Form 144 Explained: Reading Planned Insider Sales
By Chad Hartman
Published · Last updated
Before an executive's stock sale shows up as a completed Form 4 transaction, in most cases there is an earlier filing that told the market the sale was coming — the order placed, the share count, the approximate date. That filing is Form 144, and almost nobody reads it. The Form 4 — the after-the-fact record of what already happened — is the version that gets attention. Form 144 is the notice that comes first: a public, dated statement of intent to sell, filed before the trade executes rather than after.
Form 144, formally the Notice of Proposed Sale of Securities Pursuant to Rule 144, is what corporate insiders and other affiliates file when they plan to sell restricted or control securities above a specific size threshold. It answers a question Form 4 cannot: not what an insider just did, but what an insider is about to do. Our SEC filings guide covers Form 144 in a single paragraph as part of the full filing landscape — this guide is the deeper version, covering the thresholds and timing traps, how it differs from Form 4, and how to find any insider's Form 144 history on EDGAR.
Table of Contents
- What Is Form 144?
- Who Has to File Form 144?
- The Thresholds and Timing
- What Form 144 Tells You That Form 4 Cannot
- What a Form 144 Doesn't Guarantee
- Step 1: Search EDGAR for Form 144 Filings
- Step 2: Match the Filer to Their Form 4 History
- Step 3: Watch the 90-Day Window
- Reading Form 144 Alongside GeminIQ's Insider Data
- Frequently Asked Questions
What Is Form 144?
Form 144 is the notice a company affiliate files with the SEC before selling restricted or control securities in reliance on Rule 144 — the safe harbor that lets otherwise unregistered shares be resold into the public market without a full Securities Act registration. Filing Form 144 does not authorize the sale by itself. It is a disclosure obligation layered on top of a sale the affiliate has already decided — and is legally permitted — to make.
Restricted securities are typically shares acquired directly from the company or in a private transaction — pre-IPO equity, shares from a private placement, founder stock — that were never registered for public resale. Control securities are shares held by an affiliate, regardless of how they were originally acquired, simply because that person's relationship to the company gives them influence over it. An executive's open-market-purchased shares can be control securities for Rule 144 purposes even though they were bought like any other investor's shares, purely because of who is holding them.
Who Has to File Form 144?
Form 144 applies to affiliates: executive officers, directors, and beneficial owners of more than 10% of a company's outstanding shares — the same population that files Section 16 reports on Forms 3, 4, and 5. Immediate family members of an affiliate, and entities the affiliate controls, are typically swept in as well when they hold or sell the affiliate's securities.
Non-affiliates are generally exempt from filing, even when selling restricted securities, once they've cleared the applicable Rule 144 holding period. That asymmetry is the point of the rule. An affiliate's sale carries more informational significance to the market than an equivalent sale by an outside investor with no relationship to the company, so the affiliate's sale gets a public notice requirement the outside investor's does not.
The Thresholds and Timing
Not every affiliate sale triggers a Form 144. The filing is required only when the amount sold during any rolling three-month period exceeds 5,000 shares or $50,000 in aggregate sale price — whichever threshold the sale reaches first. A sale of 4,000 shares clears neither threshold on its own and requires no Form 144. A sale of 5,001 shares does, regardless of price.
Timing is where the filing requirement is easy to misjudge: Form 144 is not filed after the sale, and it is not filed a comfortable buffer of days in advance. It must be filed concurrently with placing the sell order with a broker, or with executing the sale directly with a market maker, under Rule 144(h)(3). The affiliate then has 90 days from that filing date to actually complete the sale. If the securities aren't sold within the window, the notice expires and a new Form 144 is required before selling any remaining shares.
Filing itself became fully electronic on April 13, 2023. Before that date, Form 144 was almost always filed on paper or by email directly to the SEC, not published to EDGAR in the same structured, immediately searchable way Form 4 has been for years. That single rule change is why Form 144 only recently became usable at all as a public research tool, rather than a compliance formality buried in SEC paper files.
What Form 144 Tells You That Form 4 Cannot
The two forms cover the same population of people and often the same shares, but they answer different questions at different points in time. Form 144 is filed at or before the moment the sell order goes in — a statement of intent, filed on the affiliate's own estimate of what they plan to sell and by when. Form 4 is filed within two business days after a transaction actually executes, and it reports what happened, not what was planned.
That gap between intent and execution is where Form 144 earns its place as a real leading indicator. A large Form 144 filing tells you a sale of a specific approximate size is coming within the next 90 days, before the market has any confirmed record that it occurred. The eventual Form 4 — more precisely, the S transaction code on that Form 4 — is where you find out whether the plan was executed in full, partially, or not at all. Reading Form 144 without eventually cross-checking the corresponding Form 4 tells you what an insider intended. Reading Form 4 without ever having seen the Form 144 tells you what happened, with no visibility into how far in advance the decision became public.
| Form 144 | Form 4 | |
|---|---|---|
| What it reports | A proposed sale — a statement of intent | A transaction that has already executed |
| Timing | Filed concurrently with placing the sell order with a broker, or executing with a market maker, under Rule 144(h)(3) | Filed within two business days after the transaction executes |
| Who files | Affiliates: officers, directors, and beneficial owners above 10% | The same Section 16 population |
| Size threshold | Required only above 5,000 shares or $50,000 in any rolling three-month period | No size threshold |
| What it tells you | A sale of a specific approximate size is coming within the next 90 days | Whether the sale executed, and at what price |
| If the sale never happens | The notice simply expires at 90 days — no amendment or explanation required | No filing exists at all; the absence is the only record |
What a Form 144 Doesn't Guarantee
Filing a Form 144 does not obligate the affiliate to actually sell. The 90-day window can lapse with the shares never sold, and no amendment or explanation is required when that happens — the notice simply expires. An affiliate who changes their mind, or whose broker never executes the order because a price target isn't met, leaves no separate record that the planned sale didn't happen. The only way to know is the absence of a matching Form 4 within the window, which requires actively checking rather than assuming.
Volume is also capped, not just noticed. Under Rule 144(e), an affiliate's sales of an exchange-listed reporting company's stock in any three-month period generally cannot exceed the greater of 1% of the company's total outstanding shares or the average weekly trading volume over the four calendar weeks preceding the filing. A Form 144 that names a share count near that ceiling is disclosing close to the maximum the affiliate is legally permitted to sell in the period, which caps the pace of an exit even for an affiliate looking to sell everything at once.
Finding an insider's Form 144 filings takes the same EDGAR workflow as pulling their Form 4 history, now that the form is filed electronically.
Step 1: Search EDGAR for Form 144 Filings
Use SEC EDGAR's company or person search and filter by form type 144. Because Form 144 has been disseminated alongside Section 16 ownership filings since electronic filing became mandatory on April 13, 2023, it now surfaces in the same search flow used to pull a company's Form 3, 4, and 5 history rather than sitting in a separate paper archive.
Step 2: Match the Filer to Their Form 4 History
Cross-reference the affiliate's name against their own Form 4 filing history for the 90 days following the Form 144's filing date. A matching S transaction confirms the planned sale executed; its absence means the notice expired unfulfilled.
Step 3: Watch the 90-Day Window
Note the filing date and count 90 days forward. Any completed sale tied to that specific Form 144 has to land inside that window — a Form 4 sale that shows up well outside it belongs to a separate, later notice, not the one you started with.
Reading Form 144 Alongside GeminIQ's Insider Data
GeminIQ's Insider Transactions feature is built on Form 4 and Form 5 data — the completed, executed transactions insiders actually made, with the transaction code, price, and post-transaction holding preserved exactly as filed. Form 144 sits one step earlier in that chain, and it isn't part of that dataset — for the same structural reason SEC comment letters aren't part of GeminIQ's financial statement data. A notice of proposed sale is a forward-looking statement of intent, not a completed, comparable transaction record.
That makes Form 144 a complementary research step, not a redundant one. Pulling an affiliate's Form 144 filings directly from EDGAR before reviewing their Insider Transactions history on GeminIQ tells you what to watch for over the following 90 days. Once the window closes, the completed sale, if it happened, shows up on GeminIQ exactly as it was reported on the eventual Form 4 — the notice of intent and the completed record, checked against each other rather than read alone.
Frequently Asked Questions
Does everyone selling company stock have to file Form 144?
No. Only affiliates — officers, directors, and beneficial owners above 10% — filing sales of restricted or control securities above the threshold have to file. Even affiliates are exempt below 5,000 shares or $50,000 in a rolling three-month period.
Is a Form 144 filing a guarantee the sale will happen?
No. It's a notice of intent filed at the time the sell order is placed, and the 90-day window can lapse without a matching sale ever showing up on a Form 4. Checking for that matching Form 4 is the only way to confirm the sale actually executed.
How is Form 144 different from a Rule 10b5-1 trading plan disclosure?
They can overlap but aren't the same thing. A 10b5-1 plan is a pre-scheduled trading arrangement disclosed in Form 4 footnotes once transactions execute under it. Form 144 is the separate notice of proposed sale required once the size threshold is crossed, whether or not the underlying sale is part of a 10b5-1 plan.
When did Form 144 become searchable on EDGAR like other insider filings?
Electronic filing became mandatory on April 13, 2023. Before that, most Form 144s were paper or email filings to the SEC rather than structured, immediately searchable EDGAR records.
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Disclaimer: The content in this blog is for educational and entertainment purposes only and does not constitute financial, legal, or tax advice. Investing involves risk, including the loss of principal. The views expressed are my own and not intended as financial advice or a guarantee of future performance.