ARWR

ARROWHEAD PHARMACEUTICALS, INC.

Pharmaceutical PreparationsNasdaqLarge accelerated filer

Total Trades

76

Buys

1

Sells

61

Largest Trade

N/A

Insiders

14

Institutional Funds

330

Inst. Value

$1M+

Activist Filings

21

Insider Trades

InsiderTitleTypeValueSharesPriceDate
O'Brien PatrickCOOSELL$1M+49K$63.11Jan 6, 2026
Hamilton James CChief Medical Offi…SELL$1M+40K$63.11Jan 6, 2026
Anzalone Christopher RichardCEOSELL$500K+13K$66.10Jan 6, 2026
Anzalone Christopher RichardCEOEXERCISE$100K–$500K52K$6.15Dec 30, 2025
Anzalone Christopher RichardCEOSELL$1M+52K$69.13Dec 30, 2025
Ferrari MauroDirectorSELL$500K+8K$70.00Dec 30, 2025
Waddill William D.DirectorSELL$500K+8K$67.65Dec 23, 2025
Vakiener VictoriaDirectorSELL$500K+10K$67.68Dec 23, 2025
Anzalone Christopher RichardCEOSELL$1M+26K$68.04Dec 23, 2025
OLUKOTUN ADEOYE YDirectorSELL$500K+10K$67.66Dec 23, 2025
Anzalone Christopher RichardCEOSELL$1M+85K$64.04Dec 19, 2025
Anzalone Christopher RichardCEOGRANTN/A180KDec 16, 2025
Anzalone Christopher RichardCEOSELL$1M+184K$67.00Dec 16, 2025
PERRY MICHAEL SDirectorSELL$500K+16K$61.03Dec 9, 2025
Ferrari MauroDirectorSELL$100K–$500K9K$56.39Dec 1, 2025
Hamilton James CChief Medical Offi…SELL$100K–$500K15K$30.00Sep 16, 2025
Hamilton James CChief Medical Offi…SELL$100K–$500K15K$25.00Sep 4, 2025
Anzalone Christopher RichardCEOSELL$1M+141K$10.87Apr 11, 2025
Anzalone Christopher RichardCEOSELL$500K+51K$15.07Mar 17, 2025
Anzalone Christopher RichardCEOGRANTN/A340KMar 17, 2025
OLUKOTUN ADEOYE YDirectorSELL$15K–$50K959$21.00Jan 28, 2025
Hamilton James CChief Discovery/Tr…SELL$500K+33K$19.82Jan 8, 2025
Hamilton James CChief Discovery/Tr…GRANTN/A100KJan 8, 2025
O'Brien PatrickCOO and General Co…SELL$500K+37K$19.80Jan 8, 2025
O'Brien PatrickCOO and General Co…GRANTN/A100KJan 8, 2025
Myszkowski Kenneth AllenCFOSELL$500K+45K$19.77Jan 8, 2025
Myszkowski Kenneth AllenCFOGRANTN/A100KJan 8, 2025
Anzalone Christopher RichardCEOSELL$100K–$500K12K$19.05Jan 6, 2025
OLUKOTUN ADEOYE YDirectorSELL$50K–$100K3K$20.00Dec 30, 2024
Anzalone Christopher RichardCEOSELL$100K–$500K13K$19.59Dec 23, 2024
Anzalone Christopher RichardCEOGRANTN/A100KDec 20, 2024
Anzalone Christopher RichardCEOSELL$500K+27K$21.24Dec 20, 2024
Oliver TracieChief Commercial O…SELL$100K–$500K9K$25.28Jul 3, 2024
Hamilton James CChief Discovery/Tr…SELL$100K–$500K6K$28.03Apr 3, 2024
Lu HongboDirectorBUY$50K–$100K3K$27.66Mar 20, 2024
Anzalone Christopher RichardCEOEXERCISE$500K+57K$14.54Feb 2, 2024
Anzalone Christopher RichardCEOSELL$1M+57K$32.35Feb 2, 2024
Hamilton James CChief Discovery/Tr…SELL$100K–$500K8K$36.89Jan 17, 2024
GIVEN DOUGLAS BDirectorSELL$100K–$500K3K$38.06Jan 16, 2024
Waddill William D.DirectorSELL$100K–$500K4K$38.07Jan 16, 2024
Ferrari MauroDirectorSELL$100K–$500K3K$38.06Jan 16, 2024
Vakiener VictoriaDirectorSELL$100K–$500K5K$38.10Jan 16, 2024
Anzalone Christopher RichardCEOSELL$100K–$500K10K$31.01Jan 4, 2024
Anzalone Christopher RichardCEOSELL$100K–$500K12K$28.54Dec 22, 2023
San Martin JavierChief Medical Offi…SELL$500K+20K$28.80Nov 22, 2023
Anzalone Christopher RichardCEOSELL$500K+24K$24.21Oct 27, 2023
Vakiener VictoriaDirectorSELL$15K–$50K2K$26.33Oct 2, 2023
Anzalone Christopher RichardCEOSELL$1M+58K$28.12Sep 20, 2023
Anzalone Christopher RichardCEOEXERCISE$100K–$500K58K$4.75Sep 20, 2023
Oliver TracieChief Commercial O…SELL$100K–$500K9K$35.31Jul 6, 2023
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Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

BlackRock, Inc.

SC 13G/A · Jan 21, 2026

15.0%

20.3M shares

Sarepta Therapeutics, Inc.

SC 13D/A · Aug 15, 2025

0.0%

0 shares

Avoro Capital Advisors LLC

SC 13G/A · Aug 14, 2025

8.3%

11.5M shares

STATE STREET CORPORATION

SC 13G · Aug 11, 2025

4.6%

6.4M shares

The Vanguard Group

SC 13G/A · Jul 29, 2025

11.2%

15.5M shares

STATE STREET CORPORATION

SC 13G · May 13, 2025

5.1%

7.0M shares

BlackRock, Inc.

SC 13G/A · Apr 24, 2025

13.8%

19.0M shares

Sarepta Therapeutics, Inc.

SC 13D · Feb 14, 2025

9.5%

11.9M shares

Avoro Capital Advisors LLC

SC 13G/A · Feb 14, 2025

9.6%

12.0M shares

STATE STREET CORPORATION

SC 13G · Feb 5, 2025

4.8%

6.0M shares

Avoro Capital Advisors LLC

SC 13G · Nov 14, 2024

7.2%

8.9M shares

STATE STREET CORPORATION 04-2456637

SC 13G/A · Oct 16, 2024

5.1%

6.4M shares

The Vanguard Group - 23-1945930

SC 13G/A · Apr 10, 2024

10.0%

12.4M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

9.9%

10.7M shares

BlackRock, Inc.

SC 13G/A · Jan 23, 2024

12.4%

13.3M shares

The Vanguard Group - 23-1945930

SC 13G/A · Jun 9, 2023

10.1%

10.8M shares

BlackRock, Inc.

SC 13G/A · Jan 26, 2023

12.0%

12.7M shares

BlackRock, Inc.

SC 13G · Jan 20, 2023

12.0%

12.7M shares

BlackRock, Inc.

SC 13G/A · Jan 27, 2022

11.5%

12.0M shares

BlackRock, Inc.

SC 13G/A · Jan 25, 2022

11.5%

12.0M shares

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