Timothy Keutzer, Chief Operating Officer at Spero Therapeutics, Inc. (SPRO), sold 18,652 shares at $2.36 ($44K) on 2026-02-06, disclosed to the SEC on 2026-02-09.
Seasonal sale ($44k) by Chief Operating Officer — this insider has traded SPRO in February in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| SPRO | SELL | 2025-02-05 | $44K | — | Filing → |
| SPRO | SELL | 2024-08-29 | $3K | — | Filing → |
| SPRO | SELL | 2024-02-05 | $42K | — | Filing → |