SCHEDULE: Stonepine Capital Amends Verastem Stake to 4.3%

Stonepine Capital Management and its affiliates have filed an amended Schedule 13G, reporting a 4.3% beneficial ownership stake in Verastem, Inc. common stock.

Summary

• Stonepine Capital Management, LLC, Stonepine Capital, L.P., Stonepine GP, LLC, and Jon M. Plexico jointly reported beneficial ownership of 2,670,032 shares of Verastem, Inc. common stock.
• This represents 4.3% of Verastem's outstanding common stock, calculated based on 66,776,006 shares outstanding as of November 3, 2025, as reported in the Issuer's Form 10-Q for the quarter ended September 30, 2025.
• The filing is an Amendment No. 1 to a Schedule 13G, indicating an update to a previously reported beneficial ownership position.
• The reporting persons explicitly disclaim any intent to change or influence control of Verastem, Inc., or to have acquired or held the securities for such purposes.

Sentiment

Score: 5

Explanation: This is a neutral, factual disclosure of beneficial ownership. The reporting persons explicitly disclaim any intent to influence control, indicating a passive investment.

Future Outlook

NA

Management Comments

• The reporting persons are filing this Schedule 13G jointly, but not as members of a group, and each disclaims membership in a group.
• Each reporting person also disclaims beneficial ownership of Common Stock except to the extent of that person's pecuniary interest therein.
• The filing of this Schedule 13G on behalf of the Partnership should not be construed as an admission that it is, and it disclaims that it is, a beneficial owner, as defined in Rule 13d-3 under the Act, of any Common Stock covered by this Schedule 13G.
• I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under §§ 240.14a-11.

Industry Context

NA

Stakeholder Impact

• Shareholders: Provides transparency regarding a significant institutional investor's passive stake, now below 5%, in Verastem, Inc.

Key Dates

Keywords

Verastem Inc., Stonepine Capital Management, Schedule 13G, Beneficial Ownership, Common Stock, Institutional Investor, Passive Investment, Equity Stake