Major Investor Files Intent to Sell Additional Shares Amidst Ongoing Divestment
HOWL sits 18% above its 52-week low of $0.559.
Summary
A key institutional investor, MPM BioVentures, has filed to sell more shares, continuing a pattern of significant divestment from Werewolf Therapeutics.
Key Events · Ownership and Investor Activity · HOWL
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Intent to Sell Additional Shares
MPM BioVentures 2014, L.P. has filed a Form 144 to sell 198,739 shares of common stock, valued at approximately $128,067.
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Ongoing Institutional Divestment
This filing follows a pattern of continuous selling by MPM BioVentures and its affiliated entities, which have sold over $2.2 million worth of shares in the past three months, indicating a sustained reduction in their stake.
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Filer is Major Shareholder
MPM BioVentures 2014, L.P. is identified as a significant shareholder, making its ongoing sales a notable event for the company.
Analysis · HOWL · Life Sciences
MPM BioVentures 2014, L.P., a significant institutional shareholder, has filed a Form 144 indicating its intent to sell an additional $128,067 worth of common stock. This filing comes after a period of continuous selling by MPM BioVentures and its affiliates, which have divested over $2.2 million in shares over the past three months. This sustained liquidation by a major investor suggests a lack of confidence or a strategic exit, which could exert downward pressure on the stock.
How filings like this one have moved
In the 30 days to Sep 15, 2026, 29.9% of the 1678 measured filings Wiseek scored 7 moved their stock by 5% or more by the next session's close. The median move was -0.25%. These are measured outcomes after filings of this importance, not a forecast for this one.
Measured one observation per ticker per day, after exclusions. Current figures: Filing Impact Tracker · open dataset
At the time of this filing, HOWL was trading at $0.66 on NASDAQ in the Life Sciences sector, with a market capitalization of approximately $31.2M. The 52-week trading range was $0.56 to $2.38. This filing was assessed with negative market sentiment and an importance score of 7 out of 10.