Through the 90-day period concluding January 10, 2026, Ultragenyx Pharmaceutical's top three insider stakeholders include President & Ceo Emil D Kakkis (2.80Mn shares), Cbo & Evp Thomas Richard Kassberg (264.73K shares), Officer Dennis Karl Huang (114.59K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Emil D Kakkis | President & Ceo | 2,800,716 | 04 Mar, 2025 |
| Thomas Richard Kassberg | Cbo & Evp | 264,730 | 04 Mar, 2025 |
| Dennis Karl Huang | Nan | 114,591 | 04 Mar, 2025 |
| John Richard Pinion | Nan | 108,428 | 04 Mar, 2025 |
| Howard Horn | Chief Financial Officer | 91,996 | 05 Jan, 2026 |
| Erik Harris | Evp & Chief Commercial Officer | 87,855 | 04 Mar, 2025 |
| Karah Herdman Parschauer | Evp And Chief Legal Officer | 73,271 | 12 Sep, 2025 |
| Eric Crombez | Evp And Chief Medical Officer | 71,530 | 05 May, 2025 |
| William Aliski | 66,849 | 28 Jun, 2021 | |
| Mardi Dier | Cfo & Executive Vice President | 66,695 | 17 Oct, 2022 |
| Theodore Alan Huizenga | Svp And Chief Accounting Officer | 50,450 | 30 Dec, 2025 |
| Camille L Bedrosian | Evp And Chief Medical Officer | 46,720 | 03 Mar, 2023 |
| Daniel G Welch | 32,690 | 19 May, 2025 | |
| Michael Narachi | 32,690 | 19 May, 2025 | |
| Deborah Dunsire | 30,815 | 19 May, 2025 | |
| Matthew K Fust | 25,945 | 19 May, 2025 | |
| Shehnaaz Suliman | 25,940 | 19 May, 2025 | |
| Amrit Ray | 23,365 | 19 May, 2025 | |
| Lars Ekman | 17,745 | 28 Jun, 2022 | |
| Corazon (Corsee) D. Sanders | 15,344 | 23 Jun, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Howard Horn | Common Stock | D | 3,150 | $22.84 | 91,996 | D | S |
| 29 Dec, 2025 | Theodore Alan Huizenga | Common Stock | D | 85 | $34.38 | 50,450 | D | S |
| 29 Dec, 2025 | Theodore Alan Huizenga | - | - | 50,450 | D | |||
| 10 Dec, 2025 | Howard Horn | Common Stock | D | 3,081 | $36.38 | 95,146 | D | S |
| 13 Oct, 2025 | Howard Horn | Common Stock | D | 7,942 | $31.51 | 98,227 | D | S |
| 18 Sep, 2025 | Theodore Alan Huizenga | Common Stock | D | 64 | $29.17 | 50,242 | D | S |
| 12 Sep, 2025 | Karah Herdman Parschauer | - | - | 73,271 | D | |||
| 12 Sep, 2025 | Karah Herdman Parschauer | Common Stock | D | 2,450 | $31.17 | 73,271 | D | S |
| 05 Sep, 2025 | Theodore Alan Huizenga | Common Stock | D | 84 | $31.39 | 50,306 | D | S |
| 20 Jun, 2025 | Corazon (Corsee) D. Sanders | Common Stock | D | 2,405 | $37.39 | 15,344 | D | S |
| 15 May, 2025 | Daniel G Welch | Common Stock | A | 5,740 | $0.00 | 32,690 | D | A |
| 15 May, 2025 | Deborah Dunsire | Common Stock | A | 5,740 | $0.00 | 30,815 | D | A |
| 15 May, 2025 | Michael Narachi | Common Stock | A | 5,740 | $0.00 | 32,690 | D | A |
| 15 May, 2025 | Matthew K Fust | Common Stock | A | 5,740 | $0.00 | 25,945 | D | A |
| 15 May, 2025 | Shehnaaz Suliman | Common Stock | A | 5,740 | $0.00 | 25,940 | D | A |
| 15 May, 2025 | Corazon (Corsee) D. Sanders | Common Stock | A | 5,740 | $0.00 | 17,749 | D | A |
| 15 May, 2025 | Amrit Ray | - | - | 23,365 | D | |||
| 15 May, 2025 | Amrit Ray | Common Stock | A | 5,740 | $0.00 | 23,365 | D | A |
| 05 May, 2025 | Eric Crombez | Common Stock | D | 520 | $39.24 | 71,530 | D | S |
| 05 May, 2025 | Eric Crombez | - | - | 71,530 | D |