Form 144 Explained: What It Is, Who Files It, and Why

Form 144 is the SEC's advance notice of a proposed insider stock sale, a public declaration, filed on EDGAR, that a corporate insider intends to sell restricted or control securities under the safe harbor provided by Rule 144 of the Securities Act of 1933. It is not an approval, a registration, or a green light from the SEC. It is a notice, and the distinction matters enormously for compliance.

This article is the canonical reference for finance professionals, compliance officers, and legal counsel who need to understand what Form 144 is, why it exists, and how it fits into the Rule 144 framework. For step-by-step EDGAR filing instructions, see the Form 144 SEC Filing Instructions: 2026 Practitioner Walkthrough. For a side-by-side comparison of the form and the rule, see Form 144 vs. Rule 144.

What Is Form 144?

Form 144, officially titled "Notice of Proposed Sale of Securities," is the filing a corporate affiliate must submit to the SEC before selling restricted or control securities in the public market. It is required under Rule 144(h) of the Securities Act of 1933 and must be filed concurrently with placing the sell order, or before.

The form captures:

• The issuer's identity and SEC file number
• The seller's name and relationship to the issuer (officer, director, 10% stockholder)
• The class, volume, approximate sale date, and market value of securities to be sold
• The broker through whom the sale will be executed
• How the securities were originally acquired (Table I)
• All sales of the issuer's securities by the seller in the prior three months (Table II)
• A representation that the seller has no knowledge of material non-public information (MNPI)
• If applicable, the date a Rule 10b5-1 trading plan was adopted

The SEC's Form 144 (SEC1147, revised July 2022) carries an OMB-estimated average burden of 1.0 hour per response. That estimate understates the compliance work for most practitioners, but it signals the form's intended scope: a structured disclosure, not a complex registration document.

Why Does Form 144 Exist?

Form 144 exists because restricted and control securities were never registered for public sale. Restricted securities are acquired in private transactions, such as private placements or employee stock grants, without a registration statement. Control securities are held by affiliates regardless of how they were acquired. Neither category can be freely resold without either registering the sale or qualifying for an exemption.

Rule 144 provides that exemption, the safe harbor. Form 144 is the procedural mechanism that makes the exemption transparent. By requiring public disclosure before the sale, the SEC achieves two goals:

1. Market transparency: investors and analysts can see that an insider intends to sell, giving the market time to process that signal.
2. Deterrence: the public nature of the filing creates accountability. An insider who signs Form 144 represents, on the face of the document, that they have no MNPI about the issuer's current and prospective operations that has not been publicly disclosed. A false representation carries securities fraud exposure.

Key takeaway: Filing Form 144 does not create the exemption. Rule 144 does. The form is the notice; the rule is the substance. An insider who files Form 144 but fails to satisfy Rule 144's other conditions has no valid exemption and may be selling in violation of the Securities Act.

Who Must File Form 144?

Affiliates of the issuer must file Form 144 before selling restricted or control securities, but only when the sale exceeds specific thresholds. Rule 144(h) sets those thresholds clearly: the form is required when the amount to be sold in any three-month period exceeds 5,000 shares or units OR has an aggregate sale price exceeding $50,000. Below both thresholds, no Form 144 is required even if the seller is relying on Rule 144.

Who Qualifies as an Affiliate?

An "affiliate" under Rule 144(a)(1) is any person who directly or indirectly controls, is controlled by, or is under common control with the issuer. In practice, this means:

• Officers and directors of the issuer
• Shareholders holding more than 10% of a class of equity securities
• Entities controlled by any of the above

The definition is facts-and-circumstances based. A former officer who left the company within the past 90 days is still treated as an affiliate for Rule 144 purposes. The SEC's Compliance and Disclosure Interpretations on Securities Act Rules are the primary reference for edge cases.

What About Non-Affiliates?

Non-affiliates face a dramatically different regime. Once a non-affiliate has held restricted securities of a reporting company for at least six months, they may sell subject only to the current public information requirement. After one year, they may sell freely with no Rule 144 conditions at all, including no Form 144. For non-reporting company issuers, the thresholds are one year and two years respectively. Non-affiliates who qualify under these rules have no Form 144 obligation.

Rule 144 vs. Form 144: The Core Distinction

This is the single most common source of compliance confusion. Rule 144 is the substantive exemption; Form 144 is the procedural notice. They are not interchangeable.

Rule 144 establishes five independent conditions that must all be satisfied for the safe harbor to apply:

1. Current public information: adequate public information about the issuer must be available, meaning the issuer is current on its Exchange Act reporting obligations.
2. Holding period: restricted securities must be held for at least six months (reporting company issuers) or one year (non-reporting company issuers) from the date they were fully paid for.
3. Volume limitations: affiliates may sell no more than the greater of 1% of the outstanding shares of the class, or the average weekly reported trading volume during the four calendar weeks preceding the Form 144 filing (for exchange-listed securities). For OTC securities, only the 1% test applies.
4. Manner of sale: sales must be executed as ordinary brokerage transactions or directly with a market maker.
5. Filing of Form 144: required for sales above the 5,000 share or $50,000 threshold.

Satisfying condition five (filing the form) does not satisfy conditions one through four. An insider who files Form 144 but has not met the holding period has no exemption. The form is necessary but not sufficient. For a detailed treatment of the volume calculation, see Rule 144 Volume Limitations: A 2026 Practitioner Walkthrough.

What Changed in 2023: The EDGAR Electronic Filing Mandate

Effective May 2, 2023, all Form 144 filings must be submitted electronically via EDGAR. The SEC adopted this requirement in Release No. 33-11070 (November 2022), ending decades of paper filing for affiliates of non-reporting companies and other filers who previously had that option.

Before May 2, 2023, affiliates of Exchange Act reporting companies already filed on EDGAR, but affiliates of non-reporting companies could file on paper. That paper pathway is now closed. Every Form 144 filer, regardless of the issuer's reporting status, must have EDGAR access codes (a CIK and CCC) and file electronically.

One practical point that trips up first-time filers: the CIK used for the Form 144 filing is the individual insider's CIK, not the issuer's CIK. As Workiva's EDGAR filing documentation states explicitly: "The Filer Information should be the individual's CIK and CCC and not the Issuer's." Using the wrong CIK is one of the most common EDGAR submission errors on Form 144.

The SEC also extended EDGAR filing hours for Form 144. As of March 20, 2023, a submission made between 6 p.m. and 10 p.m. ET is deemed filed on the same business day. EDGAR is unavailable after 10 p.m. ET.

The MNPI Representation: What You Sign When You File

Every Form 144 carries a mandatory representation in the signature block. The filer attests, in the SEC's own words:

"The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed." , Form 144, Attention section (SEC Form SEC1147)

This is not boilerplate. Signing Form 144 while in possession of MNPI could expose the filer to securities fraud liability under Section 10(b) of the Exchange Act and Rule 10b-5. Compliance officers building pre-clearance programs should treat this representation as a hard gate: no Form 144 filing until the insider has affirmatively confirmed they hold no MNPI.

The Rule 10b5-1 Plan Disclosure

The December 2022 SEC amendments to Rule 10b5-1 (Release No. 33-11138, effective February 27, 2023) added a new disclosure requirement directly on Form 144. If the seller is relying on a Rule 10b5-1 trading plan, the form now requires disclosure of the date the plan was adopted or the date trading instructions were given.

This field matters for two reasons. First, it creates a public record linking the sale to a specific plan adoption date, which regulators and market participants can use to assess whether the plan was adopted in compliance with Rule 10b5-1's conditions. Second, the 2022 amendments imposed new cooling-off periods: 120 days (or until the next quarterly earnings release, whichever is later) for officers and directors, and 30 days for other insiders, between plan adoption and the first trade. A Form 144 filed before the cooling-off period has expired signals a potential compliance problem.

For a full treatment of how 10b5-1 plans interact with insider trading compliance, see the 10b5-1 Plan Adoption Requirements: 2026 Practitioner Walkthrough.

The 90-Day Window and Table II Aggregation

Two operational rules catch practitioners off guard more than any others.

The 90-day window. Form 144 covers a proposed sale. As the SEC's investor.gov glossary states, "A person filing a Form 144 must have a bona fide intention to sell the securities referred to in the Form within a reasonable time after the filing of the Form." If the sale does not occur within 90 days, a new Form 144 must be filed before proceeding. The form does not roll over automatically.

Table II aggregation. Table II requires disclosure of all sales of the issuer's securities in the past three months, not just the filer's own sales. The instructions require aggregation of sales by all persons whose sales must be counted together under Rule 144(e). This includes:

• Family members sharing the same household
• Trusts controlled by the filer
• Entities controlled by the filer

Failing to aggregate these sales understates the three-month volume and can cause the filer to exceed the Rule 144 volume limit without realizing it. The electronic Form 144 on EDGAR accommodates up to 200 entries in the Securities Sold In The Last Three Months sheet, so the technical capacity is not the constraint. The discipline to identify and include all aggregated sellers is.

What Form 144 Signals to the Market

Form 144 filings are public the moment they are accepted by EDGAR. Data vendors, journalists, and institutional investors monitor them in real time as a leading indicator of insider selling intent. A cluster of Form 144 filings from multiple executives at the same company can move the stock price before a single share is sold.

This market perception dimension is a real concern for IR teams and CFOs. The filing is not just a compliance checkbox; it is a public statement about insider intentions. Timing, volume, and the relationship of the sale to recent corporate events all become part of the narrative the market constructs. Accurate, timely filing protects the company's credibility as much as the insider's legal standing.

You can search all Form 144 filings on EDGAR's full-text search system. Contact information (name, phone, email) is redacted from the publicly disseminated version; the SEC sees it, but the market does not.

FAQ

What is a Form 144 filing? Form 144 is a notice filed with the SEC by a corporate affiliate (officer, director, or 10%+ shareholder) who intends to sell restricted or control securities under the Rule 144 safe harbor. It must be filed concurrently with placing the sell order, or before, and is required only when the proposed sale exceeds 5,000 shares or $50,000 in aggregate value in any three-month period.

What is the difference between Form 144 and Rule 144? Rule 144 is the substantive exemption from Securities Act registration requirements. Form 144 is the procedural notice that supports one of Rule 144's five conditions. Filing the form does not satisfy the other four conditions (holding period, volume limits, current public information, manner of sale). For a full comparison, see Form 144 vs. Rule 144.

What is the deadline for filing Form 144? Form 144 must be filed no later than the time the sell order is placed with the broker. It cannot be filed after the fact. If the sale does not occur within 90 days of filing, a new Form 144 is required before the sale can proceed.

What is the difference between Form 144 and Form 144A? These are unrelated instruments. Form 144 is the SEC notice for proposed insider sales under Rule 144. Rule 144A is a separate SEC rule that permits resale of restricted securities to qualified institutional buyers (QIBs) without SEC registration. They address different transactions and different seller categories.

Does a non-affiliate ever need to file Form 144? Generally, no. Non-affiliates who have satisfied the applicable holding period (six months for reporting company issuers, one year for non-reporting company issuers) and meet Rule 144's other conditions may sell without filing Form 144. After one year (reporting company) or two years (non-reporting company), non-affiliates face no Rule 144 conditions at all.

What happens if I sign Form 144 while holding MNPI? The signature block on Form 144 is a legal representation that the filer has no knowledge of material adverse non-public information about the issuer. Signing falsely could expose the filer to securities fraud liability under Section 10(b) and Rule 10b-5. Pre-clearance programs should require an affirmative MNPI confirmation before any Form 144 is submitted.