Stuart A Arbuckle
CIK 1557290 · EVP, COO · last filed 2026-05-22
Stuart A Arbuckle is an EVP, COO who has filed 149 SEC Form 4 insider transactions across 6 companies since 2012. The most recent filing, for ALNY, was dated May 22, 2026. Across all open-market trades the lifetime net is −$139.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $29.4M 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.
$29.38M
6
149
-$139.91M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| ALNY | Director | 671 | $282.85 | $189.8K | $0 | 2 | 2026-05-22 |
| PRAX | Director | 1,166 | $266.58 | $310.8K | $0 | 1 | 2026-02-10 |
| VRTX | EVP, COO | 63,508 | $444.93 | $28.26M | -$139.91M | 122 | 2025-07-02 |
| RYTM | Director | 7,000 | $88.38 | $618.7K | $0 | 9 | 2025-06-26 |
| ImmunoGen, Inc. (IMGN) Delisted | Director | 0 | $31.23 | $0 | $0 | 11 | 2024-02-12 |
| Dare Bioscience, Inc. (CERU) Delisted | Director | 13,104 | — | — | $0 | 4 | 2017-01-05 |
Recent Filings
149 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-22 | ALNY | Grant (A) | +671 | $0 | EDGAR |
| 2026-02-10 | PRAX | Grant (A) | +1,166 | $0 | EDGAR |
| 2026-01-07 | ALNY | Grant (A) | — | $0 | EDGAR |
| 2025-07-02 | VRTX | Tax (F) | −37,243 | -$16.77M | EDGAR |
| 2025-06-26 | RYTM | Grant (A) | — | $0 | EDGAR |
| 2025-06-23 | RYTM | Exer (M) | +4,000 | $0 | EDGAR |
| 2025-05-15 | VRTX | Grant (A) | +37,622 | $0 | EDGAR |
| 2025-02-28 | VRTX | Tax (F) | −7,071 | -$3.39M | EDGAR |
| 2025-02-26 | VRTX | Tax (F) | −4,716 | -$2.28M | EDGAR |
| 2025-02-19 | VRTX | Tax (F) | −2,724 | -$1.26M | EDGAR |