Stuart A Arbuckle
CIK 1557290 · EVP, COO · last filed 2026-05-22
"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.
Loading insider history…
Disclosed Exposure
$29.38M
Companies
6
Total Filings
149
Lifetime Open-Market Net
-$139.91M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 5 of 15
149 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2022-08-10 | VRTX | Mixed | −3,764 | -$1.41M | EDGAR |
| 2022-06-17 | ImmunoGen, Inc. (IMGN) Delisted | Grant (A) | — | $0 | EDGAR |
| 2022-06-10 | RYTM | Grant (A) | — | $0 | EDGAR |
| 2022-05-18 | VRTX | Sell (S) | −133 | -$33.4K | EDGAR |
| 2022-05-04 | VRTX | Sell (S) | −306 | -$80.8K | EDGAR |
| 2022-02-28 | VRTX | Tax (F) | −7,246 | -$1.65M | EDGAR |
| 2022-02-22 | VRTX | Tax (F) | −4,126 | -$959.3K | EDGAR |
| 2022-02-14 | VRTX | Tax (F) | −3,040 | -$722.7K | EDGAR |
| 2022-02-03 | VRTX | Grant (A) | +38,375 | $0 | EDGAR |
| 2021-11-16 | VRTX | Sell (S) | −3 | -$562 | EDGAR |
Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.