Mark Chin
CIK 1734389 · last filed 2025-06-13
Mark Chin is a corporate insider who has filed 41 SEC Form 4 insider transactions across 5 companies since 2018. The most recent filing, for IRON, was dated Jun 13, 2025. Across all open-market trades the lifetime net is +$15.8M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $40.0M 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.
$40.01M
5
41
$15.77M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| IRON | Director | — | $67.99 | — | $0 | 3 | 2025-06-13 |
| Harpoon Therapeutics, Inc. (HARP) Delisted | Director | 2,572,359 | $23.01 | $59.19M | $352.3K | 16 | 2024-03-11 |
| Iterum Therapeutics plc (ITRM) Delisted | Director | 18,306 | $0.03 | $549 | $4.74M | 13 | 2023-06-15 |
| IMRA | Director | 2,344,072 | $17.02 | $39.89M | $11.00M | 4 | 2022-06-03 |
| PYXS | Director | 66,831 | $1.76 | $117.6K | -$324.6K | 4 | 2022-04-25 |
Recent Filings
41 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-06-13 | IRON | Grant (A) | — | $0 | EDGAR |
| 2024-06-14 | IRON | Grant (A) | — | $0 | EDGAR |
| 2024-03-11 | Harpoon Therapeutics, Inc. (HARP) Delisted | Mixed | −12,800 | $0 | EDGAR |
| 2024-01-03 | Harpoon Therapeutics, Inc. (HARP) Delisted | Grant (A) | +1,072 | $0 | EDGAR |
| 2023-11-28 | Harpoon Therapeutics, Inc. (HARP) Delisted | Grant (A) | +5,000 | $0 | EDGAR |
| 2023-10-02 | Harpoon Therapeutics, Inc. (HARP) Delisted | Grant (A) | +3,035 | $0 | EDGAR |
| 2023-07-06 | Harpoon Therapeutics, Inc. (HARP) Delisted | Grant (A) | +18,656 | $0 | EDGAR |
| 2023-06-23 | Harpoon Therapeutics, Inc. (HARP) Delisted | Grant (A) | — | $0 | EDGAR |
| 2023-06-15 | Iterum Therapeutics plc (ITRM) Delisted | Exer (M) | +15,853 | $0 | EDGAR |
| 2023-06-09 | IRON | Grant (A) | — | $0 | EDGAR |