Verastem (VSTM) CEO sells 20,871 shares to cover RSU tax withholding

Rhea-AI Filing Summary

Verastem, Inc. President and CEO Dan Paterson reported an open-market sale of 20,871 shares of common stock at $4.18 per share. According to the footnote, this sale was made to satisfy statutory withholding requirements related to the vesting of restricted stock units, rather than a discretionary trade. Following the transaction, he directly owns 591,242 shares of Verastem common stock.

Insider Trade Summary 10b5-1

Net Seller: 20,871 shares ($87,241)

Net Sell 1 txn

Insider Paterson Dan

Role President and CEO

Sold 20,871 shs ($87K)

Type	Security	Shares	Price	Value
Sale	Common Stock	20,871	$4.18	$87K

Holdings After Transaction: Common Stock — 591,242 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 20,871 shares Sale price: $4.18 per share Shares held after: 591,242 shares

3 metrics

Shares sold 20,871 shares Common Stock sold on 2026-06-22

Sale price $4.18 per share Price for Common Stock sale on 2026-06-22

Shares held after 591,242 shares Direct ownership after transaction

Key Terms

restricted stock units, statutory withholding requirements, open-market sale, Form 4

4 terms

restricted stock units financial

"in connection with the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

statutory withholding requirements financial

"shares sold by the Reporting Person to satisfy statutory withholding requirements"

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"The sale reported on this Form 4 represents shares sold"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/24/2026 - 04:45 PM Accepted by SEC EDGAR 06/24/2026 - 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^*

Paterson Dan

(Last) (First) (Middle)

C/O VERASTEM, INC.,

117 KENDRICK ST., SUITE 500

(Street)

NEEDHAM MASSACHUSETTS 02494

(City) (State) (Zip)

UNITED STATES

(Country)

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
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/22/2026

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

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

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

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	06/22/2026		S		20,871(1)	D	$4.18	591,242	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	06/24/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Verastem (VSTM) report for CEO Dan Paterson?

Verastem reported that CEO Dan Paterson sold 20,871 shares of common stock at $4.18 per share. The sale was tied to tax withholding obligations from vesting restricted stock units, rather than a discretionary open-market reduction of his stake.

Why did Verastem CEO Dan Paterson sell shares in this Form 4 filing?

The filing states the sale was to satisfy statutory withholding requirements from the vesting of restricted stock units. This means shares were sold primarily to cover tax obligations associated with equity compensation, not as an independent investment decision to reduce exposure.

How many Verastem (VSTM) shares does CEO Dan Paterson hold after the reported sale?

After the reported transaction, Dan Paterson directly holds 591,242 shares of Verastem common stock. This post-transaction figure shows his remaining equity position following the 20,871-share sale executed to cover statutory withholding requirements on vested restricted stock units.

What price per share was received in Dan Paterson’s Verastem stock sale?

The Form 4 reports that shares of Verastem common stock were sold at $4.18 per share. This price applied to the 20,871 shares sold in the transaction that was carried out to cover statutory withholding taxes from restricted stock unit vesting.

Does the Verastem Form 4 indicate this CEO sale was routine tax withholding?

Yes. The footnote explains the sale represents shares sold to satisfy statutory withholding requirements on vested restricted stock units. That language indicates a tax-related, compensation-driven sale rather than a discretionary decision to significantly change the CEO’s ownership position.