Timothy Keutzer, Chief Operating Officer at Spero Therapeutics, Inc. (SPRO), sold 1,695 shares at $1.97 ($3K) on 2025-08-28, disclosed to the SEC on 2025-09-03.
Open-market sale of $3k SPRO by Chief Operating Officer. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.
| Filing → |
| SPRO | SELL | 2025-02-05 | $44K | — | Filing → |
| SPRO | SELL | 2024-08-29 | $3K | — | Filing → |
| SPRO | SELL | 2024-02-05 | $42K | — | Filing → |