JAY PHILIP SIEGEL
CIK 1722857 · last filed 2026-05-20
JAY PHILIP SIEGEL is a corporate insider who has filed 12 SEC Form 4 insider transactions across 1 company since 2017. The most recent filing, for MGNX, was dated May 20, 2026. Current disclosed insider exposure totals $58.4K 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.
$58.4K
1
12
$0
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MGNX | Director | 14,750 | $3.96 | $58.4K | $0 | 12 | 2026-05-20 |
Recent Filings
12 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-20 | MGNX | Exer (M) | +3,750 | $0 | EDGAR |
| 2025-05-22 | MGNX | Mixed | +6,500 | $0 | EDGAR |
| 2024-05-23 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2024-05-22 | MGNX | Exer (M) | +4,500 | $0 | EDGAR |
| 2023-06-02 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2022-05-23 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2021-05-17 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2020-05-15 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2019-05-20 | MGNX | Grant (A) | — | $0 | EDGAR |
| 2019-05-20 | MGNX | Grant (A) | — | $0 | EDGAR |