RTW INVESTMENTS, LP - 31 Dec 2025 SCHEDULE 13G/A Report for Verastem, Inc. Common Stock, $0.0001 par value (VSTM)

Filing Manager
RTW INVESTMENTS, LP
Reporting Manager
RTW Investments, LP
Security
Verastem, Inc. Common Stock, $0.0001 par value
Symbol
VSTM
Shares outstanding
79,155,010 shares
Disclosed Ownership
7,836,346 shares
Ownership
9.9%
Form type
SCHEDULE 13G/A
Filing time
17 Feb 2026, 08:54:31 UTC
Date of event
31 Dec 2025
Previous filing
14 Aug 2025
SEC
View on sec.gov

Quoteable Key Fact

"RTW INVESTMENTS, LP disclosed 9.9% ownership in Verastem, Inc. Common Stock, $0.0001 par value (VSTM) on 31 Dec 2025."

Quick Takeaways

  • RTW INVESTMENTS, LP filed SCHEDULE 13G/A for Verastem, Inc. Common Stock, $0.0001 par value (VSTM).
  • Disclosed ownership: 9.9%.
  • Date of event: 31 Dec 2025.

What Changed

  • Previous schedule filing date: 14 Aug 2025.
  • Current filing was accepted on 17 Feb 2026, 08:54.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (2)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
RTW Investments, LP 9.9% 7,836,346 0 7,836,346 /s/ Roderick Wong, M.D. Roderick Wong, M.D., Managing Partner
Roderick Wong 9.9% 7,836,346 0 7,836,346 s/ Roderick Wong, M.D. Roderick Wong, M.D.