SEC CIK 1214939
HEIDEN WILLIAM K
Reported ownership across 2 companies, sourced from SEC Form 4 filings and updated daily.
Current Positions
| Company | Shares Owned | As Of |
|---|---|---|
| MGNXview stock → | 114,750 | 2026-05-18 |
| ATRAview stock → | 34,188 | 2026-06-09 |
Position History — MGNX
Reported shares owned immediately after each Form 4 transaction, over time.
Recent Filings — MGNX
| Date | Activity | Shares | Price | Owned After |
|---|---|---|---|---|
| 2026-05-19 | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-18 | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | Option exercise | 3,750 | — | 114,750 |
| 2025-08-20 | Open-market buy | 49,500 | $1.49 | 111,000 |
| 2025-08-19 | Open-market buy | 50,500 | $1.52 | 61,500 |
| 2025-05-21 | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2025-05-21 | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2025-05-20 | Option exercise (derivative) | 6,500 | $0.00 | 0 |
| 2025-05-20 | Option exercise | 6,500 | — | 11,000 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.