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Buy HALO
Halozyme Therapeutics Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -68.58. In total, the insiders bought 721.01K and sold 251.08K HALO 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
|
-68.58 |
| ● Buy | 721.01K shares |
| ● Sell | 251.08K shares |
|
54% Buy Activity
Weak Negative Correlation
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Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
May 11, 2026 Buy |
Torley Helen President And CEO |
20 000 Value: $241.4K |
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|
May 11, 2026 Sell |
Torley Helen President And CEO |
6 700 Value: $444.4K |
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May 05, 2026 Buy |
Henderson Jeffrey William Director |
3 796 Value: $250.0K |
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May 05, 2026 Buy |
Henderson Jeffrey William Director |
6 040 Value: $397.9K |
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|
May 05, 2026 Buy |
Duncan Barbara Gayle Director |
3 796 Value: $250.0K |
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May 05, 2026 Buy |
Duncan Barbara Gayle Director |
6 040 Value: $397.9K |
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|
May 05, 2026 Buy |
Posard Matthew L. Director |
3 796 Value: $250.0K |
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May 05, 2026 Buy |
Posard Matthew L. Director |
6 040 Value: $397.9K |
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|
May 05, 2026 Buy |
Krishnan Mahesh Director |
3 796 Value: $250.0K |
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May 05, 2026 Buy |
Lang James Paul Director |
3 796 Value: $250.0K |
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May 05, 2026 Buy |
Lang James Paul Director |
6 040 Value: $397.9K |
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May 05, 2026 Buy |
Krishnan Mahesh Director |
6 040 Value: $397.9K |
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May 05, 2026 Buy |
Connaughton Bernadette Director |
6 040 Value: $397.9K |
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May 05, 2026 Buy |
Connaughton Bernadette Director |
6 796 Value: $447.7K |
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May 01, 2026 Sell |
Connaughton Bernadette Director |
1 625 Value: $103.2K |
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|
Apr 06, 2026 Buy |
Torley Helen President And CEO |
10 000 Value: $120.7K |
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Apr 06, 2026 Sell |
Torley Helen President And CEO |
5 900 Value: $372.5K |
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Apr 06, 2026 Sell |
Torley Helen President And CEO |
4 100 Value: $262.5K |
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Apr 06, 2026 Buy |
Torley Helen President And CEO |
10 000 Value: $120.7K |
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Apr 02, 2026 Sell |
Torley Helen President And CEO |
4 200 Value: $272.5K |
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|
Apr 02, 2026 Sell |
Torley Helen President And CEO |
15 800 Value: $1.01M |
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Apr 02, 2026 Buy |
Torley Helen President And CEO |
20 000 Value: $241.4K |
||
|
Apr 02, 2026 Buy |
Torley Helen President And CEO |
20 000 Value: $241.4K |
||
|
Apr 01, 2026 Buy |
Ramsay David A Interim CFO |
10 000 Value: $654.0K |
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|
Apr 01, 2026 Buy |
Torley Helen President And CEO |
20 000 Value: $241.4K |
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
