Form 144 Filing: What It Is, Who Must File, and Why It Exists
Form 144 is the SEC's pre-sale notice that corporate insiders must file before selling restricted or control securities under the Rule 144 safe harbor. It is not a post-trade report. It is a forward-looking declaration of intent, filed concurrently with placing the sell order, that puts the market on notice an insider plans to sell.
This article is the canonical reference for understanding what Form 144 is, why the SEC requires it, and the core concepts that underpin it. For the step-by-step EDGAR filing walkthrough, see Form 144 SEC Filing Instructions: 2026 Practitioner Walkthrough. For the Rule 144 volume calculation mechanics, see Rule 144 Volume Limitations: A 2026 Practitioner Walkthrough.
What Is a Form 144 Filing?
Form 144 is formally titled "Notice of Proposed Sale of Securities Pursuant to Rule 144 Under the Securities Act of 1933." It is filed on SEC Form 144 (SEC1147) and serves one purpose: to notify the SEC that an affiliate of a public company intends to sell restricted or control securities, and that the sale will be made under the exemption from registration provided by Rule 144.
The form is a notice, not a permission slip. Filing it does not guarantee the sale can proceed. It is the insider's representation that the Rule 144 conditions are met and that they have no undisclosed material adverse information about the issuer.
Key takeaway: Form 144 is forward-looking. It is filed before or at the moment of sale, not after. Compliance teams that treat it as a post-trade obligation are already non-compliant.
Why Does Form 144 Exist? The Rule 144 Safe Harbor
Under the Securities Act of 1933, any resale of securities is technically a distribution unless an exemption applies. Without an exemption, the seller is an "underwriter" and the sale requires SEC registration, which is expensive and slow.
Rule 144 (17 CFR §230.144) provides a safe harbor from that registration requirement for two categories of sellers:
- Affiliates selling any securities of the issuer (whether restricted or freely tradeable)
- Non-affiliates selling restricted securities after the applicable holding period
Form 144 is the mechanism through which affiliates document their compliance with that safe harbor. It creates a public record of the proposed sale, the volume, the broker, and the insider's certification that no material non-public information is being exploited.
The form also serves a market function. Because it is publicly searchable on EDGAR, investors and analysts use Form 144 filings as a leading indicator of insider selling sentiment, a dimension we cover below.
Restricted Securities vs. Control Securities: A Critical Distinction
This is the concept most practitioner guides skip, and it causes real compliance errors.
Restricted securities are securities acquired in unregistered, private transactions directly from the issuer or an affiliate. Common examples include shares received in a venture financing, a private placement, a PIPE transaction, or upon exercise of stock options. They carry a legend and cannot be freely resold without registration or an exemption.
Control securities are securities held by an affiliate of the issuer, regardless of how those shares were acquired. An affiliate is anyone in a relationship of control with the issuer, typically an officer, director, or beneficial owner of 10% or more of the voting stock.
The critical point: affiliates must comply with Rule 144 and file Form 144 even when selling freely tradeable shares they bought on the open market. Those shares are control securities the moment an affiliate holds them. The registration exemption they originally relied on to buy the shares is irrelevant to the resale.
| Security Type | Who Holds It | Rule 144 Required? | Form 144 Required? |
|---|---|---|---|
| Restricted securities | Non-affiliate (after holding period) | No (after 1 year for non-reporting issuers) | No |
| Restricted securities | Affiliate | Yes | Yes (if threshold met) |
| Control securities (freely tradeable) | Affiliate | Yes | Yes (if threshold met) |
| Freely tradeable shares | Non-affiliate | No | No |
Who Must File Form 144?
Form 144 must be filed by any affiliate of the issuer who proposes to sell securities under Rule 144 in excess of the filing threshold. Affiliates include:
- Officers and directors of the company
- Shareholders who beneficially own 10% or more of a class of voting securities
- Immediate family members sharing a household with any of the above
- Entities controlled by any of the above (trusts, LLCs, investment funds)
Non-affiliates who have held restricted securities for at least one year (for non-reporting company issuers) or six months (for reporting company issuers) and have not been affiliates during the prior three months generally do not need to file Form 144.
For venture capital and private equity funds, this is a live issue. A fund that owns more than 10% of a portfolio company's stock, or whose partner sits on the board, is an affiliate. Every proposed sale above the threshold requires a Form 144, and each entity and individual filer needs its own EDGAR credentials.
What Triggers a Form 144 Filing?
The filing obligation is triggered when the proposed sale exceeds 5,000 shares or units, OR has an aggregate sales price in excess of $50,000, during any rolling three-month period. Both thresholds are independent: crossing either one triggers the requirement.
These thresholds were set by the 2007 Rule 144 amendments (Release 33-8869), which raised them from the prior levels. They remain in effect as of 2026.
The aggregate market value used for the $50,000 test must be calculated as of a date within 10 days prior to the filing of the notice, per the official Form 144 instructions.
Sales by family members sharing a household and by entities the insider controls must be aggregated with the insider's own sales for purposes of this threshold and the Rule 144 volume limits. The Form 144 instructions explicitly reference Rule 144(a)'s definition of "person" and Rule 144(e)'s aggregation rules for this reason. Missing this aggregation is one of the most common compliance errors in practice.
What Rule 144 Conditions Underpin the Form 144?
Filing Form 144 is one condition of the Rule 144 safe harbor, not the only one. The full set of conditions that affiliates must satisfy includes:
- Current public information. Adequate current information about the issuer must be publicly available (generally satisfied by Exchange Act reporting companies that are current in their filings).
- Holding period. For restricted securities, the affiliate must have held the securities for at least six months (reporting company issuers) or 12 months (non-reporting company issuers), per the 2007 amendments. Control securities that are not restricted have no holding period requirement.
- Volume limitations. Sales in any three-month period cannot exceed the greater of 1% of the outstanding shares of the class or the average weekly reported trading volume over the preceding four weeks. For a detailed calculation walkthrough, see Rule 144 Volume Limitations: A 2026 Practitioner Walkthrough.
- Manner of sale. Sales must be made in brokers' transactions, directly with a market maker, or in riskless principal transactions. This determines which brokers can be named on the Form 144.
- Form 144 filing. The notice must be filed concurrently with placing the sell order (or before the sale if not made through a broker or market maker).
All five conditions must be met simultaneously. Form 144 is the paper trail for condition five, but a clean filing does not cure a failure on conditions one through four.
The Concurrent-Filing Rule: The Most Misunderstood Timing Requirement
Form 144 must be filed at the same time the sell order is placed with the broker, not after the sale executes. If the sale is not made through a broker or with a market maker, the form must be filed before the sale.
This is the most commonly misunderstood timing requirement in practice. Many insiders, and even some brokers, operate on the assumption that Form 144 is a same-day or next-day post-trade obligation. It is not. The official Form 144 instructions are unambiguous on this point.
A Form 144 is valid for 90 days from the date of filing. If the planned sale is not completed within that window, a new Form 144 must be filed before proceeding. This 90-day validity period is a practical trap for insiders whose sales are delayed by market conditions, blackout periods, or broker availability.
What Changed in 2022 and 2023: The EDGAR Mandate
For decades, Form 144 was a paper filing mailed to the SEC. That changed permanently with two SEC rulemakings:
- Release No. 33-11070 (adopted November 21, 2022, compliance date February 27, 2023): Mandated electronic filing of Form 144 on EDGAR for all issuers subject to Exchange Act Section 13 or 15(d) reporting requirements.
- Release No. 33-11159 (effective March 20, 2023): Extended the EDGAR filing window to 10:00 p.m. ET, with submissions made between 6:00 p.m. and 10:00 p.m. ET deemed filed the same business day.
The practical consequence: compliance teams that relied on brokers mailing paper forms to the SEC must now ensure every potential filer has active EDGAR credentials. As Cooley noted in its April 2023 client alert, the EDGAR code application process can take anywhere from one day to two weeks depending on the SEC's backlog, making early preparation essential.
One important carve-out: where the issuer is not subject to Exchange Act reporting requirements (a non-reporting company), Form 144 is still filed in accordance with Securities Act Rule 144(h)(2), not necessarily through EDGAR. This distinction is buried in the form instructions and absent from most practitioner guides.
Form 144 and the 10b5-1 Plan Connection
The intersection with Rule 10b5-1 trading plans became more significant after the SEC's 2022 amendments to Rule 10b5-1 (Release No. 33-11138), which took effect February 27, 2023.
If an insider has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1, the Form 144 must include the date of plan adoption or the date the instruction was given. This field is on the face of the current form.
The 2022 amendments also imposed cooling-off periods before the first trade under a new plan: 120 days for officers and directors (or until the next quarterly earnings release, whichever is later, up to 120 days), and 30 days for other persons. A single-trade plan is now limited to one per 12-month period. These constraints directly affect the timing and structure of sales that would be reported on Form 144.
For the full cooling-off period mechanics, see the 10b5-1 Plan Cooling-Off Period: 2026 Practitioner Walkthrough.
Form 144 vs. Form 4: Two Different Obligations for the Same Sale
This is a point that trips up compliance teams at reporting companies. Form 144 and Form 4 are distinct filings that may both be required for the same transaction.
| Form 144 | Form 4 | |
|---|---|---|
| Purpose | Pre-sale notice of proposed sale | Post-trade beneficial ownership report |
| Timing | Concurrent with placing sell order | Within 2 business days of transaction |
| Authority | Securities Act Rule 144 | Exchange Act Section 16(a) |
| Who files | Affiliates selling under Rule 144 | Section 16 insiders (officers, directors, 10%+ holders) |
| Filed on | EDGAR (Form 144) | EDGAR (Form 4) |
An officer who sells shares must file Form 144 before or at the time of the sale, and then file Form 4 within two business days of execution. The two filings serve different regulatory purposes and are not substitutes for each other. For the full Section 16 reporting picture, see Section 16 Insider Reporting Compliance Guide 2026.
Form 144 as a Market Intelligence Signal
Because Form 144 filings are publicly available on EDGAR and searchable in real time, they function as a market intelligence tool. Investors, journalists, and financial data services monitor Form 144 filings as a leading indicator of insider selling pressure.
A Form 144 signals intent, not completion. The insider is permitted but not required to sell within the 90-day window. Table II of the form, which discloses all sales by the insider in the prior three months, provides additional context on recent selling activity. For foreign private issuers, whose officers and directors are not required to file Form 4, Form 144 is often the only public record of insider selling activity.
This market-intelligence dimension is entirely absent from the top-ranking practitioner pages on this topic, yet it is directly relevant to IR teams and compliance officers who need to anticipate how a planned sale will be perceived.
What Happens If Form 144 Is Not Filed?
Failure to file, or filing after the sale rather than concurrently with the sell order, means the sale was not made in compliance with Rule 144. The seller loses the safe harbor and the sale may be treated as an unregistered distribution under the Securities Act. Purchasers may have rescission rights. The SEC can bring enforcement action.
Beyond the legal exposure, the reputational risk is real. An improperly timed or missing Form 144 that surfaces through an SEC comment letter or enforcement inquiry will appear on EDGAR and in press coverage.
For the Section 16 late-filing enforcement landscape, see SEC Late Filing Penalties: Section 16 Enforcement in 2026.
FAQ
What triggers a Form 144 filing? A proposed sale by an affiliate that exceeds 5,000 shares or units, or has an aggregate sales price above $50,000, during any rolling three-month period triggers the obligation. Both thresholds are independent: crossing either one is sufficient.
Who is responsible for filing Form 144? The affiliate for whose account the securities are to be sold is responsible. In practice, many insiders delegate the mechanics to their broker or a third-party filing agent, but the legal obligation rests with the insider. Each filing person needs their own EDGAR credentials.
What is Rule 144 in plain terms? Rule 144 is the SEC's safe harbor that lets corporate insiders and holders of restricted securities resell shares without registering the transaction, provided they meet specific conditions: adequate public information about the issuer, a minimum holding period for restricted securities, volume limits, proper manner of sale, and (for affiliates) filing Form 144. Without Rule 144, most insider sales would require a full SEC registration.
Does Form 144 replace Form 4? No. Form 144 is a pre-sale notice under the Securities Act. Form 4 is a post-trade beneficial ownership report under Exchange Act Section 16(a). An officer or director selling shares under Rule 144 must file both: Form 144 at the time of the sell order, and Form 4 within two business days of execution.
Are Form 144 filings public? Yes. All Form 144 filings for reporting-company issuers are filed on EDGAR and are publicly searchable the same day they are submitted (for filings made before 10:00 p.m. ET).
Does Form 144 apply to non-reporting company issuers? The Rule 144 filing requirement still applies, but the form is not filed on EDGAR. For issuers not subject to Exchange Act Section 13 or 15(d) reporting, Form 144 is filed in accordance with Securities Act Rule 144(h)(2), which specifies a different filing path.
