13F

Stock

Werewolf Therapeutics, Inc.

HOWL · held by 48 managers

Reported value

$11.6M

Holders

48

+7 new · −12 exited

Holders’ est. mark

$2.35M

Price effect on 38 books still in the name

Largest holder

$5.56M

RA CAPITAL MANAGEMENT, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
RA CAPITAL MANAGEMENT, L.P.6.68M$5.56M$1.33MAdded$1.33M
VANGUARD CAPITAL MANAGEMENT LLC1.22M$1.01MHeld
MPM BIOIMPACT LLC1.21M$1.01M$240.1KAdded$122.9K
Lynx1 Capital Management LP657.8K$547.7K$130.6KAdded$132.1K
SPHERA FUNDS MANAGEMENT LTD.626.8K$521.9K$124.8KAdded$124.8K
DC Funds, LP589.1K$490.5K$117.3KAdded$117.3K
Squadron Capital Management LLC563.5K$469.2KNew
Renaissance Technologies516.2K$429.8K$102.8KAdded$438
GEODE CAPITAL MANAGEMENT, LLC389.5K$324.4K$66.9KAdded$111.5K
BANK OF AMERICA CORP /DE/264.6K$220.1K$52.7KCut−$246.7K
VANGUARD FIDUCIARY TRUST CO157.7K$131.4KHeld
MILLENNIUM MANAGEMENT LLC132.1K$109.9K$26.3KCut−$42.2K
State Street119.2K$99.2K$23.7KAdded$23.7K
BlackRock, Inc.101.6K$84.6K$20.2KAdded$20.2K
NORTHERN TRUST CORP86.9K$72.3K$17.3KAdded$17.3K
Alyeska Investment Group, L.P.86.6K$72.1K$17.2KCut−$77.3K
JANE STREET GROUP, LLC82.8K$69K$16.5KCut−$30.7K
BRIDGEWAY CAPITAL MANAGEMENT, LLC77K$64.1K$15.3KAdded$15.3K
UBS Group AG66.9K$55.7K$12.1KAdded$17.3K
XTX Topco Ltd50.9K$42.4KNew
GOLDMAN SACHS GROUP INC38.3K$31.9K$6.78KAdded$10.3K
MORGAN STANLEY33.8K$28.1K$6.73KCut−$1K
SIMPLEX TRADING, LLC32.5K$27.1K$4.79KAdded$11.8K
Verdad Advisers, LP29.8K$24.8KNew
RAYMOND JAMES FINANCIAL INC19.8K$16.5KNew
CERTUITY, LLC15K$12.5K$2.99KAdded$2.99K
Delta Investment Management, LLC14.9K$12.4K$2.97KAdded$2.97K
BARCLAYS PLC13.2K$11K$2.63KAdded$2.63K
Larson Financial Group LLC13.1K$10.9K$2.6KAdded$2.6K
Ranch Capital Advisors Inc.12K$9.99K$2.39KAdded$2.39K
HBK Sorce Advisory LLC13.2K$8.99K$896Added$896
Citadel10.4K$8.64KNew
Vanguard Global Advisers, LLC10.3K$8.62KHeld
Cetera Investment Advisers10.2K$8.49K$2.03KAdded$2.03K
LPL Financial LLC10K$8.33KNew
OSAIC HOLDINGS, INC.8.63K$7.16K$1.72KAdded$1.73K
Financial Perspectives, Inc6.75K$5.62K$1.34KAdded$1.34K
TFC Financial Management, Inc.4.5K$3.75K$896Added$896
CITIGROUP INC3.38K$2.82K−$0Added$2.82K
JPMORGAN CHASE & CO2.1K$1.67K$338Added$357
GROUP ONE TRADING LLC1.87K$1.56K$373Added$373
BNP PARIBAS FINANCIAL MARKETS790$658$157Added$156
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO200$167$0Added$164
SBI Securities Co., Ltd.80$67$9Added$42
Fidelity39$32$7Cut−$2.27K
Arax Advisory Partners12$32$24Added$7
Optiver Holding B.V.22$18$4Added$4
HRT FINANCIAL LP17.9K$14New

Who left

Positions as of Q1 2026. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.