), they may be able to revert to 13G. This analysis is highly fact-specific, and legal guidance is strongly recommended before making that determination.

How These Filings Affect Public Companies

Schedule 13D as an Activism Signal

A 13D filing frequently signals that an investor may seek board representation, push for strategic alternatives, demand operational or management changes, or initiate a proxy contest. Public companies typically monitor new 13D filings in their stock as early indicators of potential activism.

Schedule 13G as a Transparency Mechanism

Schedule 13G filings generally indicate passive institutional ownership – index funds, long-only asset managers, or similar investors. While less confrontational, they provide important transparency about significant ownership concentrations.

All Schedule 13D and 13G filings are publicly available on the SEC’s EDGAR database.

What Happens If You File the Wrong Form or Miss a Deadline?

Filing Schedule 13G when 13D is required – or failing to amend timely – can trigger SEC scrutiny and potential enforcement action. The SEC has brought enforcement actions for late or inaccurate beneficial ownership reporting, including civil penalties in certain cases.

If eligibility is unclear, legal counsel should be consulted before filing.

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ACN Solutions does not determine whether Schedule 13D or 13G applies. Clients should consult legal counsel to evaluate their reporting obligations.

Frequently Asked Questions

What is the difference between Schedule 13D and Schedule 13G?

Both report beneficial ownership exceeding 5% of a registered voting equity class. The primary difference is intent. Schedule 13D applies to investors who may influence or control the issuer and requires detailed disclosure. Schedule 13G is available to passive or institutional investors who meet specific eligibility requirements and provides a streamlined disclosure.

Who qualifies as a Qualified Institutional Investor?

QIIs are regulated financial entities enumerated in Rule 13d-1(b), such as registered investment advisers, registered investment companies, broker-dealers, banks, and insurance companies. Eligibility requires that the securities be acquired in the ordinary course of business and not with a control purpose.

What happens when a Passive Investor exceeds 20%?

The investor must file Schedule 13D within 5 business days and will no longer be eligible to report on Schedule 13G, regardless of their intent.

What changed on September 30, 2024?

The SEC’s 2023 amendments accelerated several Schedule 13G deadlines. Most notably: QIIs must now file initial reports within 45 days of quarter-end (down from 45 days after year-end); Passive Investors must now file initial reports within 5 business days (reduced from 10); all filers must now amend within 45 days after the calendar quarter in which a material change occurred (down from 45 days after year-end); and both QIIs and Passive Investors face faster amendment deadlines once beneficial ownership exceeds 10%.

Are these filings public?

Yes. All Schedule 13D and 13G filings are publicly available on the SEC’s EDGAR database.

Related Resources

Spencer Wirick
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