Verastem officer plans $353K share sale for taxes

The notice says the planned sale is intended to cover withholding taxes upon vesting of restricted stock unit awards.

Rhea-AI Filing Summary

Verastem, Inc. officer and director Dan Paterson reported a planned sale of 44,121 common shares on October 1, 2026, with an aggregate market value of $353,047. The shares are to be sold to cover withholding taxes upon vesting of restricted stock unit awards. The notice also lists 1,302 shares sold during the prior three months for $7,565.

Key Figures

Shares planned for sale: 44,121 common shares Aggregate market value: $353,047 Shares outstanding: 90,563,441 shares +2 more

5 metrics

Shares planned for sale 44,121 common shares Approximate sale date: October 1, 2026

Aggregate market value $353,047 Shares planned for sale

Shares outstanding 90,563,441 shares Reported in the securities information section

Shares sold 1,302 shares Sales during the past three months

Aggregate value of shares sold $7,565 Sales during the past three months

Key Terms

Rule 144, restricted stock unit award, withholding taxes, aggregate market value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock unit award technical

"Vesting of restricted stock unit award"

A restricted stock unit award is a promise by a company to give an employee a specified number of company shares at a future date if certain conditions are met, such as staying with the company or hitting performance goals. For investors, these awards matter because they can increase the total number of shares outstanding when converted, diluting existing holders, and they align employees’ incentives with shareholders’ interests much like giving a rising bonus that becomes real only after conditions are satisfied.

withholding taxes financial

"Shares to be sold to cover withholding taxes"

Withholding taxes are amounts a payer or government takes out of payments — such as wages, interest, or dividends — before the recipient gets the money, functioning like a cashier keeping part of a bill to pay taxes on your behalf. For investors this matters because it reduces the cash they actually receive, affects net returns and yield calculations, and may require additional paperwork or treaty claims to recover or offset the withheld amount against final tax bills.

aggregate market value financial

"353047.00"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many VSTM shares did Dan Paterson plan to sell?

Dan Paterson, identified as a Verastem officer and director, reported a planned sale of 44,121 common shares on October 1, 2026, with an aggregate market value of $353,047. The stated purpose is to cover withholding taxes upon vesting of restricted stock unit awards.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/01/2026 - 06:56 PM Accepted by SEC EDGAR 10/01/2026 - 06:55 PM Learn about SEC filing dates

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	0001563202
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Verastem, Inc.
SEC File Number	001-35403
Address of Issuer	117 Kendrick Street, Suite 500 Needham MASSACHUSETTS 02494
Phone	781-292-4200
Name of Person for Whose Account the Securities are To Be Sold	Dan Paterson
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	Officer, Director

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	44121	353047.00	90563441	10/01/2026	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	01/21/2026	Vesting of restricted stock unit award	Verastem, Inc.			44121	01/21/2026	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.	08/03/2026	1302	7565.00

144: Remarks and Signature

Remarks	Shares to be sold to cover withholding taxes upon vesting of restricted stock unit awards
Date of Notice	10/01/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	10/01/2026
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	/s/ Daniel Calkins, attorney-in-fact
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)