November 11, 2025 · Form 4 insider transaction
MPM BioVentures 2014, L.P. sold 55,810 shares of HOWL at $1.14 per share, a transaction worth $63.6K. The trade was recorded as open-market sale under a pre-scheduled Rule 10b5-1 plan and disclosed on an SEC Form 4, filed 1 day after the transaction.
Transaction effected pursuant to a plan established pursuant to Rule 10b5-1 dated September 24, 2025.; The shares were sold as follows: 3,832 by AM LLC, 24,208 by BV 2014, 1,615 by BV 2014(B), 832 by AM BV2014, 5,331 by MPM OIF and 19,992 by UBS Oncology.; The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.115 to $1.17 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.; MPM BioVentures 2014 GP LLC and MPM BioVentures 2014 LLC ("BV LLC") are the direct and indirect general partners of BV 2014 and BV 2014(B). BV LLC is the manager of AM BV2014. MPM Oncology Innovations Fund GP LLC ("MPM OIF GP") is the general partner of MPM OIF. MPM BioImpact LLC ("BioImpact") is the General Partner of Oncology Impact Fund (Cayman) Management L.P., the General Partner of UBS Oncology. Ansbert Gadicke is a member of AM LLC, a managing director of BV LLC, a manager of MPM OIF GP and the managing partner of BioImpact. Each Reporting Person disclaims beneficial ownership of the securities except to the extent of his or its pecuniary interest therein.; The shares are held as follows: 393,657 by AM LLC, 2,486,091 by BV 2014, 165,819 by BV 2014(B), 85,570 by AM BV2014, 545,397 by MPM OIF and 2,055,326 by UBS Oncology.