Daniel Calkins - 21 Jan 2026 Form 4 Insider Report for Verastem, Inc. (VSTM)

Role: Chief Financial Officer
Signature: /s/ Daniel Calkins
Issuer symbol: VSTM
Transactions as of: 21 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 23 Jan 2026, 16:58:52 UTC
Previous filing: 14 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Calkins Daniel	Chief Financial Officer	C/O VERASTEM, INC.,, 117 KENDRICK ST., SUITE 500, NEEDHAM	/s/ Daniel Calkins	23 Jan 2026	0001951861

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	VSTM	Common Stock	Award	$0	+16,665	+16%	$0.000000	121,384	21 Jan 2026	Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted stock units ("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 as to 33.3% of the RSUs on the first three anniversaries of January 21, 2026 such that the award is fully vested on January 21, 2029 (with the number of RSUs vesting on each vesting date rounded down to the nearest whole RSU, except with respect to the final vesting date on which all remaining unvested RSUs shall vest), provided that the Reporting Person continues to serve as an employee of or other service provider to the Issuer on each such vesting date.

Content

Restricted stock units ("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 as to 33.3% of the RSUs on the first three anniversaries of January 21, 2026 such that the award is fully vested on January 21, 2029 (with the number of RSUs vesting on each vesting date rounded down to the nearest whole RSU, except with respect to the final vesting date on which all remaining unvested RSUs shall vest), provided that the Reporting Person continues to serve as an employee of or other service provider to the Issuer on each such vesting date.