13F Insight
DOSSIER · 13F Holders · Q3 2025
HOWL

WEREWOLF THERAPEUTICS INC

49 institutions still hold WEREWOLF THERAPEUTICS INC as of Q3 2025. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 95075A107·49 13F holders·last filed Sep 30, 2025
Market cap
—
13F value held
$12M
visible holders
Holders
49
filers reporting
Concentration
69.42%
MPM ASSET MANAGEMENT LLC #1
top holder share
AI Holders Summary · Q3 2025

49 institutions reported HOWL in Q3 2025. MPM ASSET MANAGEMENT LLC leads at 69.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
MPM ASSET MANAGEMENT LLC
CIK 0001263048
$8M4.3M19.96%Q3 202502
RA CAPITAL MANAGEMENT, L.P.
CIK 0001346824
$859K2.4M0.01%Q2 202603
BALYASNY ASSET MANAGEMENT L.P.
CIK 0001218710
$644K1.8M0.00%Q2 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$438K1.2M0.00%Q2 202605
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$243K675K0.00%Q2 202606
Lynx1 Capital Management LP
CIK 0001910456
$237K658K0.03%Q2 202607
SPHERA FUNDS MANAGEMENT LTD.
CIK 0001496201
$226K627K0.03%Q2 202608
DC Funds, LP
CIK 0001869028
$212K589K16.92%Q2 202609
Verdad Advisers, LP
CIK 0001812822
$126K349K0.12%Q2 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$121K336K0.00%Q2 202611
BANK OF AMERICA CORP /DE/
CIK 0000070858
$112K312K0.00%Q2 202612
XTX Topco Ltd
CIK 0001828301
$98K271K0.00%Q2 202613
UBS Group AG
CIK 0001610520
$78K216K0.00%Q2 202614
JANE STREET GROUP, LLC
CIK 0001595888· Market maker
$69K83K0.00%Q1 202615
VANGUARD FIDUCIARY TRUST CO
CIK 0000933478· Index
$57K158K0.00%Q2 202616
Vontobel Holding Ltd.
CIK 0001588340
$55K60K0.00%Q3 202617
Vilga Financial Planning LLC
CIK 0002083456
$49K53K0.03%Q3 202618
STATE STREET CORP
CIK 0000093751
$43K119K0.00%Q2 202619
Squarepoint Ops LLC
CIK 0001642575
$37K103K0.00%Q2 202620
BlackRock, Inc.
CIK 0002012383
$37K102K0.00%Q2 2026
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