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

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.