Arrowhead Pharmaceuticals Inc (ARWR)
Who owns Arrowhead Pharmaceuticals Inc (ARWR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 87.2% of the shares are freely tradable; institutional investors hold 88.6%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 12.89 | 18,161,519 | -14.8 | 03/31/2026 |
| Vanguard Group Inc | 10.86 | 15,293,121 | -4.6 | 12/31/2025 |
| venBio Select Advisor LLC | 7.60 | 10,699,999 | +0.7 | 03/31/2026 |
| FMR Inc | 5.16 | 7,266,652 | +11.4 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.07 | 7,146,136 | +0.0 | 03/31/2026 |
| State Street Corp | 4.61 | 6,496,130 | +1.4 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.28 | 6,032,416 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 3.04 | 4,278,828 | +31.1 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.37 | 4,750,545 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.01 | 4,238,560 | +0.3 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 23. Apr 2026 | James C Hamilton | Insider | Sell | 10,000 | 75.00 | 750,000 |
| 22. Apr 2026 | Daniel Joseph Apel | CFO | Sell | 13,095 | 71.35 | 934,328 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.