| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Koenig Scott | Director | 9704 MEDICAL CENTER DRIVE, ROCKVILLE | /s/ Beth A. Smith, Attorney-in-fact | 10 Feb 2026 | 0001587514 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MGNX | Common Stock | Options Exercise | +15,831 | +1.9% | 846,075 | 08 Feb 2026 | Direct | F1 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | MGNX | Restricted Stock Unit | Options Exercise | $0 | -15,831 | -50% | $0.000000 | 15,832 | 08 Feb 2026 | Common Stock | 15,831 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Restricted stock units convert into the Company's stock on a one-for-one basis. |
| F2 | On February 8, 2024, the reporting person was granted 95,000 restricted stock units. One-third of the restricted stock units vested after one year and one-half of the remaining units vested pursuant to the reporting person's "Separation Agreement" on August 13, 2025. The remaining units vest in two equal installments on the anniversary of the grant date. |