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Ultragenyx Pharmaceutical Stock Insider Power
Based on the 100 latest insides trades, we have calculated the insider power to be negative at -13.12. In total, the insiders bought 1.31M and sold 169.14K RARE 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
|
-13.12 |
| ● Buy | 1.31M shares |
| ● Sell | 169.14K shares |
|
65% Buy Activity
Negligible or No Correlation
|
|
Historical Insider Trades
| Date | Type | Person | Role | Amount |
|---|---|---|---|---|
|
Apr 16, 2026 Buy |
Pinion John Richard See Remarks |
23 116 Value: $566.8K |
||
|
Apr 16, 2026 Buy |
Kakkis Emil D President & CEO |
76 745 Value: $1.88M |
||
|
Apr 16, 2026 Buy |
Huang Dennis Karl See Remarks |
79 936 Value: $1.96M |
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|
Apr 16, 2026 Buy |
Kakkis Emil D President & CEO |
132 693 Value: $3.25M |
||
|
Apr 16, 2026 Buy |
Huang Dennis Karl See Remarks |
23 116 Value: $566.8K |
||
|
Apr 16, 2026 Buy |
Parschauer Karah Herdman EVP And Chief Legal Officer |
28 895 Value: $708.5K |
||
|
Apr 16, 2026 Buy |
Harris Erik EVP & Chief Commercial Officer |
28 895 Value: $708.5K |
||
|
Apr 16, 2026 Buy |
Crombez Eric EVP And Chief Medical Officer |
34 674 Value: $850.2K |
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|
Apr 16, 2026 Buy |
Horn Howard Chief Financial Officer |
34 674 Value: $850.2K |
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Apr 01, 2026 Sell |
Horn Howard Chief Financial Officer |
4 683 Value: $98.2K |
||
|
Mar 10, 2026 Sell |
Parschauer Karah Herdman EVP And Chief Legal Officer |
3 508 Value: $79.5K |
||
|
Mar 06, 2026 Sell |
Parschauer Karah Herdman EVP And Chief Legal Officer |
6 018 Value: $128.8K |
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|
Mar 03, 2026 Sell |
Horn Howard Chief Financial Officer |
1 635 Value: $36.6K |
||
|
Mar 02, 2026 Sell |
Crombez Eric EVP And Chief Medical Officer |
7 029 Value: $160.3K |
||
|
Mar 02, 2026 Sell |
Huizenga Theodore Alan SVP, Chief Accounting Officer |
1 632 Value: $37.2K |
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Mar 02, 2026 Sell |
Parschauer Karah Herdman EVP And Chief Legal Officer |
8 135 Value: $185.5K |
||
|
Mar 02, 2026 Sell |
Kakkis Emil D President & CEO |
54 404 Value: $1.24M |
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|
Mar 02, 2026 Sell |
Harris Erik EVP & Chief Commercial Officer |
10 539 Value: $240.3K |
||
|
Mar 02, 2026 Sell |
Pinion John Richard See Remarks |
10 029 Value: $228.7K |
||
|
Mar 02, 2026 Sell |
Huizenga Theodore Alan SVP, Chief Accounting Officer |
148 Value: $3K |
||
|
Mar 02, 2026 Sell |
Horn Howard Chief Financial Officer |
5 290 Value: $120.6K |
||
|
Mar 02, 2026 Sell |
Horn Howard Chief Financial Officer |
3 119 Value: $70.3K |
||
|
Mar 02, 2026 Sell |
Huang Dennis Karl See Remarks |
999 Value: $23.4K |
||
|
Mar 01, 2026 Buy |
Kakkis Emil D President & CEO |
71 177 Value: $1.60M |
||
|
Mar 01, 2026 Buy |
Harris Erik EVP & Chief Commercial Officer |
11 643 Value: $260.9K |
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
