SEC Form 4 · Updated Daily
RARE
— ULTRAGENYX PHARMACEUTICAL INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| COULTER JAMES G | 10%+ Owner | 2,596,420 | 2014-07-14 | S |
| BONDERMAN DAVID | Reporting Owner | 2,596,420 | 2014-07-14 | S |
| TPG Group Holdings (SBS) Advisors, Inc. | Reporting Owner | 2,596,420 | 2014-07-14 | S |
| FMR LLC | Reporting Owner | 1,457,994 | 2014-08-01 | J |
| KAKKIS EMIL D | Director · Officer | 735,739 | 2026-04-16 | A |
| Kassberg Thomas Richard | Officer | 271,266 | 2025-03-01 | A |
| Huang Dennis Karl | Officer | 147,845 | 2026-04-16 | A |
| Pinion John Richard | Officer | 133,142 | 2026-04-16 | A |
| Harris Erik | Officer | 118,410 | 2026-04-16 | A |
| Crombez Eric | Officer | 111,189 | 2026-05-05 | S |
| Sharp Shalini | Director | 97,812 | 2020-10-14 | S |
| Parschauer Karah Herdman | Director | 92,562 | 2026-08-03 | S |
| Horn Howard | Officer | 89,229 | 2026-10-15 | S |
| Huizenga Theodore Alan | Officer | 67,863 | 2026-09-15 | S |
| Aliski William | Director | 66,849 | 2021-06-24 | A |
| Dier Mardi | Officer | 66,695 | 2022-10-14 | S |
| Bedrosian Camille L | Director | 50,601 | 2023-03-01 | A |
| NARACHI MICHAEL | Director | 40,441 | 2026-05-14 | A |
| WELCH DANIEL G | Director | 40,441 | 2026-05-14 | A |
| Dunsire Deborah | Director | 38,566 | 2026-05-14 | A |
| SIEGALL CLAY B | Director | 35,704 | 2020-08-07 | M |
| Fust Matthew K | Director | 33,696 | 2026-05-14 | A |
| SULIMAN SHEHNAAZ | Director | 33,691 | 2026-05-14 | A |
| Ray Amrit | Director | 31,116 | 2026-05-14 | A |
| Dallas Jayson Donald Alexander | Officer | 23,830 | 2018-06-01 | F |
| Sanders Corazon (Corsee) D. | Director | 21,095 | 2026-06-15 | S |
| Hogenhuis Wladimir | Officer | 18,703 | 2019-10-04 | F |
| Ekman Lars | Director | 17,745 | 2022-06-24 | A |
| AGARWAL SUNIL | Officer | 9,136 | 2016-08-19 | F |
| Nadav Eran | Director | 0 | 2014-01-30 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-15 | Horn Howard | Open-market sale | 7,066 | $15.27 | 89,229 |
| 2026-09-15 | Huizenga Theodore Alan | Open-market sale | 1,283 | $13.57 | 67,863 |
| 2026-09-03 | Huizenga Theodore Alan | Open-market sale | 161 | $13.99 | 69,146 |
| 2026-08-03 | Horn Howard | Open-market sale | 4,696 | $24.92 | 96,295 |
| 2026-08-03 | Parschauer Karah Herdman | Open-market sale | 1,900 | $24.92 | 92,562 |
| 2026-07-01 | Horn Howard | Open-market sale | 4,698 | $33.13 | 100,991 |
| 2026-06-15 | Parschauer Karah Herdman | Open-market sale | 1,899 | $24.62 | 94,462 |
| 2026-06-15 | Sanders Corazon (Corsee) D. | Open-market sale | 2,000 | $25.05 | 21,095 |
| 2026-06-01 | Horn Howard | Open-market sale | 4,653 | $23.77 | 105,689 |
| 2026-05-18 | SULIMAN SHEHNAAZ | Open-market sale | 5,740 | $25.12 | 27,951 |
| 2026-05-14 | Dunsire Deborah | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | Dunsire Deborah | Grant / award | 7,751 | $0.00 | 38,566 |
| 2026-05-14 | WELCH DANIEL G | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | WELCH DANIEL G | Grant / award | 7,751 | $0.00 | 40,441 |
| 2026-05-14 | NARACHI MICHAEL | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | NARACHI MICHAEL | Grant / award | 7,751 | $0.00 | 40,441 |
| 2026-05-14 | Sanders Corazon (Corsee) D. | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | Sanders Corazon (Corsee) D. | Grant / award | 7,751 | $0.00 | 23,095 |
| 2026-05-14 | Ray Amrit | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | Ray Amrit | Grant / award | 7,751 | $0.00 | 31,116 |
| 2026-05-14 | SULIMAN SHEHNAAZ | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | SULIMAN SHEHNAAZ | Grant / award | 7,751 | $0.00 | 33,691 |
| 2026-05-14 | Fust Matthew K | Grant / award (derivative) | 14,058 | $0.00 | 14,058 |
| 2026-05-14 | Fust Matthew K | Grant / award | 7,751 | $0.00 | 33,696 |
| 2026-05-05 | Crombez Eric | Open-market sale | 344 | $24.96 | 111,189 |
| 2026-05-01 | Horn Howard | Open-market sale | 4,683 | $24.90 | 110,342 |
| 2026-04-22 | Huizenga Theodore Alan | Grant / award (derivative) | 7,348 | $0.00 | 7,348 |
| 2026-04-22 | Huizenga Theodore Alan | Grant / award | 20,241 | $0.00 | 68,911 |
| 2026-04-16 | Horn Howard | Grant / award (derivative) | 59,952 | $0.00 | 59,952 |
| 2026-04-16 | Horn Howard | Grant / award | 34,674 | $0.00 | 115,025 |
| 2026-04-16 | Crombez Eric | Grant / award (derivative) | 59,952 | $0.00 | 59,952 |
| 2026-04-16 | Crombez Eric | Grant / award | 34,674 | $0.00 | 110,975 |
| 2026-04-16 | Harris Erik | Grant / award (derivative) | 49,960 | $0.00 | 49,960 |
| 2026-04-16 | Harris Erik | Grant / award | 28,895 | $0.00 | 118,410 |
| 2026-04-16 | Parschauer Karah Herdman | Grant / award (derivative) | 49,960 | $0.00 | 49,960 |
| 2026-04-16 | Parschauer Karah Herdman | Grant / award | 28,895 | $0.00 | 95,715 |
| 2026-04-16 | Pinion John Richard | Grant / award (derivative) | 79,936 | $0.00 | 79,936 |
| 2026-04-16 | Pinion John Richard | Grant / award | 23,116 | $0.00 | 133,142 |
| 2026-04-16 | Huang Dennis Karl | Grant / award (derivative) | 79,936 | $0.00 | 79,936 |
| 2026-04-16 | Huang Dennis Karl | Grant / award | 23,116 | $0.00 | 147,845 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.