Werewolf Therapeutics, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| EVNIN LUKE | — | Sale | 59,307 | $0.69 | $40,922 | 2,782,650 | Dec 23, 2025 |
| EVNIN LUKE | — | Sale | 9,983 | $1.14 | $11,381 | 2,841,957 | Dec 15, 2025 |
| EVNIN LUKE | — | Sale | 17,858 | $1.08 | $19,287 | 2,890,128 | Dec 11, 2025 |
| EVNIN LUKE | — | Sale | 34,041 | $0.99 | $33,701 | 3,017,669 | Dec 9, 2025 |
| MPM BioVentures 2014 (B), L.P. | — | Sale | 59,277 | $0.89 | $52,757 | 4,924,566 | Dec 3, 2025 |
| MPM BioImpact LLC | — | Sale | 83,230 | $0.97 | $80,733 | 4,784,111 | Dec 3, 2025 |
| EVNIN LUKE | — | Sale | 53,416 | $0.97 | $51,814 | 3,068,278 | Dec 2, 2025 |
| EVNIN LUKE | — | Sale | 38,978 | $0.98 | $38,198 | 3,248,573 | Dec 1, 2025 |
| MPM Asset Management Investors BV2014 LLC | — | Sale | 60,733 | $0.98 | $59,518 | 5,065,037 | Dec 1, 2025 |
| UBS Oncology Impact Fund L.P. | — | Sale | 60,733 | $0.98 | $59,518 | 5,065,037 | Nov 28, 2025 |
| MPM BioVentures 2014 GP LLC | — | Sale | 88,802 | $0.98 | $87,026 | 5,168,303 | Nov 25, 2025 |
| MPM Oncology Innovations Fund GP LLC | — | Sale | 64,331 | $0.83 | $53,395 | 5,257,105 | Nov 25, 2025 |
| EVNIN LUKE | — | Sale | 27,297 | $0.92 | $25,113 | 3,287,551 | Nov 24, 2025 |
| MPM BioVentures 2014 LLC | — | Sale | 52,627 | $0.93 | $48,943 | 5,428,912 | Nov 20, 2025 |
| EVNIN LUKE | — | Sale | 26,411 | $0.89 | $23,506 | 3,413,127 | Nov 18, 2025 |
| MPM Oncology Innovations Fund GP LLC | — | Sale | 66,324 | $0.94 | $62,345 | 5,362,588 | Nov 18, 2025 |
| EVNIN LUKE | — | Sale | 39,560 | $0.93 | $36,791 | 3,552,501 | Nov 17, 2025 |
| MPM Oncology Innovations Fund GP LLC | — | Sale | 90,951 | $0.98 | $89,132 | 5,600,240 | Nov 17, 2025 |
| MPM BioVentures 2014 LLC | — | Sale | 61,640 | $0.93 | $57,325 | 5,538,600 | Nov 13, 2025 |
| MPM BioVentures 2014, L.P. | — | Sale | 68,480 | $1.11 | $76,013 | 5,836,240 | Nov 10, 2025 |
| UBS Oncology Impact Fund L.P. | — | Sale | 55,810 | $1.14 | $63,623 | 5,731,860 | Nov 10, 2025 |
| EVNIN LUKE | — | Sale | 31,172 | $1.18 | $36,783 | 3,712,352 | Nov 7, 2025 |
| EVNIN LUKE | — | Sale | 34,947 | $1.21 | $42,286 | 3,787,474 | Nov 5, 2025 |
| MPM BioImpact LLC | — | Sale | 140,488 | $1.22 | $171,395 | 6,007,122 | Nov 5, 2025 |
| MPM BioVentures 2014 LLC | — | Sale | 54,452 | $1.21 | $65,887 | 5,904,720 | Nov 4, 2025 |
| EVNIN LUKE | — | Sale | 55,795 | $1.43 | $79,787 | 4,076,920 | Oct 31, 2025 |
| MPM Asset Management Investors BV2014 LLC | — | Sale | 86,936 | $1.43 | $124,318 | 6,355,717 | Oct 31, 2025 |
| MPM ONCOLOGY INNOVATIONS FUND LP | — | Sale | 94,063 | $1.29 | $121,341 | 6,147,610 | Oct 30, 2025 |
| MPM BioVentures 2014 LLC | — | Sale | 72,709 | $1.72 | $125,059 | 6,645,961 | Oct 29, 2025 |
| EVNIN LUKE | — | Sale | 44,327 | $1.64 | $72,696 | 4,218,869 | Oct 27, 2025 |
| UBS Oncology Impact Fund L.P. | — | Sale | 134,240 | $1.55 | $208,072 | 6,442,653 | Oct 27, 2025 |
| RA Capital Nexus Fund II, L.P. | — | Purchase | 320,913 | $0.86 | $275,985 | 6,021,969 | May 13, 2025 |
| MPM Asset Management Investors BV2014 LLC | — | Sale | 1,963 | $1.05 | $2,061 | 3,208,793 | Mar 27, 2025 |
| EVNIN LUKE | — | X | 28,113 | $0.09 | $2,530 | 4,312,285 | Mar 27, 2025 |
| MPM ASSET MANAGEMENT LLC | — | X | 50,873 | $0.09 | $4,579 | 6,723,056 | Mar 27, 2025 |
| Shah Rajeev M. | — | Purchase | 1,853,000 | $2.21 | $4,095,130 | 5,701,056 | Jan 6, 2023 |
| Seidel-Dugan Cynthia | Chief Scientific Officer | Option Exercise | 24,199 | $1.56 | $37,750 | 149,356 | Jan 12, 2022 |
| Leonard Reid | Chief Operating Officer | Option Exercise | 14,102 | $1.56 | $21,999 | 14,102 | Dec 30, 2021 |
| Leonard Reid | Chief Operating Officer | Sale | 2,865 | $13.39 | $38,362 | 122,292 | Dec 15, 2021 |
| RA Capital Healthcare Fund LP | — | Purchase | 9,285 | $13.37 | $124,140 | 4,291,881 | Jun 15, 2021 |
| Flynn James E | — | Purchase | 800,000 | $16.00 | $12,800,000 | 2,552,787 | May 4, 2021 |
| Sphera Global Healthcare Management LP | — | Purchase | 475,000 | $16.00 | $7,600,000 | 787,997 | May 4, 2021 |
| Shah Rajeev M. | — | Purchase | 105,788 | $16.00 | $1,692,608 | 443,825 | May 4, 2021 |
| MPM BioVentures 2014 LLC | — | C | 2,298,430 | — | — | 2,298,430 | May 4, 2021 |
| MPM Oncology Impact Management LP | — | Purchase | 245,000 | $16.00 | $3,920,000 | 6,672,183 | May 4, 2021 |
| EVNIN LUKE | — | Purchase | 150,799 | $16.00 | $2,412,784 | 4,284,172 | May 4, 2021 |
| HBM Healthcare Investments (Cayman) Ltd. | — | C | 625,995 | — | — | 625,995 | May 4, 2021 |
| Taiho Ventures LLC | — | C | 438,098 | — | — | 1,756,409 | May 4, 2021 |
| Arkin Moshe | — | C | 1,235,917 | — | — | 1,235,917 | May 4, 2021 |
| Asanuma Sakae | — | Purchase | 312,500 | $16.00 | $5,000,000 | 2,068,909 | May 4, 2021 |