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What is Form 144?

Form 144 is the SEC notice that an affiliate of an issuer files when they plan to sell restricted or control securities under Rule 144. It is filed before the sale, not after, which makes it a forward-looking signal.

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The short answer

Form 144 announces *intent* to sell. The seller files it before placing the sale order with their broker. The filing then provides safe harbor under Rule 144, which permits certain sales of restricted or control securities that would otherwise require registration with the SEC.

The companion filing, Form 4, reports the sale *after* it executes. The same trade can trigger both.

Who has to file Form 144

Anyone who is selling restricted or control securities, where:

  • Restricted securities are securities acquired in private transactions (employee stock grants, private placements, M&A consideration, etc.) that are not yet freely tradable.
  • Control securities are securities held by an "affiliate" of the issuer, typically officers, directors, and 10% holders.

In practice, most Form 144 filings come from executives selling vested shares, since their shares are control securities even if not technically restricted.

A Form 144 is required when the proposed sale exceeds either 5,000 shares or $50,000 in any three-month period. Smaller sales are exempt.

What's in a Form 144

  • Cover page, issuer name, ticker, broker handling the sale.
  • Securities to be sold, number of shares, approximate aggregate market value, approximate date of sale.
  • Securities sold during the past three months, required because the volume limitation under Rule 144 looks back three months.
  • Remarks, usually empty, but can include reference to a Rule 10b5-1 plan or explanation of an unusual transaction.
  • Signature, the seller signs.

Form 144 is short. The most-read fields are the share count, approximate aggregate market value, and the approximate sale date.

When Form 144 is filed

Before the sale. The filing is conventionally made on the same day the sale order is given to the broker. Once filed, the seller has 90 days to complete the sale; if they don't, they must refile.

How Form 144 differs from Form 4

| | Form 144 | Form 4 | |---|---|---| | Timing | Before sale (intent) | After sale (actual) | | Triggers | Sale by affiliate of restricted/control stock above threshold | Any Section 16 insider transaction | | Threshold | >5,000 shares OR >$50,000 in 3 months | Any reportable transaction | | Filing path | Mailed to SEC (historically); now EDGAR e-filing | EDGAR e-filing | | Realtime value | Forward-looking signal | Backward-looking confirmation |

For more on the comparison see Form 4 vs Form 144.

Why traders watch Form 144

The forward-looking nature is the whole reason. A Form 144 says "an insider intends to sell up to X shares in the next 90 days." That's a different piece of information than "an insider sold X shares yesterday."

Use cases:

  • Detecting planned sales early. Before the Form 4 hits, the Form 144 already announced intent.
  • Estimating supply pressure. Sum the aggregate market value of pending Form 144 filings to estimate near-term insider supply.
  • Cross-checking with 10b5-1 plans. Many Form 144 filings reference a 10b5-1 plan, which contextualizes the sale as pre-arranged rather than discretionary.
  • Confirming or contradicting reported sales. The Form 4 that follows should match (or be smaller than) the Form 144 announcement.

The Form 144 + Form 4 sequence

Typical lifecycle for an officer selling vested RSUs under a 10b5-1 plan:

  1. Officer adopts a 10b5-1 plan in January, with a sale of 50,000 shares scheduled for June.
  2. In late June, the officer (via their broker) files Form 144 announcing intent to sell up to 50,000 shares.
  3. The sale executes over the next few days.
  4. Within 2 business days of execution, the officer files Form 4 reporting the actual sale.

Both filings reference the underlying 10b5-1 plan in their footnotes, tying the lifecycle together.

Getting Form 144 data via API

curl "https://api.edgarkit.com/v1/filings?form_type=144&ticker=NVDA&limit=10" \
  -H "Authorization: Bearer YOUR_API_KEY"

Returns the most recent Form 144 filings for Nvidia. Each filing includes the proposed share count, aggregate market value, approximate sale date, and any 10b5-1 plan reference.

For a daily summary of all Form 144 filings above a dollar threshold:

curl "https://api.edgarkit.com/v1/filings?form_type=144&min_value=500000&since=2026-06-12" \
  -H "Authorization: Bearer YOUR_API_KEY"

Common mistakes

  • Treating Form 144 as the actual sale. It is announcement only. The sale may execute at a different price, in pieces, or not at all (if the seller changes their mind within the 90-day window).
  • Counting Form 144 and Form 4 separately. They often describe the same underlying trade. Don't double-count insider supply.
  • Ignoring the 10b5-1 reference. A Form 144 sale under a 10b5-1 plan was scheduled months earlier and carries weaker bearish signal than a discretionary sale.
  • Assuming all officer sales require Form 144. Sales below the threshold (under 5,000 shares and under $50,000 in three months) don't require a Form 144 even if they require a Form 4.

FAQ

Is Form 144 filed before or after the sale?

Before. The seller files Form 144 to announce intent; they then have 90 days to complete the sale. After execution they file Form 4 to report the actual trade.

Does every insider sale require a Form 144?

No. Form 144 is required when selling restricted or control securities above either 5,000 shares or $50,000 in any three-month period. Smaller sales are exempt from Form 144 but may still require a Form 4 if the seller is a Section 16 insider.

What happens if the sale doesn't execute within 90 days?

The Form 144 expires. The seller must refile if they still want to sell.

Can a Form 144 be amended?

Yes, but it's rare. More commonly, if the original sale doesn't go through, the seller files a new Form 144 instead of amending the old one.

How do I match Form 144 to the eventual Form 4?

Match by issuer CIK and reporter CIK, then look for a Form 4 with a transaction code S and a date within 90 days of the Form 144 filing date. The Form 4's share count should be at or below the Form 144's announced amount.