Director at Verastem (VSTM) receives 36,000 RSUs as equity award

Rhea-AI Filing Summary

Tollefson Karin Anna reported acquisition or exercise transactions in this Form 4 filing.

Verastem, Inc. director Karin Anna Tollefson received a grant of 36,000 restricted stock units (RSUs) of Common Stock. The RSUs were awarded under Verastem’s Amended and Restated 2021 Equity Incentive Plan and require her continued service as a director to vest.

The RSUs vest in 12 substantially equal monthly installments, with the first 11 vesting on the last day of each month from June 2026 through April 2027. The final installment vests on the earlier of the day before Verastem’s 2027 Annual Meeting of Stockholders or May 31, 2027. After this grant, Tollefson directly holds 52,666 shares of Verastem Common Stock, including the granted RSUs.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Tollefson Karin Anna

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	36,000	$0.00	--

Holdings After Transaction: Common Stock — 52,666 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

RSUs granted: 36,000 RSUs Shares held after grant: 52,666 shares Vesting installments: 12 installments +1 more

4 metrics

RSUs granted 36,000 RSUs Director equity award of Common Stock RSUs

Shares held after grant 52,666 shares Total Verastem Common Stock directly held after RSU award

Vesting installments 12 installments RSUs vest in twelve substantially equal installments

Monthly vesting window June 2026–April 2027 First 11 RSU installments vest at month-end over this period

Key Terms

Restricted Stock Unit (RSU), Amended and Restated 2021 Equity Incentive Plan, Annual Meeting of Stockholders

3 terms

Restricted Stock Unit (RSU) financial

"Each RSU represents the contingent right to receive one share of Common Stock."

A restricted stock unit (RSU) is a promise from a company to give an employee company shares (or cash equal to their value) at a future date if certain conditions are met, such as staying with the company or hitting performance targets. For investors, RSUs matter because when they convert into actual shares they increase the number of shares available and can create selling pressure as employees cash out—think of them as a future paycheck paid in company stock.

Amended and Restated 2021 Equity Incentive Plan financial

"RSUs granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan."

Annual Meeting of Stockholders financial

"the day before the 2027 Annual Meeting of Stockholders is held or (ii) May 31, 2027"

Form 4 Insider Transactions: What Each Field Means →

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
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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).

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^*

Tollefson Karin Anna

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/21/2026

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	05/21/2026		A		36,000(1)	A	$0.00	52,666	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. RSUs granted to the Reporting Person under the Issuer's Amended and Restated 2021 Equity Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest in twelve substantially equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2026 to April, 2027 and the last installment shall vest on the earlier of (i) the day before the 2027 Annual Meeting of Stockholders is held or (ii) May 31, 2027, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date.

	/s/ Daniel Calkins, Attorney in Fact	05/26/2026
	** 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)