Ultragenyx Pharmaceutical Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sale | 85 | $34.38 | $2,922 | 50,450 | Dec 29, 2025 |
| Horn Howard | Chief Financial Officer | Sale | 3,081 | $36.38 | $112,087 | 95,146 | Dec 10, 2025 |
| Horn Howard | Chief Financial Officer | Sale | 7,942 | $31.51 | $250,252 | 98,227 | Oct 13, 2025 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sale | 64 | $29.17 | $1,867 | 50,242 | Sep 18, 2025 |
| Parschauer Karah Herdman | EVP and Chief Legal Officer | Sale | 2,450 | $31.17 | $76,367 | 73,271 | Sep 12, 2025 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sale | 84 | $31.39 | $2,637 | 50,306 | Sep 5, 2025 |
| Sanders Corazon (Corsee) D. | — | Sale | 2,405 | $37.39 | $89,923 | 15,344 | Jun 20, 2025 |
| SULIMAN SHEHNAAZ | — | Award / Grant | 5,740 | — | — | 25,940 | May 15, 2025 |
| WELCH DANIEL G | — | Award / Grant | 5,740 | — | — | 32,690 | May 15, 2025 |
| Sanders Corazon (Corsee) D. | — | Award / Grant | 5,740 | — | — | 17,749 | May 15, 2025 |
| NARACHI MICHAEL | — | Award / Grant | 5,740 | — | — | 32,690 | May 15, 2025 |
| Fust Matthew K | — | Award / Grant | 5,740 | — | — | 25,945 | May 15, 2025 |
| Dunsire Deborah | — | Award / Grant | 5,740 | — | — | 30,815 | May 15, 2025 |
| Ray Amrit | — | Award / Grant | 5,740 | — | — | 23,365 | May 15, 2025 |
| Crombez Eric | EVP and Chief Medical Officer | Sale | 242 | $35.11 | $8,497 | 71,680 | May 5, 2025 |
| Horn Howard | Chief Financial Officer | Sale | 1,785 | $40.40 | $72,114 | 106,169 | Mar 6, 2025 |
| Kassberg Thomas Richard | CBO & EVP | Sale | 6,028 | $42.10 | $253,779 | 265,238 | Mar 3, 2025 |
| Parschauer Karah Herdman | EVP and Chief Legal Officer | Award / Grant | 18,443 | — | — | 88,133 | Mar 3, 2025 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Award / Grant | 9,392 | — | — | 51,232 | Mar 3, 2025 |
| Crombez Eric | EVP and Chief Medical Officer | Sale | 8,945 | $42.10 | $376,585 | 71,922 | Mar 1, 2025 |
| Pinion John Richard | See Remarks | Tax Withholding | 31 | $42.92 | $1,331 | 108,428 | Mar 1, 2025 |
| Harris Erik | EVP & Chief Commercial Officer | Sale | 15,103 | $42.10 | $635,836 | 87,855 | Mar 1, 2025 |
| Huang Dennis Karl | See Remarks | Tax Withholding | 1,348 | $42.92 | $57,856 | 114,591 | Mar 1, 2025 |
| Horn Howard | Chief Financial Officer | Award / Grant | 15,653 | — | — | 107,954 | Mar 1, 2025 |
| KAKKIS EMIL D | President & CEO | Sale | 73,434 | $42.10 | $3,091,571 | 641,731 | Feb 28, 2025 |
| Parschauer Karah Herdman | EVP and Chief Legal Officer | Award / Grant | 14,494 | — | — | 69,690 | Feb 27, 2025 |
| KAKKIS EMIL D | President & CEO | Sale | 11,727 | $42.23 | $495,231 | 2,183,985 | Dec 30, 2024 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Gift | 648 | — | — | 41,840 | Dec 10, 2024 |
| KAKKIS EMIL D | President & CEO | Sale | 8,273 | $50.00 | $413,650 | 2,195,712 | Dec 9, 2024 |
| Horn Howard | Chief Financial Officer | Sale | 7,465 | $52.76 | $393,853 | 92,301 | Oct 10, 2024 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Award / Grant | 700 | — | — | 42,251 | Sep 16, 2024 |
| KAKKIS EMIL D | President & CEO | Sale | 20,000 | $55.85 | $1,117,000 | 2,223,985 | Sep 3, 2024 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sale | 91 | $56.19 | $5,113 | 41,551 | Sep 3, 2024 |
| KAKKIS EMIL D | President & CEO | Sale | 20,000 | $50.17 | $1,003,400 | 2,243,985 | Aug 6, 2024 |
| Sanders Corazon (Corsee) D. | — | Sale | 584 | $40.98 | $23,932 | 12,009 | Jul 2, 2024 |
| Dunsire Deborah | — | Award / Grant | 5,345 | — | — | 25,075 | Jun 18, 2024 |
| Fust Matthew K | — | Award / Grant | 5,345 | — | — | 20,205 | Jun 18, 2024 |
| WELCH DANIEL G | — | Award / Grant | 5,345 | — | — | 26,950 | Jun 18, 2024 |
| NARACHI MICHAEL | — | Award / Grant | 5,345 | — | — | 26,950 | Jun 18, 2024 |
| Ray Amrit | — | Award / Grant | 5,345 | — | — | 17,625 | Jun 18, 2024 |
| Sanders Corazon (Corsee) D. | — | Award / Grant | 5,345 | — | — | 12,593 | Jun 18, 2024 |
| SULIMAN SHEHNAAZ | — | Award / Grant | 5,345 | — | — | 20,200 | Jun 18, 2024 |
| Parschauer Karah Herdman | EVP and Chief Legal Officer | Sale | 9,806 | $45.00 | $441,270 | 57,981 | Jun 12, 2024 |
| Sanders Corazon (Corsee) D. | — | Sale | 1,737 | $41.10 | $71,391 | 7,248 | Jun 10, 2024 |
| Crombez Eric | EVP and Chief Medical Officer | Sale | 354 | $43.66 | $15,456 | 48,431 | May 2, 2024 |
| Crombez Eric | EVP and Chief Medical Officer | Sale | 142 | $44.10 | $6,262 | 48,785 | Apr 18, 2024 |
| Huizenga Theodore Alan | SVP, Chief Accounting Officer | Tax Withholding | 14 | $42.31 | $592 | 41,366 | Apr 16, 2024 |
| Kassberg Thomas Richard | CBO & EVP | Sale | 11,509 | $49.93 | $574,644 | 252,823 | Mar 11, 2024 |
| Fust Matthew K | — | Sale | 7,500 | $50.88 | $381,600 | 14,860 | Mar 7, 2024 |
| Horn Howard | Chief Financial Officer | Award / Grant | 19,400 | — | — | 99,766 | Mar 1, 2024 |