Arrowhead Pharmaceuticals, Inc. (ARWR) ownership: Top institutional holder: BlackRock, Inc. ($1.14B). Insider activity: Net Seller (0 buys, 20 sells). 1 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 18161519.00 | $1.14B | 2026-03-31 |
| VANGUARD GROUP INC | 15293121.00 | $1.02B | 2025-12-31 |
| Avoro Capital Advisors LLC | 10699999.00 | $670.89M | 2026-03-31 |
| FMR LLC | 7266652.00 | $455.62M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 7146136.00 | $448.06M | 2026-03-31 |
| STATE STREET CORP | 6496130.00 | $407.31M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6032416.00 | $378.23M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 4278828.00 | $274.50M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-15 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-04-23 | |
| Sell | null | 2026-04-23 | |
| Sell | null | 2026-04-22 | |
| Sell | null | 2026-04-22 | |
| Sell | null | 2026-04-22 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.