SEC Form 4 · Updated Daily
ARWR
— ARROWHEAD PHARMACEUTICALS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Anzalone Christopher Richard | Director · Officer | 3,792,739 | 2026-01-02 | S |
| O'Brien Patrick | Officer | 547,408 | 2026-01-06 | A |
| Hamilton James C | Officer | 226,958 | 2026-04-23 | S |
| Apel Daniel Joseph | Officer | 162,905 | 2026-04-22 | S |
| PERRY MICHAEL S | Director | 111,459 | 2026-08-18 | S |
| Ferrari Mauro | Director | 69,053 | 2025-12-26 | S |
| Waddill William D. | Director | 56,563 | 2025-12-19 | S |
| Lu Hongbo | Director | 52,012 | 2026-05-12 | S |
| INGRAM DOUGLAS S | Director | 46,215 | 2025-12-16 | A |
| Vakiener Victoria | Director | 35,723 | 2025-12-19 | S |
| OLUKOTUN ADEOYE Y | Director | 31,600 | 2026-08-18 | S |
| Cohen Matthew Gregory | Director | 11,882 | 2026-06-15 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-18 | PERRY MICHAEL S | Open-market sale | 11,600 | $87.30 | 111,459 |
| 2026-08-18 | OLUKOTUN ADEOYE Y | Open-market sale | 2,000 | $86.96 | 31,600 |
| 2026-06-15 | Cohen Matthew Gregory | Grant / award | 11,882 | $0.00 | 11,882 |
| 2026-05-12 | Lu Hongbo | Open-market sale | 2,970 | $76.88 | 52,012 |
| 2026-04-23 | Hamilton James C | Open-market sale | 10,000 | $75.00 | 226,958 |
| 2026-04-22 | Apel Daniel Joseph | Open-market sale | 8,730 | $71.92 | 162,905 |
| 2026-04-22 | Apel Daniel Joseph | Open-market sale | 1,157 | $70.45 | 171,635 |
| 2026-04-22 | Apel Daniel Joseph | Open-market sale | 3,208 | $70.11 | 172,792 |
| 2026-03-05 | Hamilton James C | Open-market sale | 10,000 | $64.19 | 236,958 |
| 2026-01-06 | O'Brien Patrick | Grant / award | 75,000 | $0.00 | 547,408 |
| 2026-01-06 | O'Brien Patrick | Gift | 440 | $0.00 | 472,408 |
| 2026-01-06 | O'Brien Patrick | Gift | 440 | $0.00 | 472,848 |
| 2026-01-06 | O'Brien Patrick | Gift | 540 | $0.00 | 473,288 |
| 2026-01-06 | O'Brien Patrick | Gift | 540 | $0.00 | 473,828 |
| 2026-01-06 | O'Brien Patrick | Gift | 540 | $0.00 | 474,368 |
| 2026-01-06 | Apel Daniel Joseph | Grant / award | 75,000 | $0.00 | 176,200 |
| 2026-01-06 | Hamilton James C | Grant / award | 75,000 | $0.00 | 246,958 |
| 2026-01-05 | Hamilton James C | Open-market sale | 309 | $68.00 | 171,958 |
| 2026-01-05 | Hamilton James C | Open-market sale | 437 | $65.97 | 172,267 |
| 2026-01-05 | Hamilton James C | Open-market sale | 1,200 | $64.49 | 172,704 |
| 2026-01-05 | Hamilton James C | Open-market sale | 12,711 | $63.95 | 173,904 |
| 2026-01-05 | Hamilton James C | Open-market sale | 14,792 | $63.01 | 186,615 |
| 2026-01-05 | Hamilton James C | Open-market sale | 6,090 | $62.28 | 201,407 |
| 2026-01-05 | Hamilton James C | Open-market sale | 4,625 | $61.24 | 207,497 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 46 | $68.00 | 474,908 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 2,336 | $64.04 | 474,954 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 5,873 | $62.91 | 477,290 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 900 | $62.25 | 483,163 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 600 | $61.12 | 484,063 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 313 | $68.00 | 484,663 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 900 | $66.01 | 484,976 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 2,700 | $64.44 | 485,876 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 11,842 | $63.84 | 488,576 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 13,451 | $62.96 | 500,418 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 6,164 | $62.23 | 513,869 |
| 2026-01-05 | O'Brien Patrick | Open-market sale | 4,368 | $61.20 | 520,033 |
| 2026-01-02 | Anzalone Christopher Richard | Open-market sale | 5,771 | $66.39 | 3,792,739 |
| 2026-01-02 | Anzalone Christopher Richard | Open-market sale | 7,416 | $65.88 | 3,798,510 |
| 2025-12-31 | O'Brien Patrick | Gift | 560 | $0.00 | 524,401 |
| 2025-12-31 | O'Brien Patrick | Gift | 560 | $0.00 | 524,961 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.