Spero Therapeutics, Inc. insider trading
SPRO$1.16-0.03 (-2.52% today)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-44.5%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ1 '25Q2 '25Q3 '25Q4 '25Q1 '26Q2 '26
Unlock quarterly net flowKey players
- SSSath Shukla2.9826%
- EREsther Rajavelu1.6946%
- TKTimothy Keutzer1.275%
- AMAnkit Mahadevia1.2077%
- DZDebra Zack0.2787%
- MDMilind Deshpande0.1742%
- FEFrank E. Thomas0.146%
- CSCynthia Smith0.146%
- STScott Thomas Jackson0.146%
- KTKathleen Tregoning0.146%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| SPRO | Esther Rajavelu | Open market sell$63.4K | -2.5% | $2.51 | $63.4K | May 4, 2026 | May 6, 2026 |
| SPRO | Esther Rajavelu | Open market sell$120K | -4.8% | $2.36 | $120K | Feb 6, 2026 | Feb 9, 2026 |
| SPRO | Esther Rajavelu | Open market sell$87.6K | -3.4% | $2.36 | $87.6K | Feb 6, 2026 | Feb 9, 2026 |
| SPRO | Timothy Keutzer | Open market sell$44K | -2.5% | $2.36 | $44K | Feb 6, 2026 | Feb 9, 2026 |
| SPRO | Timothy Keutzer | Open market sell$7.78K | -0.5% | $2.24 | $7.78K | Feb 4, 2026 | Feb 5, 2026 |
| SPRO | Timothy Keutzer | Open market sell$51.8K | -3.1% | $2.14 | $51.8K | Feb 3, 2026 | Feb 5, 2026 |
| SPRO | Timothy Keutzer | Open market sell$41.6K | -2.3% | $2.20 | $41.6K | Feb 2, 2026 | Feb 5, 2026 |
| SPRO | Esther Rajavelu | Open market sell$40.6K | -1.7% | $2.20 | $40.6K | Feb 2, 2026 | Feb 4, 2026 |
| SPRO | Esther Rajavelu | Open market sell$95.4K | -4.4% | $2.37 | $95.4K | Nov 7, 2025 | Nov 12, 2025 |