STUMP DAVID C
Director · RGNX, MGNX
As of 2026-09-16, STUMP DAVID C has 13 Form 4 transactions on record across 2 companies — 6 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|
13 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-05-29 | RGNX | Award / grant | 9,807 | 28,861 | Form 4 |
| 2026-05-29 | RGNX | Award / grant | 46,600 | 46,600 | Form 4 |
| 2026-05-19 | MGNX | Award / grant | 22,000 | 22,000 | Form 4 |
| 2026-05-19 | MGNX | Award / grant | 3,750 | 3,750 | Form 4 |
| 2026-05-18 | MGNX | Option exercise | 3,750 | 0 | Form 4 |
| 2026-05-18 | MGNX | Option exercise | 3,750 | 14,750 | Form 4 |
| 2025-05-30 | RGNX | Award / grant | 39,815 | 39,815 | Form 4 |
| 2025-05-30 | RGNX | Award / grant | 7,768 | 19,054 | Form 4 |
| 2025-05-21 | MGNX | Award / grant | 22,000 | 22,000 | Form 4 |
| 2025-05-21 | MGNX | Award / grant | 3,750 | 3,750 | Form 4 |
| 2025-05-20 | MGNX | Option exercise | 6,500 | 0 | Form 4 |
| 2025-05-20 | MGNX | Option exercise | 6,500 | 11,000 | Form 4 |
| 2025-05-20 | MGNX | Option exercise | 6,500 | 11,000 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.