15 insiders reported 65 Form 4 transactions for Ultragenyx Pharmaceutical Inc. (RARE) over the past 18 months (most recent 2026-09-15). Recent activity: Huizenga Theodore Alan (SVP, Chief Accounting Officer) Sell 1,283 shares, Huizenga Theodore Alan (SVP, Chief Accounting Officer) Sell 161 shares, Parschauer Karah Herdman (EVP and Chief Legal Officer) Sell 1,900 shares, Horn Howard (Chief Financial Officer) Sell 4,696 shares, Horn Howard (Chief Financial Officer) Sell 4,698 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-15 | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sell | 1,283 | $17,410 |
| 2026-09-08 | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Sell | 161 | $2,252 |
| 2026-08-04 | Parschauer Karah Herdman | EVP and Chief Legal Officer | Sell | 1,900 | $47,348 |
| 2026-08-04 | Horn Howard | Chief Financial Officer | Sell | 4,696 | $117,024 |
| 2026-07-06 | Horn Howard | Chief Financial Officer | Sell | 4,698 | $155,645 |
| 2026-06-15 | Parschauer Karah Herdman | EVP and Chief Legal Officer | Sell | 1,899 | $46,753 |
| 2026-06-15 | Sanders Corazon (Corsee) D. | Director | Sell | 2,000 | $50,100 |
| 2026-06-01 | Horn Howard | Chief Financial Officer | Sell | 4,653 | $110,602 |
| 2026-05-18 | SULIMAN SHEHNAAZ | Director | Sell | 5,740 | $144,189 |
| 2026-05-18 | WELCH DANIEL G | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Dunsire Deborah | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Ray Amrit | Director | Buy | 7,751 | $0 |
| 2026-05-18 | SULIMAN SHEHNAAZ | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Fust Matthew K | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Sanders Corazon (Corsee) D. | Director | Buy | 7,751 | $0 |
| 2026-05-18 | NARACHI MICHAEL | Director | Buy | 7,751 | $0 |
| 2026-05-06 | Crombez Eric | EVP and Chief Medical Officer | Sell | 344 | $8,586 |
| 2026-05-04 | Horn Howard | Chief Financial Officer | Sell | 4,683 | $116,607 |
| 2026-04-24 | Huizenga Theodore Alan | SVP, Chief Accounting Officer | Buy | 20,241 | $0 |
| 2026-04-20 | Pinion John Richard | EVP, Chief Quality Operations Officer | Buy | 23,116 | $0 |
| 2026-04-20 | Horn Howard | Chief Financial Officer | Buy | 34,674 | $0 |
| 2026-04-20 | Crombez Eric | EVP and Chief Medical Officer | Buy | 34,674 | $0 |
| 2026-04-20 | Huang Dennis Karl | EVP, Chief Technical Operations Officer | Buy | 23,116 | $0 |
| 2026-04-20 | Parschauer Karah Herdman | EVP and Chief Legal Officer | Buy | 28,895 | $0 |
| 2026-04-20 | Harris Erik | EVP & Chief Commercial Officer | Buy | 28,895 | $0 |
Source: SEC Form 4 filings · as of 2026-09-15