Ultragenyx (RARE)
Insider transactions
A complete record of Form 4 filings tracking every share acquisition and disposal by executives, directors, and senior officers. Filterable by date range and transaction type, the table exposes the direct market actions of those with the deepest knowledge of a company's operations — providing a factual, data-driven signal of internal conviction that complements traditional fundamental and technical analysis.
Transaction date | Executive | Executive Title | Security Type | Acquisition / Disposal | Shares | Share price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 7,066 | $15.27 |
| Sep 15, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Disposal | 1,283 | $13.57 |
| Sep 3, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Disposal | 161 | $13.99 |
| Aug 3, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 4,696 | $24.92 |
| Aug 3, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Disposal | 1,900 | $24.92 |
| Jul 1, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 4,698 | $33.13 |
| Jun 15, 2026 | SANDERS, CORAZON (CORSEE) D. | Director | Common Stock | Disposal | 2,000 | $25.05 |
| Jun 15, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Disposal | 1,899 | $24.62 |
| Jun 1, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 4,653 | $23.77 |
| May 18, 2026 | SULIMAN, SHEHNAAZ | Director | Common Stock | Disposal | 5,740 | $25.12 |
| May 14, 2026 | NARACHI, MICHAEL | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | FUST, MATTHEW K | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | NARACHI, MICHAEL | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | WELCH, DANIEL G | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | RAY, AMRIT | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | DUNSIRE, DEBORAH | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | WELCH, DANIEL G | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | DUNSIRE, DEBORAH | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | RAY, AMRIT | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | FUST, MATTHEW K | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | SANDERS, CORAZON (CORSEE) D. | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 14, 2026 | SANDERS, CORAZON (CORSEE) D. | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | SULIMAN, SHEHNAAZ | Director | Common Stock | Acquisition | 7,751 | $0 |
| May 14, 2026 | SULIMAN, SHEHNAAZ | Director | Stock Option (Right to Buy) | Acquisition | 14,058 | $0 |
| May 5, 2026 | CROMBEZ, ERIC | EVP and Chief Medical Officer | Common Stock | Disposal | 344 | $24.96 |
| May 1, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 4,683 | $24.90 |
| Apr 22, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Acquisition | 20,241 | $0 |
| Apr 22, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Stock Option (Right to Buy) | Acquisition | 7,348 | $0 |
| Apr 16, 2026 | HUANG, DENNIS KARL | See Remarks | Stock Option (Right to Buy) | Acquisition | 79,936 | $0 |
| Apr 16, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Stock Option (Right to Buy) | Acquisition | 49,960 | $0 |
| Apr 16, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Acquisition | 28,895 | $0 |
| Apr 16, 2026 | KAKKIS, EMIL D | Director, President & CEO | Common Stock | Acquisition | 76,745 | $0 |
| Apr 16, 2026 | HORN, HOWARD | Chief Financial Officer | Stock Option (Right to Buy) | Acquisition | 59,952 | $0 |
| Apr 16, 2026 | CROMBEZ, ERIC | EVP and Chief Medical Officer | Common Stock | Acquisition | 34,674 | $0 |
| Apr 16, 2026 | PINION, JOHN RICHARD | See Remarks | Stock Option (Right to Buy) | Acquisition | 79,936 | $0 |
| Apr 16, 2026 | CROMBEZ, ERIC | EVP and Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 59,952 | $0 |
| Apr 16, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Acquisition | 34,674 | $0 |
| Apr 16, 2026 | KAKKIS, EMIL D | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 132,693 | $0 |
| Apr 16, 2026 | PINION, JOHN RICHARD | See Remarks | Common Stock | Acquisition | 23,116 | $0 |
| Apr 16, 2026 | HARRIS, ERIK | EVP & Chief Commercial Officer | Stock Option (Right to Buy) | Acquisition | 49,960 | $0 |
| Apr 16, 2026 | HUANG, DENNIS KARL | See Remarks | Common Stock | Acquisition | 23,116 | $0 |
| Apr 16, 2026 | HARRIS, ERIK | EVP & Chief Commercial Officer | Common Stock | Acquisition | 28,895 | $0 |
| Apr 1, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 4,683 | $20.97 |
| Mar 10, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Disposal | 3,508 | $22.67 |
| Mar 6, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Disposal | 6,018 | $21.40 |
| Mar 3, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 1,635 | $22.40 |
| Mar 2, 2026 | PINION, JOHN RICHARD | See Remarks | Common Stock | Disposal | 10,029 | $22.80 |
| Mar 2, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Disposal | 1,632 | $22.80 |
| Mar 2, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 3,119 | $22.54 |
| Mar 2, 2026 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Disposal | 148 | $23.39 |
| Mar 2, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 5,290 | $22.80 |
| Mar 2, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Disposal | 8,135 | $22.80 |
| Mar 2, 2026 | CROMBEZ, ERIC | EVP and Chief Medical Officer | Common Stock | Disposal | 7,029 | $22.80 |
| Mar 2, 2026 | HARRIS, ERIK | EVP & Chief Commercial Officer | Common Stock | Disposal | 10,539 | $22.80 |
| Mar 2, 2026 | KAKKIS, EMIL D | Director, President & CEO | Common Stock | Disposal | 54,404 | $22.80 |
| Mar 2, 2026 | HUANG, DENNIS KARL | See Remarks | Common Stock | Disposal | 999 | $23.39 |
| Mar 1, 2026 | HUANG, DENNIS KARL | See Remarks | Common Stock | Acquisition | 11,137 | $0 |
| Mar 1, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Acquisition | 6,143 | $0 |
| Mar 1, 2026 | PARSCHAUER, KARAH HERDMAN | EVP and Chief Legal Officer | Common Stock | Acquisition | 11,137 | $0 |
| Mar 1, 2026 | CROMBEZ, ERIC | EVP and Chief Medical Officer | Common Stock | Acquisition | 11,643 | $0 |
| Mar 1, 2026 | HARRIS, ERIK | EVP & Chief Commercial Officer | Common Stock | Acquisition | 11,643 | $0 |
| Mar 1, 2026 | KAKKIS, EMIL D | Director, President & CEO | Common Stock | Acquisition | 71,177 | $0 |
| Mar 1, 2026 | PINION, JOHN RICHARD | See Remarks | Common Stock | Acquisition | 11,137 | $0 |
| Feb 2, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 3,061 | $23.56 |
| Jan 2, 2026 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 3,150 | $22.84 |
| Dec 29, 2025 | HUIZENGA, THEODORE ALAN | SVP, Chief Accounting Officer | Common Stock | Disposal | 85 | $34.38 |
| Dec 10, 2025 | HORN, HOWARD | Chief Financial Officer | Common Stock | Disposal | 3,081 | $36.38 |