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

Reporting relationship: President of Development, Director
Issuer ticker: VSTM
Reported as of: 06 Jan 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 08 Jan 2026, 16:01:11 UTC
Prior SEC filing: 25 Nov 2025
Next SEC filing: 11 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Calkins, Attorney in Fact

Key filing fact

Michael Kauffman filed Form 4 for Verastem, Inc. (VSTM) on 08 Jan 2026.

Key facts

This page summarizes Michael Kauffman's Form 4 filing for Verastem, Inc. (VSTM).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 08 Jan 2026, 16:01.

Change

Previous filing in this sequence was filed on 25 Nov 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001364719 Primary reporting owner

Kauffman Michael

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

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

VSTM transaction Derivative

Stock Option (right to buy)

Award

Transaction value: $0
Shares: +200,000
Change %
Price: $0.000000
Shares after: 200,000
Date: 06 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 200,000
Exercise price: $6.88
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote 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.