Ultragenyx Pharmaceutical Inc. insider trading
RARE$14.50-0.72 (-4.73% today)
“Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise.”
Insider Trading vs Stock Price
Insider Trading vs Stock Price data
Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-52.0%). 0 insider transactions plotted in this window as 0 markers; nearby trades of the same kind are grouped.
| Date | Category | Person | Role | Action | Amount | Change in holding |
|---|
Open market purchase
Open market sellNet dollar flow · Buy / Sell balance
PremiumQ2 '25Q3 '25Q4 '25Q1 '26Q2 '26Q3 '26
Unlock quarterly net flowKey players
- EDEmil D. Kakkis2.9362%
- TRThomas Richard Kassberg0.2685%
- DKDennis Karl Huang0.15%
- JRJohn Richard Pinion0.135%
- EHErik Harris0.1201%
- ECEric Crombez0.1128%
- HHHoward Horn0.0977%
- KHKarah Herdman Parschauer0.0939%
- TATheodore Alan Huizenga0.0688%
- DGDaniel G. Welch0.041%
AI Activity Analysis
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Insider activity
Fromto
| Company | Insider / role | Action | ΔOwn | Avg price | Amount | ||
|---|---|---|---|---|---|---|---|
| RARE | Theodore Alan Huizenga | Open market sell$17.4K | -1.9% | $13.57 | $17.4K | Sep 15, 2026 | Sep 15, 2026 |
| RARE | Theodore Alan Huizenga | Open market sell$2.25K | -0.2% | $13.99 | $2.25K | Sep 3, 2026 | Sep 8, 2026 |
| RARE | Karah Herdman Parschauer | Open market sell$47.3K | -2.0% | $24.92 | $47.3K | Aug 3, 2026 | Aug 4, 2026 |
| RARE | Howard Horn | Open market sell$117K | -4.7% | $24.92 | $117K | Aug 3, 2026 | Aug 4, 2026 |
| RARE | Howard Horn | Open market sell$156K | -4.5% | $33.13 | $156K | Jul 1, 2026 | Jul 6, 2026 |
| RARE | Corazon (Corsee) D. Sanders | Open market sell$50.1K | -8.7% | $25.05 | $50.1K | Jun 15, 2026 | Jun 15, 2026 |
| RARE | Karah Herdman Parschauer | Open market sell$46.8K | -2.0% | $24.62 | $46.8K | Jun 15, 2026 | Jun 15, 2026 |
| RARE | Howard Horn | Open market sell$111K | -4.2% | $23.77 | $111K | Jun 1, 2026 | Jun 1, 2026 |
| RARE | Shehnaaz Suliman | Open market sell$144K | -17.0% | $25.12 | $144K | May 18, 2026 | May 18, 2026 |
| RARE | Eric Crombez | Open market sell$8.59K | -0.3% | $24.96 | $8.59K | May 5, 2026 | May 6, 2026 |
| RARE | Howard Horn | Open market sell$117K | -4.1% | $24.90 | $117K | May 1, 2026 | May 4, 2026 |
| RARE | Howard Horn | Open market sell$98.2K | -5.5% | $20.97 | $98.2K | Apr 1, 2026 | Apr 2, 2026 |
| RARE | Karah Herdman Parschauer | Open market sell$79.5K | -5.0% | $22.67 | $79.5K | Mar 10, 2026 | Mar 10, 2026 |
| RARE | Karah Herdman Parschauer | Open market sell$129K | -7.9% | $21.40 | $129K | Mar 6, 2026 | Mar 10, 2026 |
| RARE | Howard Horn | Open market sell$36.6K | -1.9% | $22.40 | $36.6K | Mar 3, 2026 | Mar 3, 2026 |
| RARE | John Richard Pinion | Open market sell$229K | -8.4% | $22.80 | $229K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Erik Harris | Open market sell$240K | -10.5% | $22.80 | $240K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Emil D. Kakkis | Open market sell$1.24M | -1.9% | $22.80 | $1.24M | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Karah Herdman Parschauer | Open market sell$185K | -9.6% | $22.80 | $185K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Theodore Alan Huizenga | Open market sell$37.2K | -3.2% | $22.80 | $37.2K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Howard Horn | Open market sell$70.3K | -3.5% | $22.54 | $70.3K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Howard Horn | Open market sell$121K | -5.6% | $22.80 | $121K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Eric Crombez | Open market sell$160K | -8.4% | $22.80 | $160K | Mar 2, 2026 | Mar 3, 2026 |
| RARE | Howard Horn | Open market sell$72.1K | -3.3% | $23.56 | $72.1K | Feb 2, 2026 | Feb 3, 2026 |
| RARE | Howard Horn | Open market sell$71.9K | -3.3% | $22.84 | $71.9K | Jan 2, 2026 | Jan 5, 2026 |
| RARE | Theodore Alan Huizenga | Open market sell$2.92K | -0.2% | $34.38 | $2.92K | Dec 29, 2025 | Dec 30, 2025 |
| RARE | Howard Horn | Open market sell$112K | -3.1% | $36.38 | $112K | Dec 10, 2025 | Dec 11, 2025 |
| RARE | Howard Horn | Open market sell$250K | -7.5% | $31.51 | $250K | Oct 13, 2025 | Oct 14, 2025 |