Arrowhead Pharmaceuticals, Inc. (ARWR) ownership: insiders 4% · institutions 80% · index and ETF funds 10% (13F 2026-03-31). Insider activity, 90 days: 2 sales, 0 open-market buys. 1 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| BlackRock | 18161519.00 | $1.14B | 12.9% | 2026-03-31 |
| Vanguard | 14372280.00 | $901.14M | 10.2% | 2026-03-31 |
| Avoro Capital Advisors LLC | 10699999.00 | $670.89M | 7.6% | 2026-03-31 |
| FMR (Fidelity) | 7266652.00 | $455.62M | 5.1% | 2026-03-31 |
| State Street | 6496130.00 | $407.31M | 4.6% | 2026-03-31 |
| Geode Capital Management | 4278828.00 | $274.50M | 3.0% | 2026-03-31 |
| Fred Alger Management, LLC | 3342493.00 | $209.57M | 2.4% | 2026-03-31 |
| Invesco | 3280647.00 | $205.70M | 2.3% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-08-18 | |
| Sell | null | 2026-08-18 | |
| 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 |
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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.