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Buy GRAL
Grail Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -97.50. In total, the insiders bought 236.78K and sold 55.82M GRAL 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
|
-97.50 |
| ● Buy | 236.78K shares |
| ● Sell | 55.82M shares |
|
36% Buy Activity
Negligible or No Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
Feb 27, 2026 Buy |
Freidin Aaron Chief Financial Officer |
60 118 Value: $3.20M |
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|
Feb 27, 2026 Buy |
Ofman Joshua J. President |
84 540 Value: $4.50M |
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|
Jan 15, 2026 Buy |
Mizell Steven Director |
206 Value: $20.1K |
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Jan 15, 2026 Buy |
Summe Gregory L Director |
329 Value: $32.1K |
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|
Jan 15, 2026 Buy |
Chase William J Director |
213 Value: $20.8K |
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Dec 03, 2025 Sell |
Freidin Aaron Chief Financial Officer |
25 000 Value: $2.48M |
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|
Dec 03, 2025 Sell |
Ragusa Robert P Chief Executive Officer |
1 604 Value: $156.0K |
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Dec 03, 2025 Sell |
Ragusa Robert P Chief Executive Officer |
8 233 Value: $792.2K |
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|
Dec 03, 2025 Sell |
Ragusa Robert P Chief Executive Officer |
15 356 Value: $1.46M |
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|
Dec 03, 2025 Sell |
Ragusa Robert P Chief Executive Officer |
14 807 Value: $1.40M |
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Dec 03, 2025 Sell |
Ofman Joshua J. President |
13 000 Value: $1.30M |
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Nov 17, 2025 Sell |
Freidin Aaron Chief Financial Officer |
1 697 Value: $134.4K |
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|
Nov 17, 2025 Sell |
Illumina, Inc. 10 Percent Owner |
1 000 000 Value: $79.9M |
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Oct 16, 2025 Sell |
Ofman Joshua J. President |
6 114 Value: $501.4K |
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Oct 15, 2025 Sell |
Ragusa Robert P Chief Executive Officer |
7 239 Value: $498.6K |
||
|
Oct 15, 2025 Buy |
Mizell Steven Director |
267 Value: $20.2K |
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|
Oct 15, 2025 Sell |
Ofman Joshua J. President |
8 865 Value: $674.0K |
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|
Oct 15, 2025 Buy |
Summe Gregory L Director |
425 Value: $32.1K |
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|
Oct 15, 2025 Buy |
Chase William J Director |
275 Value: $20.8K |
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|
Oct 06, 2025 Sell |
Ofman Joshua J. President |
81 385 Value: $5.09M |
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|
Oct 06, 2025 Sell |
Ofman Joshua J. President |
81 385 Value: $5.09M |
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|
Oct 02, 2025 Sell |
Ofman Joshua J. President |
9 692 Value: $620.3K |
||
|
Oct 02, 2025 Sell |
Ofman Joshua J. President |
9 692 Value: $620.3K |
||
|
Aug 19, 2025 Sell |
Ofman Joshua J. President |
4 202 Value: $134.5K |
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|
Aug 19, 2025 Sell |
Freidin Aaron Chief Financial Officer |
877 Value: $28.1K |
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
