SEC Form 4 · Updated Daily
MGNX
— MACROGENICS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Koenig Scott | Director | 867,240 | 2026-02-15 | M |
| Karrels James | Officer | 206,037 | 2026-02-15 | F |
| Bonvini Ezio | Officer | 185,799 | 2026-08-17 | M |
| HEIDEN WILLIAM K | Director | 114,750 | 2026-05-18 | M |
| Risser Eric Blasius | Director · Officer | 77,169 | 2026-02-15 | F |
| HURWITZ EDWARD | Director | 47,824 | 2026-05-18 | M |
| Spitznagel Thomas | Officer | 38,543 | 2026-02-15 | F |
| O'Brien Federica F. | Director | 14,750 | 2026-05-18 | M |
| STUMP DAVID C | Director | 14,750 | 2026-05-18 | M |
| Liu Margaret | Director | 14,750 | 2026-05-18 | M |
| Chhabra Meenu | Director | 14,750 | 2026-05-18 | M |
| Jackson Scott Thomas | Director | 14,750 | 2026-05-18 | M |
| Ferrante Karen Jean | Director | 14,750 | 2026-05-18 | M |
| SIEGEL JAY PHILIP | Director | 14,750 | 2026-05-18 | M |
| Smith Beth Ann | Officer | 12,781 | 2026-02-15 | F |
| Peters Jeffrey Stuart | Officer | 0 | 2026-08-19 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-08-19 | Peters Jeffrey Stuart | Open-market sale | 31,105 | $4.15 | 0 |
| 2026-08-17 | Bonvini Ezio | Option exercise (derivative) | 40,000 | $2.60 | 88,000 |
| 2026-08-17 | Bonvini Ezio | Option exercise | 40,000 | $2.60 | 185,799 |
| 2026-05-19 | Koenig Scott | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Koenig Scott | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | Ferrante Karen Jean | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Ferrante Karen Jean | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | STUMP DAVID C | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | STUMP DAVID C | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | HURWITZ EDWARD | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | HURWITZ EDWARD | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | Chhabra Meenu | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | Chhabra Meenu | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Liu Margaret | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Liu Margaret | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | HEIDEN WILLIAM K | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | HEIDEN WILLIAM K | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | Jackson Scott Thomas | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-19 | Jackson Scott Thomas | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | O'Brien Federica F. | Grant / award (derivative) | 3,750 | $0.00 | 3,750 |
| 2026-05-19 | O'Brien Federica F. | Grant / award (derivative) | 22,000 | $0.00 | 22,000 |
| 2026-05-18 | Ferrante Karen Jean | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | Ferrante Karen Jean | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | STUMP DAVID C | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | STUMP DAVID C | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | HURWITZ EDWARD | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | HURWITZ EDWARD | Option exercise | 3,750 | — | 47,824 |
| 2026-05-18 | Chhabra Meenu | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | Chhabra Meenu | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | Liu Margaret | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | Liu Margaret | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | SIEGEL JAY PHILIP | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | SIEGEL JAY PHILIP | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | HEIDEN WILLIAM K | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | HEIDEN WILLIAM K | Option exercise | 3,750 | — | 114,750 |
| 2026-05-18 | Jackson Scott Thomas | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | Jackson Scott Thomas | Option exercise | 3,750 | — | 14,750 |
| 2026-05-18 | O'Brien Federica F. | Option exercise (derivative) | 3,750 | $0.00 | 0 |
| 2026-05-18 | O'Brien Federica F. | Option exercise | 3,750 | — | 14,750 |
| 2026-02-15 | Koenig Scott | Option exercise (derivative) | 21,165 | $0.00 | 0 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.