| Aug 19, 2025 | ANDY SASSINE | CHIEF FINANCIAL OFFICER | -1.24K | $16.56 | -$20.50K | p | -0.56% | 221.76K | Aug 15 | View |
| Oct 16, 2024 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -12.00K | $20.76 | -$249.12K | SELL | -2.68% | 435.33K | Oct 15 | View |
| Jun 14, 2024 | ANDY SASSINE | CHIEF FINANCIAL OFFICER | -50.00K | $32.03 | -$1.60M | SELL | -18.48% | 220.53K | Jun 12 | View |
| Jun 07, 2024 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -114.00 | $45.00 | -$5.13K | SELL | -0.03% | 447.33K | Jun 05 | View |
| Jun 04, 2024 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -26.00K | $40.01 | -$1.04M | SELL | -5.49% | 447.45K | Jun 03 | View |
| Mar 27, 2024 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -17.43K | $35.02 | -$610.57K | SELL | -3.55% | 473.45K | Mar 25 | View |
| Mar 21, 2024 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -8.56K | $35.01 | -$299.84K | SELL | -1.71% | 490.88K | Mar 19 | View |
| Nov 03, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $18.72 | -$93.60K | SELL | -0.99% | 499.45K | Nov 01 | View |
| Oct 04, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $25.61 | -$128.06K | SELL | -0.98% | 504.45K | Oct 02 | View |
| Sep 05, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $31.45 | -$157.26K | SELL | -0.97% | 509.45K | Sep 01 | View |
| Aug 03, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $34.91 | -$174.55K | SELL | -0.96% | 514.45K | Aug 01 | View |
| Jul 18, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -25.00K | $35.01 | -$875.25K | SELL | -4.59% | 519.45K | Jul 14 | View |
| Jul 18, 2023 | Keith Kummerfeld | SEE REMARKS | 0.00 | $21.98 | -$181.47K | SELL-OPTIONS | 0.00% | 950.00 | Jul 14 | View |
| Jul 07, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $28.75 | -$143.75K | SELL | -0.91% | 544.45K | Jul 03 | View |
| Jun 05, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $27.16 | -$135.80K | SELL | -0.90% | 549.45K | Jun 01 | View |
| May 12, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -25.00K | $30.08 | -$751.90K | SELL | -4.31% | 554.45K | May 10 - May 11 | View |
| May 03, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $25.93 | -$129.65K | SELL | -0.86% | 579.45K | May 01 | View |
| Apr 19, 2023 | Keith Kummerfeld | SEE REMARKS | 0.00 | $18.57 | -$133.95K | SELL-OPTIONS | 0.00% | 950.00 | Apr 18 | View |
| Apr 05, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $25.38 | -$126.90K | SELL | -0.85% | 584.45K | Apr 03 | View |
| Mar 08, 2023 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -5.00K | $16.07 | -$80.35K | SELL | -0.84% | 589.45K | Mar 06 | View |
| Dec 19, 2022 | Magda Marquet | DIRECTOR | 2.22K | $18.00 | $40.00K | BUY | 9.78% | 24.94K | Dec 15 | View |
| Nov 28, 2022 | Joseph Payne | PRESIDENT AND CEO | 5.00K | $16.51 | $82.55K | BUY | 0.34% | 1.48M | Nov 23 | View |
| Jan 06, 2022 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -8.10K | $40.00 | -$324.00K | SELL | -1.34% | 594.45K | Jan 04 | View |
| Dec 20, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -3.63K | $40.00 | -$145.33K | SELL | -0.60% | 602.55K | Dec 16 | View |
| Dec 10, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -6.37K | $40.00 | -$254.68K | SELL | -1.04% | 606.18K | Dec 08 | View |
| Nov 03, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $44.41 | -$444.10K | SELL | -1.61% | 612.55K | Nov 01 | View |
| Oct 04, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $44.36 | -$443.60K | SELL | -1.58% | 622.55K | Oct 01 | View |
| Sep 02, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $55.86 | -$558.60K | SELL | -1.56% | 632.55K | Sep 01 | View |
| Aug 12, 2021 | Ultragenyx Pharmaceutical Inc | DIRECTOR | -800.00K | $54.54 | -$43.63M | SELL | -36.36% | 1.40M | Aug 10 - Aug 11 | View |
| Aug 05, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $40.07 | -$400.70K | SELL | -1.53% | 642.55K | Aug 03 | View |
| Apr 05, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $42.95 | -$429.50K | SELL | -1.51% | 652.55K | Apr 01 | View |
| Mar 03, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $54.23 | -$542.30K | SELL | -1.49% | 662.55K | Mar 01 | View |
| Feb 03, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $75.31 | -$753.10K | SELL | -1.47% | 672.55K | Feb 01 | View |
| Jan 05, 2021 | Pad Chivukula | CHIEF SCIENTIFIC OFFICER & COO | -10.00K | $46.40 | -$464.00K | SELL | -1.44% | 682.55K | Jan 04 | View |
| Dec 10, 2020 | Ultragenyx Pharmaceutical Inc | — | -800.00K | $100.81 | -$80.65M | SELL | -26.67% | 2.20M | Dec 08 - Dec 09 | View |
| Dec 03, 2020 | Pad Chivukula | — | -10.00K | $96.19 | -$961.90K | SELL | -1.42% | 692.55K | Dec 01 | View |
| Nov 03, 2020 | Pad Chivukula | — | -10.00K | $55.28 | -$552.80K | SELL | -1.40% | 702.55K | Nov 02 | View |
| Oct 02, 2020 | Pad Chivukula | — | -10.00K | $42.83 | -$428.30K | SELL | -1.38% | 712.55K | Oct 01 | View |
| Sep 04, 2020 | Pad Chivukula | — | -10.00K | $45.16 | -$451.60K | SELL | -1.37% | 722.55K | Sep 03 | View |
| Jun 12, 2020 | Keith Kummerfeld | — | 450.00 | $33.33 | $15.00K | PURCHASE | 90.00% | 950.00 | Jun 12 | View |
| Jun 10, 2020 | Joseph Payne | — | 1.00K | $31.69 | $31.69K | PURCHASE | 0.07% | 1.48M | Jun 10 | View |
| Jun 10, 2020 | ANDY SASSINE | — | 5.00K | $29.74 | $148.70K | PURCHASE | 1.86% | 273.25K | Jun 10 | View |
| Dec 09, 2019 | ANDY SASSINE | CHIEF FINANCIAL OFFICER | 5.65K | $9.73 | $54.96K | BUY | 2.15% | 268.25K | Dec 05 | View |
| Dec 05, 2019 | ANDY SASSINE | CHIEF FINANCIAL OFFICER | 10.00K | $10.00 | $100.00K | BUY | 4.04% | 257.60K | Dec 03 | View |
| Sep 17, 2019 | Magda Marquet | DIRECTOR | 2.30K | $10.58 | $24.33K | BUY | 11.26% | 22.72K | Sep 13 | View |
| Sep 12, 2019 | Keith Kummerfeld | SEE REMARKS | 500.00 | $10.69 | $5.35K | BUY | ∞ | 500.00 | Sep 12 | View |
| Aug 30, 2019 | Joseph Payne | PRESIDENT AND CEO | 5.00K | $11.22 | $56.10K | BUY | 0.34% | 1.47M | Aug 29 | View |
| Aug 26, 2019 | ANDY SASSINE | CHIEF FINANCIAL OFFICER | 10.00K | $10.90 | $109.00K | BUY | 4.21% | 247.60K | Aug 23 | View |
| Aug 21, 2019 | PETER FARRELL | DIRECTOR | 9.11K | $10.94 | $99.67K | BUY | 10.54% | 95.56K | Aug 19 - Aug 20 | View |