HOWL
Werewolf Therapeutics, Inc.Company with tickers: HOWL
CIK
1785530
CUSIP
95075A107
Shares Outstanding
48,596,817
13F Activity (30d)
4 filings
3 filers
Notices of intent to sell restricted or control shares, filed with the SEC on Form 144 by insiders and affiliates. A Form 144 signals a planned sale — it does not confirm the shares were actually sold.
| Filed | Seller | Relationship | Shares | Approx. Sale | Broker |
|---|---|---|---|---|---|
| 2026-01-06 | MPM BioVentures 2014, L.P. | Shareholder | 198,739 | 2026-01-06 | Merrill Lynch |
| 2026-01-06 | MPM Asset Management LLC | Shareholder | 31,458 | 2026-01-06 | Merrill Lynch |
| 2026-01-06 | UBS Oncology Impact Fund, L.P. | Shareholder | 164,126 | 2026-01-06 | Merrill Lynch |
| 2026-01-06 | MPM BioVentures 2014 (B), L.P. | Shareholder | 13,256 | 2026-01-06 | Merrill Lynch |
| 2026-01-06 | MPM Asset Management Investors BV2014 LLC | Shareholder | 6,840 | 2026-01-06 | Merrill Lynch |
| 2026-01-06 | MPM Oncology Innovations Fund, L.P. | Shareholder | 43,767 | 2026-01-06 | Merrill Lynch |
| 2025-12-29 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-12-29 | Merrill Lynch |
| 2025-12-29 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-12-29 | Merrill Lynch |
| 2025-12-29 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-12-29 | Merrill Lynch |
| 2025-12-29 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-12-29 | Merrill Lynch |
| 2025-12-29 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-12-29 | Merrill Lynch |
| 2025-12-29 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-12-29 | Merrill Lynch |
| 2025-12-22 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-12-22 | Merrill Lynch |
| 2025-12-22 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-12-22 | Merrill Lynch |
| 2025-12-22 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-12-22 | Merrill Lynch |
| 2025-12-22 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-12-22 | Merrill Lynch |
| 2025-12-22 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-12-22 | Merrill Lynch |
| 2025-12-22 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-12-22 | Merrill Lynch |
| 2025-12-10 | MPM BioVentures 2014 (B), L.P. | Shareholder | 5,912 | 2025-12-10 | Merrill Lynch |
| 2025-12-10 | UBS Oncology Impact Fund, L.P. | Shareholder | 73,195 | 2025-12-10 | Merrill Lynch |
| 2025-12-10 | MPM BioVentures 2014, L.P. | Shareholder | 88,632 | 2025-12-10 | Merrill Lynch |
| 2025-12-10 | MPM Asset Management LLC | Shareholder | 14,029 | 2025-12-10 | Merrill Lynch |
| 2025-12-10 | MPM Oncology Innovations Fund, L.P. | Shareholder | 19,519 | 2025-12-10 | Merrill Lynch |
| 2025-12-10 | MPM Asset Management Investors BV2014 LLC | Shareholder | 3,050 | 2025-12-10 | Merrill Lynch |
| 2025-12-03 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-12-03 | Merrill Lynch |
| 2025-12-03 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-12-03 | Merrill Lynch |
| 2025-12-03 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-12-03 | Merrill Lynch |
| 2025-12-03 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-12-03 | Merrill Lynch |
| 2025-12-03 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-12-03 | Merrill Lynch |
| 2025-12-03 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-12-03 | Merrill Lynch |
| 2025-11-24 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-11-24 | Merrill Lynch |
| 2025-11-24 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-11-24 | Merrill Lynch |
| 2025-11-24 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-11-24 | Merrill Lynch |
| 2025-11-24 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-11-24 | Merrill Lynch |
| 2025-11-24 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-11-24 | Merrill Lynch |
| 2025-11-24 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-11-24 | Merrill Lynch |
| 2025-11-17 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-11-17 | Merrill Lynch |
| 2025-11-17 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-11-17 | Merrill Lynch |
| 2025-11-17 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-11-17 | Merrill Lynch |
| 2025-11-17 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-11-17 | Merrill Lynch |
| 2025-11-17 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-11-17 | Merrill Lynch |
| 2025-11-17 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-11-17 | Merrill Lynch |
| 2025-11-10 | MPM BioVentures 2014, L.P. | Shareholder | 130,125 | 2025-11-10 | Merrill Lynch |
| 2025-11-10 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-11-10 | Merrill Lynch |
| 2025-11-10 | MPM Asset Management Investors BV2014 LLC | Shareholder | 4,479 | 2025-11-10 | Merrill Lynch |
| 2025-11-10 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-11-10 | Merrill Lynch |
| 2025-11-10 | MPM Asset Management LLC | Shareholder | 20,597 | 2025-11-10 | Merrill Lynch |
| 2025-11-10 | MPM BioVentures 2014 (B), L.P. | Shareholder | 8,679 | 2025-11-10 | Merrill Lynch |
| 2025-11-04 | UBS Oncology Impact Fund, L.P. | Shareholder | 107,463 | 2025-11-04 | Merrill Lynch |
| 2025-11-04 | MPM Oncology Innovations Fund, L.P. | Shareholder | 28,657 | 2025-11-04 | Merrill Lynch |
Showing 1–50 of 66 filings