WALTHAM, MA
WEREWOLF THERAPEUTICS, INC.HOWL— Latest position per institution from SEC 13F filings
15
Institutional holders
23.09M
Total shares held
30.53M
Estimated value
1.15M
Avg. position size
MPM ASSET MANAGEMENT LLC
CIK 1263048
Shares
4.31M
Value
8.49M
Filed
Sep 30, 2025
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
2.39M
Value
859.35K
Filed
Jun 30, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
2M
Value
4.24M
Filed
Sep 30, 2024
BALYASNY ASSET MANAGEMENT L.P.
CIK 1218710
Shares
1.79M
Value
644.25K
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.59M
Value
3.87M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
1.41M
Value
892.70K
Filed
Dec 31, 2025
RUBRIC CAPITAL MANAGEMENT LP
CIK 1687509
Shares
1.33M
Value
1.30M
Filed
Mar 31, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.22M
Value
438.47K
Filed
Jun 30, 2026
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 1009258
Shares
958.13K
Value
4.32K
Filed
Sep 30, 2022
MONASHEE INVESTMENT MANAGEMENT LLC
CIK 1627608
Shares
890K
Value
5.77M
Filed
Mar 31, 2024
EAGLE HEALTH INVESTMENTS LP
CIK 1842545
Shares
700K
Value
1.48M
Filed
Sep 30, 2024
RENAISSANCE TECHNOLOGIES LLC
CIK 1037389
Shares
674.63K
Value
242.80K
Filed
Jun 30, 2026
LYNX1 CAPITAL MANAGEMENT LP
CIK 1910456
Shares
657.79K
Value
236.74K
Filed
Jun 30, 2026
SPHERA FUNDS MANAGEMENT LTD.
CIK 1496201
Shares
626.81K
Value
225.59K
Filed
Jun 30, 2026
DC FUNDS, LP
CIK 1869028
Shares
589.10K
Value
212.02K
Filed
Jun 30, 2026
SQUADRON CAPITAL MANAGEMENT LLC
CIK 2050709
Shares
563.53K
Value
469.20K
Filed
Mar 31, 2026
PFM HEALTH SCIENCES, LP
CIK 1442756
Shares
401.11K
Value
790.19K
Filed
Sep 30, 2025
VERDAD ADVISERS, LP
CIK 1812822
Shares
348.71K
Value
125.50K
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
335.81K
Value
120.89K
Filed
Jun 30, 2026
BANK OF AMERICA CORP /DE/
CIK 70858
Shares
311.50K
Value
111.83K
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | MPM ASSET MANAGEMENT LLC | 1263048 | 4.31M | 8.49M | Sep 30, 2025 |
| 2 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 2.39M | 859.35K | Jun 30, 2026 |
| 3 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 2M | 4.24M | Sep 30, 2024 |
| 4 | BALYASNY ASSET MANAGEMENT L.P. | 1218710 | 1.79M | 644.25K | Jun 30, 2026 |
| 5 | BLACKROCK FINANCE, INC. | 1364742 | 1.59M | 3.87M | Jun 30, 2024 |
| 6 | VANGUARD GROUP INC | 102909 | 1.41M | 892.70K | Dec 31, 2025 |
| 7 | RUBRIC CAPITAL MANAGEMENT LP | 1687509 | 1.33M | 1.30M | Mar 31, 2025 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.22M | 438.47K | Jun 30, 2026 |
| 9 | DEERFIELD MANAGEMENT COMPANY, L.P. | 1009258 | 958.13K | 4.32K | Sep 30, 2022 |
| 10 | MONASHEE INVESTMENT MANAGEMENT LLC | 1627608 | 890K | 5.77M | Mar 31, 2024 |
| 11 | EAGLE HEALTH INVESTMENTS LP | 1842545 | 700K | 1.48M | Sep 30, 2024 |
| 12 | RENAISSANCE TECHNOLOGIES LLC | 1037389 | 674.63K | 242.80K | Jun 30, 2026 |
| 13 | LYNX1 CAPITAL MANAGEMENT LP | 1910456 | 657.79K | 236.74K | Jun 30, 2026 |
| 14 | SPHERA FUNDS MANAGEMENT LTD. | 1496201 | 626.81K | 225.59K | Jun 30, 2026 |
| 15 | DC FUNDS, LP | 1869028 | 589.10K | 212.02K | Jun 30, 2026 |
| 16 | SQUADRON CAPITAL MANAGEMENT LLC | 2050709 | 563.53K | 469.20K | Mar 31, 2026 |
| 17 | PFM HEALTH SCIENCES, LP | 1442756 | 401.11K | 790.19K | Sep 30, 2025 |
| 18 | VERDAD ADVISERS, LP | 1812822 | 348.71K | 125.50K | Jun 30, 2026 |
| 19 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 335.81K | 120.89K | Jun 30, 2026 |
| 20 | BANK OF AMERICA CORP /DE/ | 70858 | 311.50K | 111.83K | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.