David C. Stump
CIK: 0001191235
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (8 total)
- May 29, 2026RGNX
REGENXBIO Inc.
Award(A)Direct9.8K shares- - May 19, 2026MGNX
MACROGENICS INC
Award(A)DirectRestricted Stock Unit
3.8K shares- - May 19, 2026MGNX
MACROGENICS INC
Award(A)DirectStock Option (right to buy)
22K shares- - May 18, 2026MGNX
MACROGENICS INC
Exercise(M)Direct3.8K shares- - May 30, 2025RGNX
REGENXBIO Inc.
Award(A)Direct7.8K shares- - May 21, 2025MGNX
MACROGENICS INC
Award(A)DirectRestricted Stock Unit
3.8K shares- - May 21, 2025MGNX
MACROGENICS INC
Award(A)DirectStock Option (right to buy)
22K shares- - May 20, 2025MGNX
MACROGENICS INC
Exercise(M)Direct6.5K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| May 29, 2026 |  RGNX REGENXBIO Inc. | Award(A) | 9,807 | - | $0 | Direct |
| May 19, 2026 |  MGNX MACROGENICS INC | Award(A) Restricted Stock Unit | 3,750 | - | - | Direct |
| May 19, 2026 | MGNX MACROGENICS INC | Award(A) Stock Option (right to buy) | 22,000 | - | - | Direct |
| May 18, 2026 | MGNX MACROGENICS INC | Exercise(M) | 3,750 | - | $0 | Direct |
| May 30, 2025 | RGNX REGENXBIO Inc. | Award(A) | 7,768 | - | - | Direct |
| May 21, 2025 | MGNX MACROGENICS INC | Award(A) Restricted Stock Unit | 3,750 | - | - | Direct |
| May 21, 2025 | MGNX MACROGENICS INC | Award(A) Stock Option (right to buy) | 22,000 | - | - | Direct |
| May 20, 2025 | MGNX MACROGENICS INC | Exercise(M) | 6,500 | - | - | Direct |
1-8 of 8 transactions
About STUMP DAVID C
STUMP DAVID C (SEC CIK 0001191235) files insider reports with the SEC as Director of REGENXBIO Inc. (RGNX) and Director of MACROGENICS INC (MGNX).
Signal8 holds 4 ownership filings by STUMP DAVID C, all Form 4s, filed between May 22, 2025 and Jun 2, 2026. Those filings report 8 transactions, from May 20, 2025 to May 29, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on STUMP DAVID C's filings is in ROCKVILLE, MD.
Recent filings by STUMP DAVID C
- May 29, 2026: Grant or award of RGNX shares (Form 4, code A).
- May 19, 2026: Grants or awards of MGNX derivative securities (2 lines, Form 4, code A).
- May 18, 2026: Option exercise of MGNX shares (Form 4, code M).
- May 30, 2025: Grant or award of RGNX shares (Form 4, code A).
- May 21, 2025: Grants or awards of MGNX derivative securities (2 lines, Form 4, code A).
Other insiders filing for REGENXBIO Inc. (RGNX)
- Malzahn Craig, Chief Technology Officer
- Chan Mitchell, Chief Financial Officer
- Ciongoli Gregory Austin, Director
- PAKOLA STEVE, Chief Medical Officer
- Christmas Patrick J., Chief Strategy & Legal Officer
- Simpson Curran, Chief Executive Officer