THOMAS FRANK E
SEC insider (Form 3/4/5 filer). CIK 0001242616. Director at Spero Therapeutics, Inc. (SPRO) and 1 other issuer. 5 reported Form 4/5 transactions since Sep 2024; latest on Jun 23, 2026. Located in CAMBRIDGE, MA.
Companies THOMAS FRANK E has filed insider reports for
- Spero Therapeutics, Inc. (SPRO): Director
- Larimar Therapeutics, Inc. (LRMR): Director
THOMAS FRANK E
CIK: 0001242616
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 (5 total)
- Jun 23, 2026SPRO
Spero Therapeutics, Inc.
AwardDirect10K shares- - May 19, 2026LRMR
Larimar Therapeutics, Inc.
AwardDirectStock Option (Right to Buy)
55.2K shares- - Feb 27, 2026LRMR
Larimar Therapeutics, Inc.
PurchaseDirect5K shares at avg. $5.00$25K - Jun 12, 2025SPRO
Spero Therapeutics, Inc.
AwardDirect20K shares- - May 13, 2025LRMR
Larimar Therapeutics, Inc.
AwardDirectStock Option (Right to Buy)
19K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jun 23, 2026 |  SPRO Spero Therapeutics, Inc. | Award | 10,000 | - | $0 | Direct |
| May 19, 2026 |  LRMR Larimar Therapeutics, Inc. | Award Stock Option (Right to Buy) | 55,150 | - | - | Direct |
| Feb 27, 2026 | LRMR Larimar Therapeutics, Inc. | Purchase | 5,000 | $5.00 | $25,000 | Direct |
| Jun 12, 2025 | SPRO Spero Therapeutics, Inc. | Award | 20,000 | - | - | Direct |
| May 13, 2025 | LRMR Larimar Therapeutics, Inc. | Award Stock Option (Right to Buy) | 19,000 | - | - | Direct |
1-5 of 5 transactions