Michael Kauffman - 21 Nov 2025 Form 4 Insider Report for Verastem, Inc. (VSTM)

Reporting relationship: Director
Issuer ticker: VSTM
Reported as of: 21 Nov 2025
Net transaction value: -$85,500
SEC form: 4
Accepted by SEC: 25 Nov 2025, 17:34:12 UTC
Prior SEC filing: 23 Jun 2025
Next SEC filing: 08 Jan 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 25 Nov 2025.

Key facts

This page summarizes Michael Kauffman's Form 4 filing for Verastem, Inc. (VSTM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 25 Nov 2025, 17:34.

Change

Previous filing in this sequence was filed on 23 Jun 2025.
Current net transaction value: -$85,500.

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: Director
Address: C/O VERASTEM, INC., 117 KENDRICK ST.,, SUITE 500, NEEDHAM
Signature: /s/ Daniel Calkins, Attorney in Fact
Signature date: 25 Nov 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

VSTM transaction

Common Stock

Sale

Transaction value: $85,500
Shares: -8,550
Change %: -50%
Price: $10.00
Shares after: 8,666
Date: 21 Nov 2025
Ownership: Direct
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

Footnote F2

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $10.00 through $10.01, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the range set forth herein.