Timothy Keutzer, Chief Development Officer at Spero Therapeutics, Inc. (SPRO), sold 1,854 shares at $1.26 ($2K) on 2023-08-28, disclosed to the SEC on 2023-08-30.
Open-market sale of $2k SPRO by Chief Development 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 | 2025-09-03 | $3K | — | Filing → |
| SPRO | SELL | 2025-02-05 | $44K | — | Filing → |
| SPRO | SELL | 2024-08-29 | $3K | — | Filing → |