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Buy INSM
Insmed Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -95.02. In total, the insiders bought 463.08K and sold 356.62K INSM 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
|
-95.02 |
| ● Buy | 463.08K shares |
| ● Sell | 356.62K shares |
|
50% Buy Activity
Moderate Negative Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
May 22, 2026 Sell |
Smith Michael Alexander Chief Legal Officer |
6 149 Value: $667.0K |
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|
May 18, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
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|
May 18, 2026 Sell |
Lewis William Chair And CEO |
7 975 Value: $853.1K |
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May 18, 2026 Sell |
Lewis William Chair And CEO |
11 836 Value: $1.26M |
||
|
May 18, 2026 Sell |
Lewis William Chair And CEO |
5 753 Value: $605.9K |
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|
May 18, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
||
|
May 18, 2026 Buy |
Lewis William Chair And CEO |
4 440 Value: $76.2K |
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May 18, 2026 Buy |
Lewis William Chair And CEO |
4 440 Value: $76.2K |
||
|
May 14, 2026 Sell |
Flammer Martina M.d. Chief Medical Officer |
10 479 Value: $1.23M |
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|
May 13, 2026 Buy |
Lee Leo Director |
3 305 Value: $390.0K |
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May 13, 2026 Buy |
Desjardins Clarissa Director |
3 305 Value: $390.0K |
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May 13, 2026 Buy |
Brennan David R Director |
3 305 Value: $390.0K |
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May 13, 2026 Buy |
Sharoky Melvin Md Director |
3 305 Value: $390.0K |
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|
May 13, 2026 Sell |
Smith Michael Alexander Chief Legal Officer |
4 109 Value: $477.4K |
||
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May 13, 2026 Sell |
Flammer Martina M.d. Chief Medical Officer |
3 384 Value: $393.2K |
||
|
May 13, 2026 Sell |
Flammer Martina M.d. Chief Medical Officer |
4 470 Value: $504.0K |
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May 13, 2026 Sell |
Lewis William Chair And CEO |
13 283 Value: $1.54M |
||
|
May 13, 2026 Sell |
Adsett Roger Chief Operating Officer |
5 837 Value: $678.1K |
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|
May 13, 2026 Buy |
Schafer Carol Director |
3 305 Value: $390.0K |
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May 13, 2026 Sell |
Bonstein Sara Chief Financial Officer |
8 272 Value: $961.0K |
||
|
May 13, 2026 Buy |
Anderson Elizabeth M Director |
3 305 Value: $390.0K |
||
|
May 11, 2026 Buy |
Flammer Martina M.d. Chief Medical Officer |
12 949 Value: $221.0K |
||
|
May 11, 2026 Buy |
Flammer Martina M.d. Chief Medical Officer |
12 949 Value: $221.0K |
||
|
May 11, 2026 Sell |
Flammer Martina M.d. Chief Medical Officer |
830 Value: $84.0K |
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|
May 11, 2026 Sell |
Flammer Martina M.d. Chief Medical Officer |
12 119 Value: $1.22M |
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
