Eric K. Rowinsky - 21 May 2026 Form 4 Insider Report for Verastem, Inc. (VSTM)

Reporting relationship: Director
Issuer ticker: VSTM
Reported as of: 21 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 May 2026, 18:21:09 UTC
Prior SEC filing: 18 Jun 2025
Next SEC filing: 11 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Calkins, Attorney in Fact

Key filing fact

Eric K. Rowinsky filed Form 4 for Verastem, Inc. (VSTM) on 26 May 2026.

Key facts

This page summarizes Eric K. Rowinsky's Form 4 filing for Verastem, Inc. (VSTM).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 26 May 2026, 18:21.

Change

Previous filing in this sequence was filed on 18 Jun 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 0001318886 Primary reporting owner

Rowinsky Eric K

Relationship: Director
Address: C/O VERASTEM, INC.,, 117 KENDRICK ST., SUITE 500, NEEDHAM
Signature: /s/ Daniel Calkins, Attorney in Fact
Signature date: 26 May 2026

Reported non-derivative transactions

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

VSTM transaction

Common Stock

Award

Transaction value
Shares: +36,000
Change %: +216%
Price: $0.000000^*
Shares after: 52,666
Date: 21 May 2026
Ownership: Direct
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

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 in twelve substantially equal installments (rounded down to the nearest whole share on each vesting date except with respect to the final vesting date on which the remaining unvested portion shall vest). The first eleven installments shall vest beginning on the last day of each month over a period from June, 2026 to April, 2027 and the last installment shall vest on the earlier of (i) the day before the 2027 Annual Meeting of Stockholders is held or (ii) May 31, 2027, provided that the Reporting Person continues to serve as a director of the Issuer on each such vesting date.