Werewolf Therapeutics, Inc. - HOWL

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
DC Funds, LP History No change 589,102 490,486 33.01% 25.69% 1 0 0.0% Q1 2026 May 14, 2026
RA CAPITAL MANAGEMENT, L.P. History No change 6,681,307 5,562 0.06% 0.04% 2 0 0.0% Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 1,217,976 1,014 0.0% 3 +1,217,976 New Q1 2026 May 15, 2026
MPM BioImpact LLC History Reduced 1,208,810 1,006 0.08% 0.1% 4 -184,747 -13.26% Q1 2026 May 15, 2026
VANGUARD GROUP INC History No change 1,408,047 892 0.0% 0.0% 5 0 0.0% Q4 2025 Jan 29, 2026
Lynx1 Capital Management LP History Added to 657,786 547 0.09% 0.08% 6 +1,860 0.28% Q1 2026 May 01, 2026
SPHERA FUNDS MANAGEMENT LTD. History No change 626,810 521 0.08% 0.08% 7 0 0.0% Q1 2026 May 15, 2026
Squadron Capital Management LLC History New 563,535 469 0.17% 8 +563,535 New Q1 2026 May 15, 2026
RENAISSANCE TECHNOLOGIES LLC History Reduced 516,218 429 0.0% 0.0% 9 -161,548 -23.84% Q1 2026 May 14, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 389,487 324 0.0% 0.0% 10 +53,601 15.96% Q1 2026 May 15, 2026
BANK OF AMERICA CORP /DE/ History Reduced 264,583 220 0.0% 0.0% 11 -472,967 -64.13% Q1 2026 May 15, 2026
VANGUARD FIDUCIARY TRUST CO History New 157,726 131 0.0% 12 +157,726 New Q1 2026 May 08, 2026
MILLENNIUM MANAGEMENT LLC History Reduced 132,050 109 0.0% 0.0% 13 -108,059 -45.0% Q1 2026 May 15, 2026
STATE STREET CORP History No change 119,168 99 0.0% 0.0% 14 0 0.0% Q1 2026 May 15, 2026
BlackRock, Inc. History Reduced 101,608 84 0.0% 0.0% 15 -35 -0.03% Q1 2026 May 13, 2026
Alyeska Investment Group, L.P. History Reduced 86,554 72 0.0% 0.0% 17 -149,151 -63.28% Q1 2026 May 15, 2026
NORTHERN TRUST CORP History No change 86,851 72 0.0% 0.0% 16 0 0.0% Q1 2026 May 14, 2026
JANE STREET GROUP, LLC History Reduced 82,836 68 0.0% 0.0% 18 -74,486 -47.35% Q1 2026 May 12, 2026
BRIDGEWAY CAPITAL MANAGEMENT, LLC History No change 77,000 64 0.0% 0.0% 19 0 0.0% Q1 2026 May 15, 2026
UBS Group AG History Added to 66,857 55 0.0% 0.0% 20 +6,149 10.13% Q1 2026 May 05, 2026
XTX Topco Ltd History New 50,929 42 0.0% 21 +50,929 New Q1 2026 May 15, 2026
GOLDMAN SACHS GROUP INC History Added to 38,266 31 0.0% 0.0% 22 +4,193 12.31% Q1 2026 May 15, 2026
MORGAN STANLEY History Reduced 33,799 28 0.0% 0.0% 23 -12,203 -26.53% Q1 2026 May 15, 2026
SIMPLEX TRADING, LLC History Added to 32,526 27 0.0% 0.0% 24 +8,472 35.22% Q1 2026 May 14, 2026
Verdad Advisers, LP History New 29,760 24 0.03% 25 +29,760 New Q1 2026 May 15, 2026
RAYMOND JAMES FINANCIAL INC History New 19,778 16 0.0% 26 +19,778 New Q1 2026 May 14, 2026
HRT FINANCIAL LP History New 17,861 14 0.0% 27 +17,861 New Q1 2026 May 14, 2026
Delta Investment Management, LLC History No change 14,925 12 0.0% 0.0% 28 0 0.0% Q1 2026 May 12, 2026
CERTUITY, LLC History No change 15,000 12 0.0% 0.0% 29 0 0.0% Q1 2026 May 11, 2026
BARCLAYS PLC History Reduced 13,235 11 0.0% 0.0% 30 -1 -0.01% Q1 2026 May 14, 2026
Larson Financial Group LLC History No change 13,052 10 0.0% 0.0% 31 0 0.0% Q1 2026 May 15, 2026
Ranch Capital Advisors Inc. History No change 12,000 9 0.0% 0.0% 32 0 0.0% Q1 2026 May 06, 2026
CITADEL ADVISORS LLC History New 10,382 8 0.0% 36 +10,382 New Q1 2026 May 15, 2026
Vanguard Global Advisers, LLC History New 10,343 8 0.0% 37 +10,343 New Q1 2026 May 08, 2026
LPL Financial LLC History New 10,000 8 0.0% 35 +10,000 New Q1 2026 May 06, 2026
HBK Sorce Advisory LLC History No change 13,227 8 0.0% 0.0% 33 0 0.0% Q1 2026 May 11, 2026
Cetera Investment Advisers History No change 10,200 8 0.0% 0.0% 34 0 0.0% Q1 2026 May 13, 2026
OSAIC HOLDINGS, INC. History No change 8,625 7 0.0% 0.0% 38 0 0.0% Q1 2026 May 15, 2026
TWO SIGMA ADVISERS, LP History No change 10,300 6 0.0% 0.0% 39 0 0.0% Q4 2025 Feb 17, 2026
Financial Perspectives, Inc History No change 6,750 5 0.0% 0.0% 40 0 0.0% Q1 2026 May 11, 2026
TFC Financial Management, Inc. History No change 4,500 3 0.0% 0.0% 41 0 0.0% Q1 2026 Apr 23, 2026
CITIGROUP INC History Added to 3,384 2 0.0% 42 +3,383 338300.0% Q1 2026 May 11, 2026
JPMORGAN CHASE & CO History Added to 2,096 1 0.0% 0.0% 43 +24 1.16% Q1 2026 May 13, 2026
GROUP ONE TRADING LLC History No change 1,871 1 0.0% 0.0% 44 0 0.0% Q1 2026 May 13, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Closed out 0 0 0.0% -99,829 -100.0% Q1 2026 May 15, 2026
Vontobel Holding Ltd. History Closed out 0 0 0.0% -60,003 -100.0% Q1 2026 May 08, 2026
Regal Investment Advisors LLC History Closed out 0 0 0.0% -52,593 -100.0% Q1 2026 May 14, 2026
EDGEWOOD MANAGEMENT LLC History Closed out 0 0 0.0% -50,000 -100.0% Q1 2026 May 14, 2026
Point72 Asset Management, L.P. History Closed out 0 0 0.0% -14,483 -100.0% Q1 2026 May 15, 2026
Engineers Gate Manager LP History Closed out 0 0 0.0% -12,185 -100.0% Q1 2026 May 15, 2026
HIGHLINE WEALTH PARTNERS LLC History Closed out 0 0 0.0% -12,000 -100.0% Q1 2026 Apr 06, 2026
StoneX Group Inc. History Closed out 0 0 0.0% -10,511 -100.0% Q1 2026 May 14, 2026
FEDERATED HERMES, INC. History Closed out 0 0 0.0% -4,387 -100.0% Q1 2026 May 11, 2026
FMR LLC History Reduced 39 0 0.0% -3,592 -98.93% Q1 2026 May 15, 2026
NISA INVESTMENT ADVISORS, LLC History Closed out 0 0 -345 -100.0% Q1 2026 Apr 30, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History Added to 200 0 +196 4900.0% Q1 2026 May 07, 2026
ROYAL BANK OF CANADA History Closed out 0 0 -62 -100.0% Q1 2026 May 15, 2026
SBI Securities Co., Ltd. History Added to 80 0 +40 100.0% Q1 2026 Apr 27, 2026
Arax Advisory Partners History Reduced 12 0 -27 -69.23% Q1 2026 May 13, 2026
BNP PARIBAS FINANCIAL MARKETS History Reduced 790 0 -2 -0.25% Q1 2026 May 12, 2026
Optiver Holding B.V. History No change 22 0 0 0.0% Q1 2026 Jun 02, 2026