Keutzer Timothy (CIK 1798155) reported 10 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-02-09). Recent activity: Sell SPRO (18,652 shares), Buy SPRO (68,000 shares), Sell SPRO (18,891 shares), Sell SPRO (24,224 shares), Sell SPRO (3,471 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-09 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 18,652 | $44,019 |
| 2026-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Buy | 68,000 | $0 |
| 2026-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 18,891 | $41,560 |
| 2026-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 24,224 | $51,839 |
| 2026-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 3,471 | $7,775 |
| 2025-09-03 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 1,695 | $3,339 |
| 2025-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Buy | 266,139 | $0 |
| 2025-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 3,974 | $3,100 |
| 2025-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 27,643 | $21,562 |
| 2025-02-05 | Spero Therapeutics, Inc. (SPRO) | Chief Operating Officer | Sell | 24,920 | $19,438 |
Source: SEC Form 4 filings · as of 2026-02-09