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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 -94.05. In total, the insiders bought 476.82K and sold 316.67K 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
|
-94.05 |
| ● Buy | 476.82K shares |
| ● Sell | 316.67K shares |
|
49% Buy Activity
Weak Negative Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
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 |
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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 |
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May 11, 2026 Buy |
Flammer Martina M.d. Chief Medical Officer |
12 949 Value: $221.0K |
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|
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 |
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|
May 04, 2026 Buy |
Lewis William Chair And CEO |
4 440 Value: $76.2K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
433 Value: $58.1K |
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|
May 04, 2026 Buy |
Lewis William Chair And CEO |
4 440 Value: $76.2K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
381 Value: $53.2K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
1 247 Value: $173.4K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
2 721 Value: $375.1K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
5 318 Value: $728.6K |
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May 04, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
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May 04, 2026 Sell |
Lewis William Chair And CEO |
599 Value: $81.0K |
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|
May 04, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
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|
Apr 16, 2026 Buy |
Lewis William Chair And CEO |
4 440 Value: $76.2K |
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Apr 16, 2026 Sell |
Lewis William Chair And CEO |
2 246 Value: $321.2K |
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|
Apr 16, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
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|
Apr 16, 2026 Sell |
Lewis William Chair And CEO |
5 373 Value: $772.7K |
||
|
Apr 16, 2026 Sell |
Lewis William Chair And CEO |
2 255 Value: $326.2K |
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Apr 16, 2026 Sell |
Lewis William Chair And CEO |
825 Value: $120.3K |
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|
Apr 16, 2026 Buy |
Lewis William Chair And CEO |
6 259 Value: $190.6K |
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
