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Total Value
$406.7K
Net $101.2K sold
Filing Date
Feb 5, 2026
4 transactions
Sales
$101.2K
3 transactions
Trade Summary
On Feb 2, 2026 through Feb 4, 2026, Keutzer Timothy, Insider, sold $406.7K of Spero Therapeutics, Inc. (SPRO) across 4 transactions. The filing covers Common Stock and reflects net selling of $101.2K. Reported prices ranged from $2.14 to $2.24. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.
Company Information
- Company Name
- Spero Therapeutics, Inc.
- Ticker Symbol
- SPRO
- CIK
- 0001701108
Insider Information
- Name
- Keutzer Timothy
- Role
- Insider
- Location
- CAMBRIDGE, MA
Filing Details
- Filing Date
- Feb 5, 2026
- Transaction Date
- Feb 2, 2026
- Accession Number
- 0001193125-26-038441
- Form Type
- 4
- Net Trading Amount
- -$101.2K
Non-Derivative Transactions
| Date | Security | Shares | Price | Type | Value |
|---|---|---|---|---|---|
| Feb 2, 2026 | Common Stock | 68,000 | — | Grant/Award | — |
| Feb 2, 2026 | Common Stock | 18,891 | $2.20 | Sale | $41.6K |
| Feb 3, 2026 | Common Stock | 24,224 | $2.14 | Sale | $51.8K |
| Feb 4, 2026 | Common Stock | 3,471 | $2.24 | Sale | $7.8K |
Derivative Transactions
| Date | Security | Shares | Exercise Price | Type | Value |
|---|---|---|---|---|---|
| Feb 2, 2026 | SPRO derivative | 137,000 | $2.23 | Grant/Award | $305.5K |
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Footnotes
- (F1)Consists of restricted stock units ("RSUs") granted to Reporting Person under Issuer's 2017 Stock Incentive Plan. Each RSU represents the right to receive one share of common stock upon vesting. The RSUs vest in four equal annual installments beginning on February 2, 2027, subject to the Reporting Person's continued service through the applicable vesting date.
- (F2)Represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. The sale occurred automatically to satisfy the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.
- (F3)The shares underlying this option vest as to 25% on February 2, 2027, with the remainder vesting in 36 equal monthly installments thereafter, subject to the Reporting Person's continued service through the applicable vesting date.