Verastem (VSTM) CFO Daniel Calkins Sells 55 Shares

What Happened
Daniel Calkins, Chief Financial Officer of Verastem, sold 55 shares of Verastem common stock in a disposition on 2026-09-21 at $7.70 per share for total proceeds of roughly $424. This was a sale (not a discretionary investment decision) reported as a withholding transaction connected to the vesting of restricted stock units.

Key Details

• Transaction date and price: 2026-09-21 — 55 shares sold at $7.70 each (total ≈ $424).
• Transaction type/code: Sale (S); footnote indicates tax withholding (F) to satisfy statutory withholding on RSU vesting.
• Shares owned after transaction: The filing does not state a full post-transaction total in this summary; it notes reported beneficial ownership includes 831 shares acquired under the Issuer’s 2018 Employee Stock Purchase Plan.
• Filing timeliness: Form 4 filed 2026-09-23 for a 2026-09-21 transaction — appears to be timely (not marked late).

Context: Withholding sales tied to RSU vesting are routine administrative transactions to cover taxes and do not necessarily indicate an insider’s view on the company’s outlook. The size of this sale (55 shares, ~$424) is small and consistent with a tax-withholding event rather than a large-scale liquidation.