Verastem director granted 36,000 RSUs

ROBERTSON MICHELLE reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

ROBERTSON MICHELLE reported acquisition or exercise transactions in this Form 4 filing.

Verastem, Inc. director Michelle Robertson received a grant of 36,000 restricted stock units (RSUs) of Common Stock as equity compensation. The award was granted at no cash cost per share and is structured to vest over time rather than all at once.

The RSUs were granted under Verastem's Amended and Restated 2021 Equity Incentive Plan, with each RSU representing the right to receive one share of Common Stock. The units vest in twelve substantially equal monthly installments from the end of June 2026 through April 2027, with the final installment vesting on the earlier of the day before the 2027 Annual Meeting of Stockholders or May 31, 2027, subject to her continued board service. After this grant, Robertson directly holds 52,666 shares of Verastem common stock.

Insider Trade Summary

Grant/Award: 36,000 shares

Grant/Award 1 txn

Insider ROBERTSON MICHELLE

Role Director

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

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

Footnotes (1)

1. F1. 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.

Key Figures

RSU grant size: 36,000 shares Grant price per share: $0.00 per share Post-grant holdings: 52,666 shares +2 more

5 metrics

RSU grant size 36,000 shares Restricted stock units of Common Stock granted to director

Grant price per share $0.00 per share Reported transaction price for RSU award

Post-grant holdings 52,666 shares Common Stock directly owned after transaction

Vesting start June 2026 First of eleven monthly vesting installments

Final vesting date Earlier of day before 2027 meeting or May 31, 2027 Final RSU installment vesting condition

Key Terms

RSUs, Amended and Restated 2021 Equity Incentive Plan, contingent right, Annual Meeting of Stockholders

4 terms

RSUs financial

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

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

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."

contingent right financial

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

Annual Meeting of Stockholders financial

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

FAQ

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

What did Verastem (VSTM) director Michelle Robertson report on this Form 4?

Michelle Robertson reported receiving 36,000 restricted stock units (RSUs) of Verastem common stock as an equity grant. The award is compensation, not an open-market share purchase, and will convert into shares only as the RSUs vest over time.

How many Verastem (VSTM) shares does Michelle Robertson hold after this RSU grant?

After the RSU grant, Michelle Robertson holds 52,666 shares of Verastem common stock directly. This total reflects her ownership position as shown immediately following the reported award in the Form 4 filing for the non-derivative common stock transaction.

What are the vesting terms of Michelle Robertson’s 36,000 Verastem (VSTM) RSUs?

The 36,000 RSUs vest in twelve substantially equal installments. Eleven installments vest monthly from June 2026 through April 2027, and the final portion vests the day before the 2027 Annual Meeting or on May 31, 2027, if she continues serving as a director.

Under which plan were Michelle Robertson’s Verastem (VSTM) RSUs granted?

The RSUs were granted under Verastem’s Amended and Restated 2021 Equity Incentive Plan. This plan governs equity-based compensation awards, with each RSU representing a contingent right to receive one share of Verastem common stock upon vesting.

Does Michelle Robertson pay cash for the 36,000 Verastem (VSTM) RSUs reported?

No, the RSUs were granted at a reported price of $0.00 per share as part of her director compensation. The award represents a right to receive shares over time, subject to vesting conditions and continued service on Verastem’s board.

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

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Accepted by SEC EDGAR 05/26/2026 - 06:19 PM EDT 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).

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^*

ROBERTSON MICHELLE

(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)