Verastem (VSTM) CEO discloses stock sales under Rule 10b5-1 plan

Rhea-AI Filing Summary

Verastem, Inc. reported that its President and CEO, who is also a director, sold common stock in two transactions under a Rule 10b5-1 trading plan.

On December 10, 2025, the insider sold 2,000 shares of Verastem common stock at $10.07 per share, and on December 11, 2025, sold another 2,000 shares at $10.00 per share. Following these sales, the insider directly beneficially owned 410,818 shares of Verastem common stock.

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

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

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	12/10/2025		S(1)		2,000(1)	D	$10.07	412,818	D
Common Stock	12/11/2025		S(1)		2,000(1)	D	$10	410,818	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 sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

	/s/ Daniel Calkins, Attorney in Fact	12/12/2025
	** 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.
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.

FAQ

What insider stock transactions did Verastem (VSTM) disclose in this filing?

The filing shows that an insider sold 2,000 shares of Verastem common stock on December 10, 2025 at $10.07 per share and another 2,000 shares on December 11, 2025 at $10.00 per share.

Who is the reporting person in the Verastem (VSTM) Form 4?

The reporting person is identified as both a director and an officer of Verastem, Inc., serving in the role of President and CEO.

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

After the reported sales, the insider directly beneficially owned 410,818 shares of Verastem common stock.

Were the Verastem (VSTM) stock sales made under a Rule 10b5-1 trading plan?

Yes. The filing explains that the sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

On what dates and at what prices were the Verastem (VSTM) shares sold?

The insider sold 2,000 shares on December 10, 2025 at $10.07 per share and 2,000 shares on December 11, 2025 at $10.00 per share.

Is this Verastem (VSTM) Form 4 filed by one or multiple reporting persons?

The document indicates that the Form 4 is filed by one reporting person, not a group filing.