Michael Kauffman - 06 Jan 2026 Form 4 Insider Report for Verastem, Inc. (VSTM)

Role: President of Development, Director
Signature: /s/ Daniel Calkins, Attorney in Fact
Issuer symbol: VSTM
Transactions as of: 06 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 08 Jan 2026, 16:01:11 UTC
Previous filing: 25 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Kauffman Michael	President of Development, Director	C/O VERASTEM, INC., 117 KENDRICK ST.,, SUITE 500, NEEDHAM	/s/ Daniel Calkins, Attorney in Fact	08 Jan 2026	0001364719

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	VSTM	Stock Option (right to buy)	Award	$0	+200,000		$0.000000	200,000	06 Jan 2026	Common Stock	200,000	$6.88	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The stock option vests 33.33% of the shares on the first anniversary of January 6, 2026 (the "Grant Date"), and an additional 8.33% will vest at the end of each successive three-month period following the first anniversary of the Grant Date until the third anniversary of the Grant Date (with the number of shares vesting on each vesting date rounded down to the nearest whole share, except with respect to the final vesting date on which all remaining unvested shares 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

The stock option vests 33.33% of the shares on the first anniversary of January 6, 2026 (the "Grant Date"), and an additional 8.33% will vest at the end of each successive three-month period following the first anniversary of the Grant Date until the third anniversary of the Grant Date (with the number of shares vesting on each vesting date rounded down to the nearest whole share, except with respect to the final vesting date on which all remaining unvested shares 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.