Werewolf Therapeutics, Inc. - Common Stock (HOWL) Institutional Ownership

13F Institutional Holders and Ownership History from Q2 2021 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
HOWL on Nasdaq
Shares outstanding
48,821,304
Price per share
$0.63
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
21,108,242
Total reported value
$41,572,612
% of total 13F portfolios
0%
Share change
-1,214,496
Value change
-$2,126,394
Number of holders
62
Price from insider filings
$0.63
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Werewolf Therapeutics, Inc. - Common Stock (HOWL) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
RA CAPITAL MANAGEMENT, L.P. 14% -8% $13,162,175 -$129,035 6,681,307 -0.97% RA Capital Management, L.P. 04 Nov 2025
MPM BioVentures 2014, L.P. 6.9% -16% $2,136,074 -$386,130 3,368,670 -15% ANSBERT GADICKE 14 Jan 2026
PFM Health Sciences, LP 0.9% -80% $437,210 -$2,729,747 401,110 -86% PFM Health Sciences, LP 30 Jun 2025

As of 30 Sep 2025, 62 institutional investors reported holding 21,108,242 shares of Werewolf Therapeutics, Inc. - Common Stock (HOWL). This represents 43% of the company’s total 48,821,304 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of Werewolf Therapeutics, Inc. - Common Stock (HOWL) together control 43% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
RA CAPITAL MANAGEMENT, L.P. 14% 6,681,307 0% 0.16% $13,162,175
MPM ASSET MANAGEMENT LLC 8.8% 4,309,860 0% 19% $8,490,424
MPM BIOIMPACT LLC 4.9% 2,408,810 0% 0.78% $4,745,356
BANK OF AMERICA CORP /DE/ 3.7% 1,830,292 -14% 0% $3,605,675
VANGUARD GROUP INC 2.9% 1,408,047 +8.5% 0% $2,773,852
SPHERA FUNDS MANAGEMENT LTD. 1.3% 626,810 0% 0.29% $1,234,816
DC Funds, LP 1.2% 589,102 0% 37% $1,160,531
RENAISSANCE TECHNOLOGIES LLC 0.93% 456,000 +44% 0% $898,320
PFM Health Sciences, LP 0.82% 401,110 0% 0.07% $790,187
GEODE CAPITAL MANAGEMENT, LLC 0.68% 330,787 +0.86% 0% $651,832
MILLENNIUM MANAGEMENT LLC 0.65% 317,053 -54% 0% $624,594
JANE STREET GROUP, LLC 0.55% 268,577 -28% 0% $529,097
Alyeska Investment Group, L.P. 0.48% 235,705 0% 0% $464,339
CITADEL ADVISORS LLC 0.32% 154,534 0% $304,432
STATE STREET CORP 0.24% 119,168 0% 0% $234,761
BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.21% 102,000 0% 0% $200,940
BlackRock, Inc. 0.21% 101,323 -72% 0% $199,606
SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.19% 93,041 +17% 0% $183,291
NORTHERN TRUST CORP 0.13% 65,836 0% 0% $129,697
GOLDMAN SACHS GROUP INC 0.12% 60,341 -73% 0% $118,872
EDGEWOOD MANAGEMENT LLC 0.1% 50,000 0% 0% $98,500
Cubist Systematic Strategies, LLC 0.1% 46,711 0% $92,020
HRT FINANCIAL LP 0.08% 39,859 -6.2% 0% $78,000
Vontobel Holding Ltd. 0.07% 36,000 -10% 0% $70,920
TWO SIGMA ADVISERS, LP 0.07% 34,600 -39% 0% $68,162

Institutional Holders of Werewolf Therapeutics, Inc. - Common Stock (HOWL) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 12,345 $7,821 +$3,781 $0.63 2
2025 Q3 21,108,242 $41,572,612 -$2,126,394 $1.97 62
2025 Q2 22,335,758 $24,343,246 -$5,335,449 $1.09 65
2025 Q1 27,445,533 $26,679,025 -$940,155 $0.97 70
2024 Q4 28,177,146 $41,701,476 -$7,785,512 $1.48 71
2024 Q3 32,205,548 $68,274,106 -$1,018,677 $2.12 68
2024 Q2 32,469,409 $79,220,415 -$5,272,473 $2.44 70
2024 Q1 32,251,087 $208,968,732 +$29,830,206 $6.48 59
2023 Q4 27,669,999 $106,805,060 +$14,923,168 $3.86 41
2023 Q3 23,882,934 $51,107,776 -$364,729 $2.14 34
2023 Q2 24,045,139 $73,334,928 +$110,396 $3.05 36
2023 Q1 24,035,818 $62,491,910 +$8,454,617 $2.60 37
2022 Q4 20,890,957 $42,845,289 -$4,124,677 $2.05 37
2022 Q3 20,956,559 $94,490,128 +$8,517,407 $4.51 39
2022 Q2 19,071,418 $78,002,023 +$194,911 $4.09 39
2022 Q1 18,982,797 $83,522,100 -$5,015,169 $4.40 47
2021 Q4 19,103,784 $227,525,761 -$818,751 $11.91 50
2021 Q3 18,418,726 $316,117,290 -$12,884,754 $17.16 41
2021 Q2 19,169,179 $334,041,360 +$334,041,360 $17.44 44