Form 4 vs Form 5 SEC Reporting: The 2026 Comparison Guide

If you're a compliance officer or equity plan administrator deciding which Section 16 form to file, the core answer is straightforward: Form 4 is the real-time workhorse, due within two business days of almost every transaction. Form 5 is a narrow annual safety valve, due within 45 calendar days after fiscal year-end, and only required when at least one transaction was not previously reported.

Most compliance teams already know that much. What trips them up is the edge cases: which transactions can actually be deferred to Form 5, what happens when a Form 4 is missed, whether Form 5 is even required this year, and what the 2026 National Defense Authorization Act means for foreign private issuers who are newly inside the Section 16 regime. This guide answers all of it, with a direct comparison so you can make the call without opening another tab.

Key takeaway: Form 4 covers the vast majority of reportable events in near-real time. Form 5 is not an annual obligation for every insider. It is only required when at least one transaction was unreported during the year, either because it was exempt from Form 4 or because it was missed.

Form 4 vs Form 5: Side-by-Side Comparison

Both forms are filed electronically on EDGAR and are immediately public. The structural difference is timing and scope, not format.

What Triggers a Form 4 Filing?

Form 4 is required within two business days of virtually any transaction that changes an insider's beneficial ownership under Section 16(a) of the Securities Exchange Act of 1934. There is no de minimis exemption for domestic issuer insiders.

The March 2026 revision of Form 4 is the operative version. It covers:

• Open-market purchases (code P) and sales (code S)
• Equity grants and awards from the company (code A)
• Option exercises and derivative conversions (code M)
• Shares withheld for tax on vesting (code F, not code D)
• Gifts of securities BY the insider (code G)
• Equity swaps and hedging transactions (code K)
• Sales or transfers back to the company (code D)
• Voluntary reports of Form 5-eligible transactions (code V)

For a full breakdown of all 20 transaction codes and how to choose the right one, see Finrep's Form 4 transaction codes guide.

The two-business-day clock starts on the execution date, not the settlement date. For open-market trades, that is when the broker fills the order. For equity awards and certain derivative transactions, the Form 4 General Instructions specify a "deemed execution date" under Rule 16a-3(g) that can differ from the calendar date the transaction closes. This is one of the most common timing traps for equity plan administrators. For the full deadline mechanics, see Finrep's Form 4 filing deadline guide.

The 10b5-1 Checkbox on Form 4

The March 2026 Form 4 includes a checkbox to indicate that a transaction was made pursuant to a Rule 10b5-1(c) contract, instruction, or written plan intended to satisfy the affirmative defense conditions. This checkbox was added as part of the SEC's 2022-2023 amendments to Rule 10b5-1 and is a live compliance requirement.

Checking the box does not eliminate the Form 4 filing obligation. It signals to the market that the trade was pre-planned under an approved arrangement, which provides an affirmative defense against insider trading claims. Equity plan administrators must confirm with legal counsel whether each sale under a 10b5-1 plan qualifies before checking the box. Checking it incorrectly is a misstatement on a federal filing.

What Happens When an Insider Leaves?

The March 2026 Form 4 includes a checkbox for reporting persons who are no longer subject to Section 16. The form is explicit: "Form 4 or Form 5 obligations may continue." A director who resigns mid-year may still owe a Form 4 for transactions that occurred during their tenure. This catches departing officers and directors off guard more often than it should.

What Goes on Form 5 Instead of Form 4?

Form 5 covers two categories of transactions: those the SEC permits to be deferred from real-time Form 4 reporting, and those that should have been on Form 4 but were not filed on time.

The deferred-reporting category is narrow. As of 2026, it most commonly includes:

1. Small acquisitions: Purchases of less than $10,000 in a six-month period. These are exempt from Form 4's real-time requirement and may be reported annually on Form 5 instead. Once cumulative purchases in a six-month window exceed $10,000, the exemption is lost and Form 4 is required.
2. Gifts TO the insider (received by the insider): Securities received as a gift by the insider may be deferred to Form 5.

Those two categories are the practical universe of legitimate Form 5 deferrals for most insiders. The second category is also the source of the most common compliance error in this area.

The Gift Direction Trap

This distinction catches compliance teams repeatedly:

• Gift BY the insider (given away): Must be reported on Form 4 within two business days. Code G.
• Gift TO the insider (received): May be deferred to Form 5.

The direction of the gift determines the form. An executive who donates shares to a charity files Form 4 immediately. An executive who receives shares as a gift from a family member can defer to Form 5. Getting this backwards is a reportable error.

Delinquent Transactions on Form 5

The second Form 5 category is delinquent transactions: Form 4 filings that were simply missed. Form 5 can serve as a catch-all for these, but it does not erase the violation. As the SEC Form 4 General Instructions state: "Form 5 transactions may be reported on a later Form 4 or Form 5, provided all transactions are reported by the required date."

The company must still disclose the delinquency in its annual proxy statement, naming the insider and the number of late filings. That proxy disclosure is the reputational enforcement mechanism the SEC relies on, and it is publicly searchable. For a full picture of enforcement consequences, see Finrep's SEC late filing penalties guide.

Do You Have to File Form 5 Every Year?

No. Form 5 is only required when at least one transaction was not reported during the fiscal year, either because it was exempt from Form 4 or because it was missed. The SEC's investor bulletin is explicit on this point: Form 5 is only required "when at least one transaction, because of an exemption or failure to earlier report, was not reported during the year."

If all transactions were timely reported on Form 4, no Form 5 is required. Many compliance teams file Form 5 as a matter of annual routine regardless, which is unnecessary and adds filing burden without benefit.

The Voluntary Form 4 Strategy (Code V)

There is a practical alternative to Form 5 for exempt transactions: report them voluntarily on Form 4 using the "V" transaction code modifier. Many compliance practitioners prefer this approach for two reasons:

1. It provides more timely public disclosure of the transaction.
2. It eliminates the annual Form 5 filing obligation for that transaction.

If an insider receives a small gift of shares in January and reports it on Form 4 with a V code in the same month, there is no Form 5 to file at year-end for that transaction. The V code signals to the market that the filing was voluntary, not required. This is a clean compliance strategy that the top-ranking pages on this topic do not explain.

Form 4 vs Form 5: Which Form for Which Transaction?

Use this decision framework when a specific transaction arises:

File Form 4 immediately (within two business days) if the transaction is:

• An open-market purchase or sale
• An equity grant, award, or option exercise
• A share withholding for tax at vesting (code F)
• A gift BY the insider
• A hedging or equity swap transaction
• Any other change in beneficial ownership not explicitly exempt

Form 5 deferral is permitted (due within 45 days of fiscal year-end) only if the transaction is:

• A purchase of less than $10,000 in a six-month period (small acquisition exemption)
• A gift TO the insider
• A transaction that was missed on Form 4 (delinquent, reported late)

Consider voluntary Form 4 (code V) instead of Form 5 if:

• The transaction is Form 5-eligible but you want to avoid the annual filing
• Earlier disclosure serves the company's transparency goals
• The compliance team prefers a single reporting workflow

Section 16(b) and the Short-Swing Profits Trap

One of the most consequential points in the Form 4 vs Form 5 comparison is what neither form can do: eliminate Section 16(b) liability.

As NASPP explains: "Form 4 is also the primary reporting mechanism used to enforce Section 16(b), which requires insiders to disgorge any profits realized from matching purchases and sales occurring within a six-month period (the 'short-swing profits recovery' provision)."

The disgorgement obligation runs from the transaction date, not the reporting date. An insider who defers a small acquisition to Form 5 and then sells within six months still owes short-swing profits from the date of the original purchase. Deferring the report to Form 5 does not reset the clock or reduce the liability. For the full calculation methodology, see Finrep's short-swing profit rule guide.

The 2026 NDAA: Foreign Private Issuers Are Now In Scope

The biggest change to the Section 16 reporting universe in decades took effect in 2026. As NASPP notes: "The 2026 National Defense Authorization Act eliminated the long-standing exemption from Section 16 reporting that previously applied to foreign private issuers."

FPI officers and directors who were previously outside the Form 3/4/5 regime are now subject to it. The statutory change is clear. Several implementation questions remain open, however, and SEC rulemaking or staff guidance is expected:

• Does Section 16(a) apply to 10% beneficial owners of FPIs, or only to officers and directors? The NDAA's scope on this point is not yet fully resolved.
• Does Section 16(b) short-swing profits recovery also apply to FPI insiders? If so, the consequences of matching purchases and sales within six months extend well beyond disclosure.

FPI compliance teams should not wait for final guidance before building Form 4 filing workflows. The two-business-day deadline applies regardless of whether implementation details are still being resolved. For a dedicated treatment of the FPI transition, see Finrep's foreign private issuer Section 16 exemption guide and the March 18, 2026 FPI deadline analysis.

Enforcement: What Late or Missed Filings Actually Cost

The SEC is direct on the consequences of intentional misstatements. The face of the March 2026 Form 4 states: "Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a)."

Beyond criminal exposure, the practical enforcement mechanisms are:

1. Proxy statement disclosure: Companies must name delinquent Section 16 filers in their annual proxy statement, including the number of late filings. This is public, searchable, and noticed by activist investors and proxy advisory firms.
2. Section 16(b) disgorgement: Short-swing profits must be returned to the company regardless of intent or reporting timing.
3. SEC civil action: The SEC actively pursues civil penalties for patterns of late or inaccurate filings.
4. Market surveillance: Form 4 filings are monitored in near-real time by analysts, activist funds, and journalists. A late filing or an amended filing draws attention.

Building the Internal Process to Hit the Two-Business-Day Deadline

The two-business-day Form 4 deadline is tight enough that compliance teams cannot rely on insiders to self-report. The standard operational failure is simple: the transaction happens, the compliance team is not notified, and the deadline passes before anyone files.

The internal workflow that prevents this:

1. Pre-clear all transactions. Require insiders to obtain compliance approval before executing any trade or accepting any equity award. Pre-clearance creates the notification event.
2. Connect directly to the broker. For open-market trades, establish a standing notification arrangement with the insider's broker so execution confirmations flow to the compliance team on trade date.
3. Calendar equity plan events. Grant dates, vesting dates, and option exercise windows are known in advance. Build Form 4 preparation into the equity plan calendar, not as a reactive step.
4. Set a one-business-day internal deadline. Filing on day two of the two-business-day window leaves no room for EDGAR technical issues. Target day one.
5. Track the deemed execution date. For derivative transactions and certain awards, the clock starts on the deemed execution date under Rule 16a-3(g), which may not be the calendar date of the grant or exercise. Confirm this date before starting the deadline count.
6. Assign a single owner. Ambiguity about whether legal, HR, or the equity plan administrator is responsible for filing is the most common process failure. One team owns the Form 4 queue.

For derivative securities specifically, the dual-entry requirements on Form 4 (Table I and Table II) add complexity that a separate workflow step should address. Finrep's Section 16 derivative securities guide covers that in detail.

FAQ

What is the difference between Form 4 and Form 5? Form 4 is the real-time insider transaction report, due within two business days of any change in beneficial ownership. Form 5 is the annual catch-all, due within 45 calendar days after fiscal year-end, and only required when at least one transaction was not previously reported on Form 4.

Do all insiders have to file Form 5 every year? No. Form 5 is only required when at least one transaction was unreported during the fiscal year, either because it was exempt from Form 4 or because it was missed. If all transactions were timely reported on Form 4, no Form 5 is required.

What transactions can be deferred to Form 5 instead of reported on Form 4? The two primary categories are: (1) small acquisitions of less than $10,000 in a six-month period, and (2) gifts received by the insider. Gifts given by the insider must go on Form 4 immediately.

Can a missed Form 4 be fixed on Form 5? Yes, delinquent transactions can be reported on Form 5. But the late filing must still be disclosed in the company's proxy statement, and Section 16(b) short-swing profit liability runs from the original transaction date regardless of when it is reported.

What is the 10b5-1 checkbox on Form 4? The March 2026 Form 4 includes a checkbox to indicate that a transaction was executed pursuant to a Rule 10b5-1(c) plan. Checking it signals the trade was pre-planned and provides an affirmative defense against insider trading claims. The Form 4 filing obligation remains regardless.

Are foreign private issuers now required to file Form 4? Yes. The 2026 National Defense Authorization Act eliminated the longstanding Section 16(a) exemption for foreign private issuers. FPI officers and directors are now subject to the Form 3/4/5 reporting regime. Open questions about 10% beneficial owners and Section 16(b) applicability are expected to be addressed by SEC guidance.