Jackson Scott Thomas
SEC insider (Form 3/4/5 filer). CIK 0001566617. Director at Spero Therapeutics, Inc. (SPRO) and 2 other issuers. 12 reported Form 4/5 transactions since Sep 2024; latest on Jun 23, 2026. Located in CAMBRIDGE, MA.
Companies Jackson Scott Thomas has filed insider reports for
- Spero Therapeutics, Inc. (SPRO): Director
- MACROGENICS INC (MGNX): Director
- Mural Oncology plc (MURA): Director
Jackson Scott Thomas
CIK: 0001566617
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 (12 total)
- Jun 23, 2026SPRO
Spero Therapeutics, Inc.
AwardDirect10K shares- - May 19, 2026MGNX
MACROGENICS INC
AwardDirectRestricted Stock Unit
3.8K shares- - May 19, 2026MGNX
MACROGENICS INC
AwardDirectStock Option (right to buy)
22K shares- - May 18, 2026MGNX
MACROGENICS INC
ExerciseDirect3.8K shares- - Dec 5, 2025MURA
Mural Oncology plc
DispositionDirectStock Option (right to buy)
8.6K shares- - Dec 5, 2025MURA
Mural Oncology plc
DispositionDirectStock Option (right to buy)
8.5K shares- - Dec 5, 2025MURA
Mural Oncology plc
DispositionDirectStock Option (right to buy)
15K shares- - Jun 12, 2025SPRO
Spero Therapeutics, Inc.
AwardDirect20K shares- - Jun 11, 2025MURA
Mural Oncology plc
AwardDirectStock Option (right to buy)
8.6K shares- - May 21, 2025MGNX
MACROGENICS INC
AwardDirectStock Option (right to buy)
22K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 23, 2026 |  SPRO Spero Therapeutics, Inc. | Award | 10,000 | - | $0 | Direct |
| May 19, 2026 |  MGNX MACROGENICS INC | Award Restricted Stock Unit | 3,750 | - | - | Direct |
| May 19, 2026 | MGNX MACROGENICS INC | Award Stock Option (right to buy) | 22,000 | - | - | Direct |
| May 18, 2026 | MGNX MACROGENICS INC | Exercise | 3,750 | - | $0 | Direct |
| Dec 5, 2025 |  MURA Mural Oncology plc | Disposition Stock Option (right to buy) | 8,637 | - | - | Direct |
| Dec 5, 2025 | MURA Mural Oncology plc | Disposition Stock Option (right to buy) | 8,462 | - | - | Direct |
| Dec 5, 2025 | MURA Mural Oncology plc | Disposition Stock Option (right to buy) | 15,021 | - | - | Direct |
| Jun 12, 2025 | SPRO Spero Therapeutics, Inc. | Award | 20,000 | - | - | Direct |
| Jun 11, 2025 | MURA Mural Oncology plc | Award Stock Option (right to buy) | 8,637 | - | - | Direct |
| May 21, 2025 | MGNX MACROGENICS INC | Award Stock Option (right to buy) | 22,000 | - | - | Direct |
1-10 of 12 transactions