Patrick O'Brien is CLO at ARROWHEAD RESEARCH CORP (ARWR). They have made 11 open-market trades across 2 companies since 2019, most recently 2026-06-23.
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 11 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ARWR | 547,408 | $30.6M |
| GLRE | 208,633 | $3.1M |
| Total | $33.7M |
Shares reported on the most recent Form 4, priced at the 2026-06-25 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GLRE | SELL | 2026-06-23 | 2026-06-25 | $16.36 | $50K | +2.8% | +6.0% | -7.3% |
| ARWR | SELL | 2026-01-05 | 2026-01-05 | $63.11 | $3.1M | -8.1% | -5.6% | -15.2% |
| GLRE | SELL | 2025-05-12 | 2025-05-14 | $13.33 | $267K | +6.4% | +10.8% | +0.2% |
| ARWR | SELL · 10b5-1 | 2025-01-06 | 2025-01-07 | $19.81 | $1.3M | +2.3% | +6.0% | -46.9% |
| ARWR | SELL · 10b5-1 | 2024-01-03 | 2024-01-05 | $34.32 | $1.9M | -5.5% | -8.8% | -25.6% |
| ARWR | SELL | 2023-01-05 | 2023-01-06 | $37.39 | $280K | +12.9% | +11.5% | -12.9% |
| ARWR | SELL | 2023-01-03 | 2023-01-05 | $38.28 | $1.3M | -3.9% | -10.6% | -32.6% |
| ARWR | SELL | 2022-01-05 | 2022-01-07 | $61.38 | $2.8M | -9.8% | -10.5% | -15.8% |
| ARWR | SELL | 2021-02-08 | 2021-02-10 | $88.46 | $15.9M | -8.1% | -18.2% | -21.5% |
| ARWR | SELL | 2021-01-06 | 2021-01-07 | $72.41 | $3.6M | +5.8% | +12.1% | -19.6% |
| ARWR | SELL | 2020-01-06 | 2020-01-08 | $60.12 | $1.8M | -21.3% | -33.1% | -51.4% |
| ARWR | SELL | 2019-05-28 | 2019-05-29 | $24.88 | $746K | +5.7% | +5.5% | +31.1% |
| ARWR | SELL | 2019-01-18 | 2019-01-18 | $14.43 | $1.0M | -1.3% | +26.8% | +27.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.