13F

Stock

Arrowhead Pharmaceuticals In

Ticker not mapped · held by 51 managers

Reported value

$624.7M

Holders

51

+51 new · −0 exited

Holders’ est. mark

—

Need a prior quarter

Largest holder

$207.2M

DEERFIELD MANAGEMENT COMPANY, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Who holds it

Notable only
InvestorSharesValueEst. markChange
DEERFIELD MANAGEMENT COMPANY, L.P.200M$207.2M—New
Linden Advisors LP92.4M$95.8M—New
CAMDEN ASSET MANAGEMENT L P /CA45.5M$47.1M—New
LMR Partners LLP35M$36.2M—New
READYSTATE ASSET MANAGEMENT LP25M$25.9M—New
Calamos Advisors LLC22.7M$23.6M—New
Jump Financial, LLC18.7M$19.3M—New
Context Capital Management, LLC14.9M$15.5M—New
BNP PARIBAS FINANCIAL MARKETS14M$14.5M—New
State Street13.7M$14.2M—New
OAKTREE CAPITAL MANAGEMENT LP11.1M$11.5M—New
LOOMIS SAYLES & CO L P172.2K$10.8M—New
Polar Asset Management Partners Inc.10M$10.4M—New
SHENKMAN CAPITAL MANAGEMENT INC8.71M$9.18M—New
Point72 Asset Management, L.P.7.78M$8.06M—New
Fidelity7.18M$7.43M—New
SSI INVESTMENT MANAGEMENT LLC6.59M$6.81M—New
JPMORGAN CHASE & CO6.52M$6.49M—New
VOYA INVESTMENT MANAGEMENT LLC5.26M$5.46M—New
UBS Group AG4.2M$4.34M—New
CITIGROUP INC3.52M$3.64M—New
MILLENNIUM MANAGEMENT LLC3.38M$3.49M—New
Invesco Ltd.3.25M$3.36M—New
MACKAY SHIELDS LLC3M$3.11M—New
GOLDMAN SACHS GROUP INC3M$3.1M—New
STATE OF WISCONSIN INVESTMENT BOARD3M$3.1M—New
BRAIDWELL LP2.25M$2.33M—New
GABELLI FUNDS LLC2.09M$2.28M—New
TENOR CAPITAL MANAGEMENT Co., L.P.2M$2.07M—New
FRANKLIN RESOURCES INC1.65M$1.71M—New
JANE STREET GROUP, LLC1.5M$1.56M—New
RWC Asset Management LLP1.38M$1.43M—New
AGF MANAGEMENT LTD1.25M$1.29M—New
Bank of New York Mellon Corp1.22M$1.26M—New
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main1M$1.04M—New
Davidson Kempner Capital Management LP1M$1.03M—New
ADAR1 Capital Management, LLC10K$1.02M—New
GROUPAMA ASSET MANAGMENT1M$991.4K—New
Ares Systematic Credit Ltd1M$990.9K—New
TORONTO DOMINION BANK953K$984K—New
Man Group plc950K$983.7K—New
WELLS FARGO & COMPANY/MN860K$890.9K—New
NOMURA HOLDINGS INC14K$874.9K—New
Kohlberg Kravis Roberts & Co. L.P.800K$829.7K—New
MORGAN STANLEY695K$719K—New
BANK OF AMERICA CORP /DE/500K$517.3K—New
Acasta Partners UK LLP400K$414.6K—New
LAZARD ASSET MANAGEMENT LLC8.81M$91.3K—New
SEI INVESTMENTS CO32K$33.1K—New
Amundi3.1M$3.21K—New
SG Americas Securities, LLC6.9K$715—New

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.