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Buy SPRO
Spero Therapeutics Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -37.48. In total, the insiders bought 5.69M and sold 1.25M SPRO shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.
Insider Power
|
-37.48 |
| ● Buy | 5.69M shares |
| ● Sell | 1.25M shares |
|
50% Buy Activity
Moderate Positive Correlation
|
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
May 29, 2024 Buy |
Deshpande Milind Director |
20 000 Value: $0 |
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|
May 29, 2024 Buy |
Jackson Scott Thomas Director |
20 000 Value: $0 |
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May 29, 2024 Buy |
Mahadevia Ankit Director |
20 000 Value: $0 |
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|
May 29, 2024 Buy |
Vink Patrick V.j.j. Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Tregoning Kathleen Director |
20 000 Value: $0 |
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May 29, 2024 Buy |
Smith Cynthia Director |
20 000 Value: $0 |
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|
May 29, 2024 Buy |
Thomas Frank E Director |
20 000 Value: $0 |
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May 29, 2024 Buy |
Pottage John C Jr Director |
20 000 Value: $0 |
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May 29, 2024 Buy |
Pottage John C Jr Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Thomas Frank E Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Smith Cynthia Director |
20 000 Value: $0 |
||
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May 29, 2024 Buy |
Tregoning Kathleen Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Vink Patrick V.j.j. Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Mahadevia Ankit Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Jackson Scott Thomas Director |
20 000 Value: $0 |
||
|
May 29, 2024 Buy |
Deshpande Milind Director |
20 000 Value: $0 |
||
|
Feb 02, 2024 Sell |
Keutzer Timothy Chief Operating Officer |
30 971 Value: $42.1K |
||
|
Feb 02, 2024 Sell |
Mahadevia Ankit Director |
63 795 Value: $87.4K |
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Feb 02, 2024 Sell |
Joseph Tamara L Chief Legal Officer |
30 906 Value: $42.3K |
||
|
Feb 02, 2024 Sell |
Mahadevia Ankit Director |
63 795 Value: $87.4K |
||
|
Feb 02, 2024 Sell |
Keutzer Timothy Chief Operating Officer |
30 971 Value: $42.1K |
||
|
Feb 01, 2024 Buy |
Keutzer Timothy Chief Operating Officer |
239 731 Value: $0 |
||
|
Feb 01, 2024 Buy |
Joseph Tamara L Chief Legal Officer |
239 731 Value: $0 |
||
|
Feb 01, 2024 Buy |
Hamed Kamal Chief Medical Officer |
239 731 Value: $0 |
||
|
Feb 01, 2024 Buy |
Joseph Tamara L Chief Legal Officer |
239 731 Value: $0 |
About Insider Power
Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.
It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.
While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.
* October 6th, 2025 - Tested on 5562 stocks
