Verastem director sells 283 shares to cover tax withholding

Verastem, Inc. director reports small stock sale for tax withholding A director of Verastem, Inc. (VSTM) reported the sale of 283 shares of common stock on 12/16/2025 at a price of $9.14 per share.

Rhea-AI Filing Summary

Verastem, Inc. director reports small stock sale for tax withholding

A director of Verastem, Inc. (VSTM) reported the sale of 283 shares of common stock on 12/16/2025 at a price of $9.14 per share. After this transaction, the reporting person beneficially owns 41,678 shares of Verastem common stock in direct ownership. According to the footnote, the sale was made to cover statutory tax withholding obligations related to the vesting of restricted stock units, rather than as a discretionary open-market sale.

Insider Trade Summary

Net Seller: 283 shares

Net Sell 1 txn

Insider Gagnon Robert E.

Role Director

Sold 283 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Common Stock	283	$9.14	$3K

Holdings After Transaction: Common Stock — 41,678 shares (Direct)

Footnotes (1)

1. F1. The sale reported on this Form 4 represents shares sold by the Reporting Person to satisfy statutory withholding requirements in connection with the vesting of restricted stock units.

FAQ

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

What insider transaction did Verastem (VSTM) report in this filing?

A Verastem, Inc. director reported selling 283 shares of common stock on 12/16/2025 at $9.14 per share.

Why were Verastem (VSTM) shares sold by the director?

The filing states the 283-share sale was made to satisfy statutory withholding requirements in connection with the vesting of restricted stock units.

How many Verastem (VSTM) shares does the insider own after the transaction?

Following the reported sale, the director beneficially owns 41,678 shares of Verastem common stock in direct ownership.

What is the insider’s relationship to Verastem (VSTM)?

The reporting person is identified as a Director of Verastem, Inc.

Was this Verastem (VSTM) insider transaction filed by one or multiple reporting persons?

The document indicates it is a Form filed by One Reporting Person, not a joint filing.

Does this Verastem (VSTM) insider sale relate to derivative securities?

The table of derivative securities shows no derivative transactions reported for this event; only the 283-share common stock sale is listed.

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

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Accepted by SEC EDGAR 12/18/2025 - 04:45 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Gagnon Robert E.

(Last) (First) (Middle)

C/O VERASTEM, INC.,

117 KENDRICK ST., SUITE 500

(Street)

NEEDHAM MA 02494

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Verastem, Inc. [ VSTM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/16/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/16/2025		S		283(1)	D	$9.14	41,678	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale reported on this Form 4 represents shares sold by the Reporting Person to satisfy statutory withholding requirements in connection with the vesting of restricted stock units.

	/s/ Daniel Calkins, Attorney in Fact	12/18/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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