Verastem (NASDAQ: VSTM) insider sale notice — 20,871 shares proposed

Rhea-AI Filing Summary

Verastem, Inc. filed a Form 144 notifying a proposed sale of 20,871 shares of Common Stock. The filing shows a prior sale of 806 shares on 05/04/2026 and lists 87,873,639 shares outstanding as of 06/22/2026.

Insights

Corporate Governance Analyst

Routine insider resale notice; limited market signal.

The filing indicates a proposed resale of 20,871 shares of Common Stock and records a sale of 806 shares on 05/04/2026. These notifications are administrative; they disclose intent to sell but do not by themselves change ownership metrics beyond the cited sales.

Examples shown in the excerpt include the prior sale by Dan Paterson. Timing and cash‑flow treatment for the proposed sale are not specified in the provided excerpt; subsequent broker reports or transaction confirmations would show execution details.

Key Figures

Proposed resale: 20,871 shares Recent sale: 806 shares Shares outstanding: 87,873,639 shares +1 more

4 metrics

Proposed resale 20,871 shares Form 144 "Securities To Be Sold" entry

Recent sale 806 shares Securities sold during the past 3 months on 05/04/2026

Shares outstanding 87,873,639 shares Listed in excerpt with date 06/22/2026

RSU vesting 20,871 shares Vesting of restricted stock unit award on 06/18/2024

Key Terms

Form 144, restricted stock unit, shares outstanding

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

restricted stock unit financial

"Vesting of restricted stock unit award"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

shares outstanding financial

"87873639 | 06/22/2026"

Shares outstanding are the total number of a company’s stock units held by all shareholders, including institutional investors and company insiders — think of them as the total number of slices of the company’s ownership pie. Investors use this number to calculate how much of the company each share represents, and it directly affects per-share measures like earnings per share, ownership percentage and valuation; when the slice count changes, an investor’s claim and the company’s per-share metrics change too.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Shareworks by Morgan Stanley 600 - 3 Avenue SW Suite 1500 Calgary A0 T2P0G5	20871	87241.00	87873639	06/22/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/18/2024	Vesting of restricted stock unit award	Verastem, Inc.			20871	06/18/2024	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Dan Paterson 117 Kendrick Street Suite 500 Needham MA 02494	Verastem, Inc.	05/04/2026	806	4468.06

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

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. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Verastem's Form 144 report for VSTM?

It reports a proposed sale of 20,871 common shares. The filing also records a prior sale of 806 shares on 05/04/2026 and shows shares outstanding of 87,873,639 as of 06/22/2026.

Who is named in the filing and did they recently sell shares?

The excerpt names Dan Paterson and records a sale of 806 shares. The sale date shown is 05/04/2026. The filing also lists a proposed resale amount of 20,871 shares.

Does the filing show any restricted stock activity for VSTM?

Yes — the excerpt shows vesting of an RSU award for 20,871 shares. The vesting date recorded is 06/18/2024, tied to Common Stock held through Shareworks by Morgan Stanley.

How many shares outstanding does the filing list for Verastem?

The excerpt lists 87,873,639 shares outstanding as of 06/22/2026. This figure appears alongside the securities and exchange information in the filing excerpt provided.