Form 3 vs Form 4 vs Form 5: 2026 SEC Insider Reporting Guide

If you're a compliance officer, corporate secretary, or general counsel responsible for Section 16 filings, this guide tells you exactly which form to file, when, and what happens if you get it wrong. It also covers the biggest change to this regime in nearly 50 years: the Holding Foreign Insiders Accountable Act (HFIAA), which brought foreign private issuer officers and directors into Section 16(a) for the first time, effective March 18, 2026.

Key takeaway: Form 3 is your initial ownership disclosure. Form 4 reports every transaction within two business days. Form 5 is the annual catch-all for exempt or missed transactions. All three must be filed electronically on EDGAR.

Quick-Reference Comparison: Form 3 vs Form 4 vs Form 5

What Is Form 3 and When Do You File It?

Form 3 is the initial statement of beneficial ownership that every new insider must file under Section 16(a) of the Securities Exchange Act of 1934. It captures a snapshot of all equity securities the person holds at the moment they become an insider.

The deadline is 10 calendar days after the person becomes a director, officer, or beneficial owner of more than 10% of a registered equity class. For IPOs, the deadline is the day the Exchange Act registration statement is declared effective, which is generally the pricing date. Miss that window and the late filing goes on the record immediately.

One point that trips up new compliance teams: Form 3 must be filed even if the insider owns zero securities. The form is submitted with the securities tables left blank. There is no exception for a director who hasn't yet received any equity. The SEC Form 3 instructions are explicit on this.

Form 3 contains two tables:

• Table I: Non-derivative securities beneficially owned (common stock, etc.)
• Table II: Derivative securities beneficially owned (options, warrants, convertible securities)

Form 3 also applies beyond operating companies. Under Section 30(h) of the Investment Company Act of 1940, officers, directors, advisory board members, and investment advisers of registered closed-end investment companies must file Form 3 as well.

What Is Form 4 and What Triggers It?

Form 4 is the statement of changes in beneficial ownership, and it is the form investors and regulators watch most closely. Every transaction that changes an insider's beneficial ownership requires a Form 4, regardless of the size of the transaction.

As Cleary Gottlieb partners Manuel Silva and Sarah Lewis noted on the Harvard Law School Forum on Corporate Governance: "Unlike amendments to Schedule 13D and 13G beneficial ownership reports, which are triggered when there have been material changes to previously reported content and changes in ownership above certain thresholds, a Form 4 must be filed for 'each transaction resulting in a change in beneficial ownership,' regardless of amount."

There is no de minimis exemption for domestic issuer insiders.

The Two-Business-Day Clock

The deadline is the end of the second business day following the day the transaction was executed. A sale executed on Tuesday must be filed by 10:00 pm Eastern time on Thursday. The form is deemed filed on the date received by the SEC. Rule 16a-3(h) provides a safe harbor for delivery to a third-party filing agent that guarantees delivery by the due date.

The clock starts on the execution date, not the settlement date. For open-market trades through a broker, the execution date is when the order is filled. For derivative conversions and certain other transactions, the Form 4 instructions (Instruction 2A) specify a "deemed execution date" that can differ from the calendar date the transaction closes. This is a nuanced timing trap that catches even experienced teams.

Form 4 Tables and the 10b5-1 Checkbox

Form 4 has two tables:

• Table I: Non-derivative securities (purchases, sales, grants, awards)
• Table II: Derivative securities (options, RSUs, warrants, convertible securities)

Each transaction is reported on a separate line for each class of securities. One Form 4 can cover multiple transactions.

Form 4 also includes a checkbox to indicate that a transaction was made pursuant to a Rule 10b5-1(c) plan. Checking this box does not eliminate the Form 4 filing obligation. It signals to the market that the trade was pre-planned under an approved arrangement and provides an affirmative defense against insider trading claims. The filing obligation remains.

There is also a checkbox for reporting persons who are no longer subject to Section 16 (for example, a director who has resigned). Checking it signals the departure, but Form 4 or Form 5 obligations can continue even after a person ceases to be an insider, for transactions that occurred during their tenure.

Transaction Codes: Getting Them Right

Every transaction on Form 4 carries a code. Using the wrong code is one of the most common compliance errors. The SEC Investor Bulletin identifies the key codes:

The F vs D confusion is the most persistent error in practice. Code D is a sale or transfer back to the company. Code F is specifically for shares withheld by the issuer to satisfy tax withholding obligations when an equity award vests or is net-settled. These are not the same thing, and using D when F is correct misrepresents the nature of the transaction.

A real-world example: in a Form 4 filed March 17, 2026 by Forward Air Corp's Chief Legal Officer for transactions on March 15, 2026, shares withheld by the issuer upon RSU vesting to satisfy minimum tax withholding obligations were correctly coded F. The filing was made within the two-business-day window. That is the correct treatment. Coding those shares as S (open-market sale) or D (sale back to company) would be wrong.

What Is Form 5 and When Is It Required?

Form 5 is the annual statement of beneficial ownership, due within 45 calendar days after the issuer's fiscal year-end. For a December 31 fiscal year, that means February 14.

As Mayer Brown's Liz Walsh and Jennifer Zepralka summarized on the Harvard Law Forum: "Form 5: filed to report any transaction not previously reported on Form 4. This is an annual catch-all filing for any unreported or exempt transactions and is required to be filed within 45 calendar days after the company's fiscal year end."

When Is Form 5 Required vs. Optional?

This is where most comparison articles get it wrong. Form 5 is only required if at least one transaction was not previously reported, either because it was exempt from Form 4 or because it was inadvertently omitted. If an insider had no unreported transactions during the year, no Form 5 is due.

Transactions eligible for Form 5 deferral include:

• Certain gifts received by the insider
• Inheritances
• Voting trust contributions and withdrawals
• Small acquisitions: purchases of less than $10,000 in a six-month period

An insider can also voluntarily report a Form 5-eligible transaction on Form 4 instead of waiting for the annual Form 5. The Form 4 instructions explicitly permit this. Gifts of securities, which are technically Form 5-eligible, are often reported on Form 4 for transparency. If you do this, the subsequent Form 5 does not need to re-report those transactions.

The practical risk: assuming Form 5 is always required (filing unnecessarily) or assuming it is never required (missing a mandatory filing for an inadvertently omitted transaction).

The 2026 HFIAA Change: Foreign Private Issuers Now Subject to Section 16(a)

This is the section that virtually every existing comparison article misses entirely, and it represents the most significant change to Section 16 in nearly five decades.

The Holding Foreign Insiders Accountable Act (HFIAA), signed into law on December 18, 2025 as part of the National Defense Authorization Act for FY2026, eliminated the longstanding exemption that had shielded officers and directors of foreign private issuers (FPIs) from Section 16(a) reporting. As Cleary Gottlieb noted, "The HFIAA breaks new ground by subjecting FPI officers and directors to Section 16(a)'s beneficial ownership reporting regime for the first time."

The SEC adopted conforming final rule amendments on February 27, 2026, more than two weeks before the March 18, 2026 statutory deadline. The amendments revised Exchange Act Rules 3a12-3(b) and 16a-2 and updated the physical text of Forms 3, 4, and 5. Mayer Brown confirmed that "the SEC's rule amendments do not go beyond what was required by the HFIAA, providing needed certainty with respect to the scope of this new obligation."

What FPI Compliance Teams Need to Know

Who is covered: FPI officers and directors of issuers with equity securities registered under Section 12(b) (exchange-listed) or Section 12(g). The HFIAA expressly covers only officers and directors. It does not extend Section 16(a) reporting to 10%+ beneficial owners of FPI securities.

What is not covered: The HFIAA amends only Section 16(a). FPI officers and directors remain exempt from Section 16(b) short-swing profit disgorgement and Section 16(c) short-sale prohibitions. They must disclose, but they cannot be sued for short-swing profits.

Defining "officer" for Section 16(a) purposes (Rule 16a-1(f)) includes:

• The president
• The principal financial officer
• The principal accounting officer
• Any vice-president in charge of a principal business unit, division, or function
• Other policy-making individuals, regardless of title

Title alone is not determinative. A person with a non-executive title who makes policy decisions may still be an officer under Rule 16a-1(f).

Two-tier board structures: For FPIs with supervisory and management boards (common in Germany, the Netherlands, and other European jurisdictions), the SEC stated that FPIs should apply the definition of "director" in Section 3(a)(7) of the Exchange Act, not the Form 20-F definition. This may be broader than the Form 20-F definition, which generally refers only to the supervisory board. Management board members may also be required to file.

The partial exemption: On March 5, 2026, the SEC issued an order granting an exemption from Section 16(a) for officers and directors of certain FPIs. FPI legal teams should review whether their issuer qualifies for this exemption before concluding that full Section 16(a) obligations apply.

Initial Form 3 deadline: FPI officers and directors who became subject to Section 16(a) on March 18, 2026 were required to file their initial Form 3 by that date. Going forward, the same 10-calendar-day deadline applies as for domestic issuer insiders.

Transaction codes still apply: The SEC clarified that the transaction codes in the Form 4 and Form 5 instructions, including codes that reference Rule 16b-3 and other Section 16 rules, apply to FPI directors and officers even though they remain exempt from Section 16(b).

Updated March 2026 Form Versions

The March 2026 versions of Forms 3, 4, and 5 include new optional fields designed for FPI filers:

• Foreign trading symbol: Box 3a on Form 3; Box 2a on Forms 4 and 5. When shares trade in both U.S. and non-U.S. markets, both symbols should be included. If shares only have a foreign trading symbol, the filer may enter it in the mandatory first box or enter "none" and use the new second box.
• Postal code and country code: Added to the reporting person's address fields on all three forms. EDGAR country codes follow the EDGAR Form D XML Technical specification.

The OMB approval for the current versions of Forms 3, 4, and 5 expires August 31, 2026, which means updated form versions may be issued in late 2026. Compliance teams building automated filing workflows should plan for a potential form revision.

Common Mistakes and Enforcement Consequences

Late and incorrect filings carry real consequences. The most immediate is proxy statement disclosure: under Item 405 of Regulation S-K, companies must identify in their annual proxy any director or officer who failed to timely file a required Form 3, 4, or 5 during the prior fiscal year. That disclosure is public, permanent, and noticed by governance-focused institutional investors.

Beyond reputational exposure, intentional misstatements or omissions on any of the three forms constitute federal criminal violations under 18 U.S.C. Section 1001 and 15 U.S.C. Section 78ff(a). This warning appears on the signature page of all three forms.

The most common errors to avoid:

1. Confusing calendar days with business days. The Form 4 deadline is two business days. The Form 3 deadline is 10 calendar days. The Form 5 deadline is 45 calendar days. These are not interchangeable.
2. Not filing Form 3 with zero holdings. The form is required regardless of whether the insider owns any securities.
3. Using code S or D instead of F for tax withholding. Shares withheld by the issuer on RSU vesting are code F, not S or D.
4. Treating Form 5 as always required. It is only required if there is at least one unreported transaction.
5. Assuming a 10b5-1 plan eliminates the Form 4 obligation. It does not. It provides an affirmative defense; the filing is still due within two business days.
6. Missing Form 4 obligations after leaving the company. Transactions that occurred during the insider's tenure must still be reported even after they resign or are terminated.
7. For FPI teams: assuming the HFIAA covers 10%+ holders. It does not. Only officers and directors of FPIs are now subject to Section 16(a).
8. For FPI teams with two-tier boards: using the Form 20-F board definition. The Section 3(a)(7) Exchange Act definition of "director" is the correct reference and may capture management board members.

Filing Mechanics: EDGAR Online Forms

All three forms must be filed electronically through EDGAR. Paper filings do not satisfy the SEC obligation. The SEC Form 3 instructions state explicitly: "You can only satisfy an SEC filing obligation by submitting the information required by this form to the SEC in electronic format online at https://www.onlineforms.edgarfiling.sec.gov."

For newly-obligated FPI insiders filing for the first time, the practical steps are:

1. Obtain an EDGAR filer ID (CIK) and access codes through the EDGAR filing system.
2. Confirm whether the issuer's EDGAR filer account can be used to submit on behalf of the insider, or whether the insider needs a separate CIK.
3. Determine whether to file directly through EDGAR Online Forms or through a third-party filing agent. For FPI teams unfamiliar with the system, a filing agent is often the faster path to compliance.
4. Use the March 2026 form versions, including the new optional foreign trading symbol and country code fields.

All Forms 3, 4, and 5 are publicly searchable on EDGAR immediately upon filing.

For a broader look at the Section 16 compliance framework, including the interaction between these forms and the insider trading policy requirements, see Finrep's Section 16 Insider Reporting Compliance Guide 2026. For the coordination between Form 4 and Form 144 on Rule 144 sales by affiliates, see the Form 144 Reporting Requirements for Insiders: 2026 Compliance Guide. If your company is approaching an IPO and needs to understand when Form 3 obligations first attach, the IPO Preparation SEC Filing Checklist for Private Companies (2026) covers the full timeline.

FAQ: Form 3 vs Form 4 vs Form 5

Do I have to file Form 3 if I own no securities when I become an insider? Yes. Form 3 is required within 10 calendar days of becoming an insider regardless of whether you hold any securities. The form is filed with the securities tables left blank.

What transactions can be deferred to Form 5 instead of reported on Form 4? Certain gifts received by the insider, inheritances, voting trust contributions and withdrawals, and small acquisitions (purchases of less than $10,000 in a six-month period) are eligible for Form 5 deferral. You can also voluntarily report these on Form 4 to avoid the annual filing.

What is the exact Form 4 deadline for a transaction executed on a Monday? The end of the second business day following execution, which would be Wednesday by 10:00 pm Eastern time, assuming no holidays intervene.

Do FPI officers and directors now have to file Forms 3, 4, and 5? Yes, effective March 18, 2026, under the HFIAA. They are subject to Section 16(a) disclosure obligations but remain exempt from Section 16(b) short-swing profit disgorgement and Section 16(c) short-sale prohibitions. A partial exemption order issued March 5, 2026 may apply to certain FPIs.

What is the Rule 10b5-1 checkbox on Form 4? It indicates that the transaction was made pursuant to a pre-approved Rule 10b5-1(c) trading plan. Checking it does not eliminate the Form 4 filing obligation. It signals to the market that the trade was pre-planned and supports an affirmative defense against insider trading claims.

What happens if I miss a Form 4 deadline? The late filing must still be made. The company must disclose the delinquency in its annual proxy statement under Item 405 of Regulation S-K. Intentional misstatements or omissions on the form are federal criminal violations under 18 U.S.C. Section 1001 and 15 U.S.C. Section 78ff(a).

Can one Form 4 cover multiple transactions? Yes. Multiple transactions can be reported on a single Form 4, with each transaction on a separate line for each class of securities.

How do I amend a Form 3, 4, or 5 if I made an error? File an amendment (Form 3/A, 4/A, or 5/A) through EDGAR as promptly as possible. Prompt amendment is important: compounding an original error by delaying the correction increases both the enforcement and reputational risk.