Patrick O'Brien
CIK 1627183 · COO · last filed 2026-01-08
Patrick O'Brien is a COO who has filed 21 SEC Form 4 insider transactions across 1 company since 2014. The most recent filing, for ARWR, was dated Jan 8, 2026. Across all open-market trades the lifetime net is −$20.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $35.2M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$35.24M
1
21
-$20.67M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ARWR | COO | 472,848 | $74.52 | $35.24M | -$20.67M | 21 | 2026-01-08 |
Recent Filings
21 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-01-08 | ARWR | Mixed | +72,500 | $0 | EDGAR |
| 2026-01-05 | ARWR | Mixed | −52,293 | -$3.12M | EDGAR |
| 2025-01-07 | ARWR | Mixed | +62,816 | -$736.1K | EDGAR |
| 2024-01-05 | ARWR | Mixed | +51,810 | -$1.14M | EDGAR |
| 2023-01-06 | ARWR | Sell (S) | −15,000 | -$560.9K | EDGAR |
| 2023-01-05 | ARWR | Mixed | +47,500 | -$670.8K | EDGAR |
| 2022-12-22 | ARWR | Exer (M) | +32,000 | $196.8K | EDGAR |
| 2022-01-07 | ARWR | Mixed | −33,300 | -$2.01M | EDGAR |
| 2022-01-04 | ARWR | Mixed | +88,000 | $172.2K | EDGAR |
| 2021-02-10 | ARWR | Mixed | — | -$7.49M | EDGAR |