HOWL · Werewolf Therapeutics Inc. Common Stock
View on chartInsiders & Stakes
| MPM BioVentures 2014, L.P. 10% Owner | ▼ Sell | Open Market | 4,784,111 Shares held | 12/4/2025 | View profile |
| Ansbert Gadicke Director | ▼ Sell | Open Market | 4,784,111 Shares held | 12/4/2025 | View profile |
| RA CAPITAL MANAGEMENT, L.P. Director | ▼ Sell | Open Market | 303,719 Shares held | 6/17/2026 | View profile |
| Seidel-Dugan Cynthia Chief Scientific Officer | ▲ Buy | Option Exercise | 164,888 Shares held | 1/12/2022 | View profile |
| Leonard Reid Chief Operating Officer | ▲ Buy | Option Exercise | 14,102 Shares held | 12/30/2021 | View profile |
| Luke Evnin | ▼ Sell | Open Market | 0 Shares held | 7/7/2026 | View profile |
Transaction History
| Luke Evnin | ▼ Sell | Open Market | 107,429 | $33K | 7/7/2026 |
| Luke Evnin | ▼ Sell | Open Market | 35,770 | $11K | 7/6/2026 |
| Luke Evnin | ▼ Sell | Open Market | 157,084 | $47K | 6/29/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 389,216 | $136K | 6/17/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 27,695 | $10K | 6/17/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 139,686 | $52K | 6/16/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 9,939 | $4K | 6/16/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 120,216 | $47K | 6/15/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 8,554 | $3K | 6/15/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 159,119 | $64K | 6/12/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 11,322 | $5K | 6/12/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 245,066 | $93K | 6/11/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 17,437 | $7K | 6/11/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 3,051 | $1K | 6/10/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 42,872 | $16K | 6/10/2026 |
| Luke Evnin | ▼ Sell | Open Market | 76,928 | $28K | 6/9/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 345,235 | $128K | 6/9/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 24,565 | $9K | 6/9/2026 |
| Luke Evnin | ▼ Sell | Open Market | 60,547 | $24K | 6/8/2026 |
| Luke Evnin | ▼ Sell | Open Market | 24,946 | $10K | 6/5/2026 |
| Luke Evnin | ▼ Sell | Open Market | 20,072 | $9K | 6/4/2026 |
| Luke Evnin | ▼ Sell | Open Market | 29,749 | $12K | 6/3/2026 |
| Luke Evnin | ▼ Sell | Open Market | 29,595 | $13K | 6/2/2026 |
| Luke Evnin | ▼ Sell | Open Market | 80,459 | $38K | 6/1/2026 |
| Luke Evnin | ▼ Sell | Open Market | 32,556 | $15K | 5/29/2026 |
| Luke Evnin | ▼ Sell | Open Market | 27,698 | $13K | 5/28/2026 |
| Luke Evnin | ▼ Sell | Open Market | 80,852 | $39K | 5/27/2026 |
| Luke Evnin | ▼ Sell | Open Market | 67,950 | $32K | 5/26/2026 |
| Luke Evnin | ▼ Sell | Open Market | 87,425 | $39K | 5/22/2026 |
| Luke Evnin | ▼ Sell | Open Market | 36,387 | $15K | 5/21/2026 |
| Luke Evnin | ▼ Sell | Open Market | 85,895 | $37K | 5/20/2026 |
| Luke Evnin | ▼ Sell | Open Market | 62,970 | $28K | 5/19/2026 |
| Luke Evnin | ▼ Sell | Open Market | 22,184 | $11K | 5/18/2026 |
| Luke Evnin | ▼ Sell | Open Market | 44,679 | $24K | 5/13/2026 |
| Luke Evnin | ▼ Sell | Open Market | 67,885 | $43K | 5/12/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 94,432 | $60K | 5/12/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 6,719 | $4K | 5/12/2026 |
| Luke Evnin | ▼ Sell | Open Market | 33,948 | $23K | 5/11/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 81,678 | $55K | 5/11/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 5,812 | $4K | 5/11/2026 |
| Luke Evnin | ▼ Sell | Open Market | 305,741 | $214K | 5/8/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 351,514 | $250K | 5/8/2026 |
| RA CAPITAL MANAGEMENT, L.P. | ▼ Sell | Open Market | 25,012 | $18K | 5/8/2026 |
| Luke Evnin | ▼ Sell | Open Market | 79,086 | $50K | 5/7/2026 |
| Luke Evnin | ▼ Sell | Open Market | 14,635 | $10K | 5/6/2026 |
| Luke Evnin | ▼ Sell | Open Market | 6,860 | $5K | 5/5/2026 |
| Luke Evnin | ▼ Sell | Open Market | 47,963 | $35K | 5/4/2026 |
| Luke Evnin | ▼ Sell | Open Market | 58,394 | $43K | 5/1/2026 |
| Luke Evnin | ▼ Sell | Open Market | 168,262 | $121K | 4/30/2026 |
| Luke Evnin | ▼ Sell | Open Market | 56,559 | $39K | 4/29/2026 |
| Luke Evnin | ▼ Sell | Open Market | 95,412 | $70K | 4/28/2026 |
| Luke Evnin | ▼ Sell | Open Market | 53,940 | $46K | 4/27/2026 |
| Luke Evnin | ▼ Sell | Open Market | 38,782 | $21K | 1/16/2026 |
| Luke Evnin | ▼ Sell | Open Market | 37,413 | $21K | 1/15/2026 |
| Luke Evnin | ▼ Sell | Open Market | 30,616 | $17K | 1/14/2026 |
| Luke Evnin | ▼ Sell | Open Market | 43,198 | $24K | 1/13/2026 |
| Luke Evnin | ▼ Sell | Open Market | 58,980 | $34K | 1/12/2026 |
| Luke Evnin | ▼ Sell | Open Market | 24,678 | $15K | 1/9/2026 |
| Luke Evnin | ▼ Sell | Open Market | 7,716 | $5K | 1/8/2026 |
| Luke Evnin | ▼ Sell | Open Market | 11,915 | $8K | 1/7/2026 |
| Luke Evnin | ▼ Sell | Open Market | 40,761 | $26K | 1/6/2026 |
| Luke Evnin | ▼ Sell | Open Market | 18,378 | $12K | 1/5/2026 |
| Luke Evnin | ▼ Sell | Open Market | 18,568 | $12K | 1/2/2026 |
| Luke Evnin | ▼ Sell | Open Market | 24,962 | $15K | 12/31/2025 |
| Luke Evnin | ▼ Sell | Open Market | 34,847 | $21K | 12/30/2025 |
| Luke Evnin | ▼ Sell | Open Market | 108,606 | $66K | 12/29/2025 |
| Luke Evnin | ▼ Sell | Open Market | 35,632 | $22K | 12/26/2025 |
| Luke Evnin | ▼ Sell | Open Market | 16,310 | $11K | 12/24/2025 |
| Luke Evnin | ▼ Sell | Open Market | 71,428 | $45K | 12/23/2025 |
| Luke Evnin | ▼ Sell | Open Market | 59,307 | $41K | 12/22/2025 |
| Luke Evnin | ▼ Sell | Open Market | 9,983 | $11K | 12/17/2025 |
| Luke Evnin | ▼ Sell | Open Market | 14,548 | $15K | 12/16/2025 |
| Luke Evnin | ▼ Sell | Open Market | 23,640 | $25K | 12/15/2025 |
| Luke Evnin | ▼ Sell | Open Market | 17,858 | $19K | 12/12/2025 |
| Luke Evnin | ▼ Sell | Open Market | 28,009 | $30K | 12/11/2025 |
| Luke Evnin | ▼ Sell | Open Market | 37,104 | $39K | 12/10/2025 |
| Luke Evnin | ▼ Sell | Open Market | 44,570 | $45K | 12/9/2025 |
| Luke Evnin | ▼ Sell | Open Market | 34,041 | $34K | 12/8/2025 |
| Luke Evnin | ▼ Sell | Open Market | 16,568 | $16K | 12/5/2025 |
| Luke Evnin | ▼ Sell | Open Market | 53,416 | $52K | 12/4/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 83,230 | $81K | 12/4/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 83,230 | $81K | 12/4/2025 |
| Luke Evnin | ▼ Sell | Open Market | 36,726 | $32K | 12/3/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 57,225 | $50K | 12/3/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 57,225 | $50K | 12/3/2025 |
| Luke Evnin | ▼ Sell | Open Market | 38,043 | $34K | 12/2/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 59,277 | $53K | 12/2/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 59,277 | $53K | 12/2/2025 |
| Luke Evnin | ▼ Sell | Open Market | 39,096 | $37K | 12/1/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 60,917 | $57K | 12/1/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 60,917 | $57K | 12/1/2025 |
| Luke Evnin | ▼ Sell | Open Market | 13,014 | $13K | 11/28/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 20,277 | $20K | 11/28/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 20,277 | $20K | 11/28/2025 |
| Luke Evnin | ▼ Sell | Open Market | 38,978 | $38K | 11/26/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 60,733 | $60K | 11/26/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 60,733 | $60K | 11/26/2025 |
| Luke Evnin | ▼ Sell | Open Market | 27,297 | $25K | 11/25/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 42,533 | $39K | 11/25/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 42,533 | $39K | 11/25/2025 |
| Luke Evnin | ▼ Sell | Open Market | 56,992 | $56K | 11/24/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 88,802 | $87K | 11/24/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 88,802 | $87K | 11/24/2025 |
| Luke Evnin | ▼ Sell | Open Market | 41,287 | $34K | 11/21/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 64,331 | $53K | 11/21/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 64,331 | $53K | 11/21/2025 |
| Luke Evnin | ▼ Sell | Open Market | 26,411 | $24K | 11/20/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 41,152 | $37K | 11/20/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 41,152 | $37K | 11/20/2025 |
| Luke Evnin | ▼ Sell | Open Market | 42,566 | $40K | 11/19/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 66,324 | $62K | 11/19/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 66,324 | $62K | 11/19/2025 |
| Luke Evnin | ▼ Sell | Open Market | 33,776 | $31K | 11/18/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 52,627 | $49K | 11/18/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 52,627 | $49K | 11/18/2025 |
| Luke Evnin | ▼ Sell | Open Market | 36,621 | $35K | 11/17/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 57,061 | $54K | 11/17/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 57,061 | $54K | 11/17/2025 |
| Luke Evnin | ▼ Sell | Open Market | 39,560 | $37K | 11/14/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 61,640 | $57K | 11/14/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 61,640 | $57K | 11/14/2025 |
| Luke Evnin | ▼ Sell | Open Market | 58,372 | $57K | 11/13/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 90,951 | $89K | 11/13/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 90,951 | $89K | 11/13/2025 |
| Luke Evnin | ▼ Sell | Open Market | 26,101 | $28K | 11/12/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 40,669 | $44K | 11/12/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 40,669 | $44K | 11/12/2025 |
| Luke Evnin | ▼ Sell | Open Market | 35,818 | $41K | 11/11/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 55,810 | $64K | 11/11/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 55,810 | $64K | 11/11/2025 |
| Luke Evnin | ▼ Sell | Open Market | 31,172 | $37K | 11/10/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 48,570 | $57K | 11/10/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 48,570 | $57K | 11/10/2025 |
| Luke Evnin | ▼ Sell | Open Market | 43,950 | $49K | 11/7/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 68,480 | $76K | 11/7/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 68,480 | $76K | 11/7/2025 |
| Luke Evnin | ▼ Sell | Open Market | 34,947 | $42K | 11/6/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 54,452 | $66K | 11/6/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 54,452 | $66K | 11/6/2025 |
| Luke Evnin | ▼ Sell | Open Market | 30,774 | $38K | 11/5/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 47,950 | $58K | 11/5/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 47,950 | $58K | 11/5/2025 |
| Luke Evnin | ▼ Sell | Open Market | 90,164 | $110K | 11/4/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 140,488 | $171K | 11/4/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 140,488 | $171K | 11/4/2025 |
| Luke Evnin | ▼ Sell | Open Market | 60,369 | $78K | 11/3/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 94,063 | $121K | 11/3/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 94,063 | $121K | 11/3/2025 |
| Luke Evnin | ▼ Sell | Open Market | 73,192 | $94K | 10/31/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 114,044 | $146K | 10/31/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 114,044 | $146K | 10/31/2025 |
| Luke Evnin | ▼ Sell | Open Market | 55,795 | $80K | 10/30/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 86,936 | $124K | 10/30/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 86,936 | $124K | 10/30/2025 |
| Luke Evnin | ▼ Sell | Open Market | 86,154 | $134K | 10/29/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 134,240 | $208K | 10/29/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 134,240 | $208K | 10/29/2025 |
| Luke Evnin | ▼ Sell | Open Market | 44,327 | $73K | 10/28/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 69,068 | $113K | 10/28/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 69,068 | $113K | 10/28/2025 |
| Luke Evnin | ▼ Sell | Open Market | 46,664 | $80K | 10/27/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 72,709 | $125K | 10/27/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 72,709 | $125K | 10/27/2025 |
| RA CAPITAL MANAGEMENT, L.P. | ▲ Buy | Open Market | 162,539 | $159K | 5/14/2025 |
| RA CAPITAL MANAGEMENT, L.P. | ▲ Buy | Open Market | 52,974 | $52K | 5/13/2025 |
| RA CAPITAL MANAGEMENT, L.P. | ▲ Buy | Open Market | 320,913 | $276K | 5/12/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Open Market | 1,963 | $2K | 3/27/2025 |
| Luke Evnin | ▼ Sell | Other | 28,113 | $3K | 3/27/2025 |
| MPM BioVentures 2014, L.P. | ▼ Sell | Other | 22,758 | $2K | 3/27/2025 |
| Luke Evnin | ▼ Sell | Open Market | 2,425 | $3K | 3/27/2025 |
| Ansbert Gadicke | ▼ Sell | Other | 50,873 | $5K | 3/27/2025 |
| Ansbert Gadicke | ▼ Sell | Open Market | 4,386 | $5K | 3/27/2025 |
| RA CAPITAL MANAGEMENT, L.P. | ▲ Buy | Open Market | 1,853,000 | $4.1M | 1/6/2023 |
| Seidel-Dugan Cynthia | ▲ Buy | Option Exercise | 24,199 | $38K | 1/12/2022 |
| Seidel-Dugan Cynthia | ▲ Buy | Option Exercise | 15,532 | $74K | 1/12/2022 |
| Leonard Reid | ▲ Buy | Option Exercise | 14,102 | $22K | 12/30/2021 |
| Leonard Reid | ▼ Sell | Open Market | 2,865 | $38K | 12/15/2021 |
| Leonard Reid | ▼ Sell | Open Market | 135 | $2K | 12/15/2021 |
AI Market Commentary
AI-generatedAll commentary →Synthesized from recent news and fundamentals/technical data -- not human analyst commentary or trader sentiment.
October 8, 2026
No Relevant News for HOWL in Last Week
The only news item in the last week concerns HALO's expanded collaboration with ARGX. This development does not involve Werewolf Therapeutics, so it has no direct impact on HOWL's operations or outlook. Investors may focus on the company's own pipeline and financials for guidance.
No Relevant News for HOWL in Last Week. The only news item in the last week concerns HALO's expanded collaboration with ARGX. This development does not involve Werewolf Therapeutics, so it has no direct impact on HOWL's operations or outlook. Investors may focus on the company's own pipeline and financials for guidance.