16 insiders reported 93 Form 4 transactions for Ultragenyx Pharmaceutical Inc. (RARE) over the past 18 months (most recent 2026-08-04). Recent activity: 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, Parschauer Karah Herdman (EVP and Chief Legal Officer) Sell 1,899 shares, Sanders Corazon (Corsee) D. (Director) Sell 2,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 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 | Ray Amrit | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Dunsire Deborah | Director | Buy | 7,751 | $0 |
| 2026-05-18 | NARACHI MICHAEL | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Fust Matthew K | Director | Buy | 7,751 | $0 |
| 2026-05-18 | SULIMAN SHEHNAAZ | Director | Buy | 7,751 | $0 |
| 2026-05-18 | Sanders Corazon (Corsee) D. | Director | Buy | 7,751 | $0 |
| 2026-05-18 | WELCH DANIEL G | Director | Buy | 7,751 | $0 |
| 2026-05-18 | SULIMAN SHEHNAAZ | Director | Sell | 5,740 | $144,189 |
| 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 | KAKKIS EMIL D | President & CEO | Buy | 76,745 | $0 |
| 2026-04-20 | Huang Dennis Karl | See Remarks | Buy | 23,116 | $0 |
| 2026-04-20 | Pinion John Richard | See Remarks | Buy | 23,116 | $0 |
| 2026-04-20 | Crombez Eric | EVP and Chief Medical Officer | Buy | 34,674 | $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 |
| 2026-04-20 | Horn Howard | Chief Financial Officer | Buy | 34,674 | $0 |
| 2026-04-02 | Horn Howard | Chief Financial Officer | Sell | 4,683 | $98,203 |
Source: SEC Form 4 filings · as of 2026-08-04