Robert E. Gagnon - 16 Dec 2025 Form 4 Insider Report for Verastem, Inc. (VSTM)

Reporting relationship: Director
Issuer ticker: VSTM
Reported as of: 16 Dec 2025
Net transaction value: -$2,587
SEC form: 4
Accepted by SEC: 18 Dec 2025, 16:45:15 UTC
Prior SEC filing: 18 Sep 2025
Next SEC filing: 26 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Calkins, Attorney in Fact

Key filing fact

Robert E. Gagnon filed Form 4 for Verastem, Inc. (VSTM) on 18 Dec 2025.

Key facts

This page summarizes Robert E. Gagnon's Form 4 filing for Verastem, Inc. (VSTM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 18 Dec 2025, 16:45.

Change

Previous filing in this sequence was filed on 18 Sep 2025.
Current net transaction value: -$2,587.

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 0001504983 Primary reporting owner

Gagnon Robert E.

Relationship: Director
Address: C/O VERASTEM, INC.,, 117 KENDRICK ST., SUITE 500, NEEDHAM
Signature: /s/ Daniel Calkins, Attorney in Fact
Signature date: 18 Dec 2025

Reported non-derivative transactions

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

VSTM transaction

Common Stock

Sale

Transaction value: $2,587
Shares: -283
Change %: -0.67%
Price: $9.14
Shares after: 41,678
Date: 16 Dec 2025
Ownership: Direct
Footnotes: F1

^* 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 1 footnote

Footnote F1

The sale reported on this Form 4 represents shares sold by the Reporting Person to satisfy statutory withholding requirements in connection with the vesting of restricted stock units.