Theodore Alan Huizenga serves as Executive at Ultragenyx Pharmaceutical Inc., where they oversee executive responsibilities. Since joining the company, Theodore Alan Huizenga has executed 92 insider transactions totaling $3.2M, demonstrating a bearish approach to their equity position. Their most recent transaction on Dec 29, 2025 involved selling 85 shares valued at $2.9K.
Theodore Alan Huizenga currently holds 50,450 shares of Ultragenyx Pharmaceutical Inc. (RARE), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Theodore Alan Huizenga has been a net seller of RARE stock. They have purchased $0 and sold $3.2M worth of shares.
Theodore Alan Huizenga's most recent insider trade was on Dec 29, 2025, when they sold 85 shares at $34.38 per share.
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| $29.17 |
| Discretionary |
| Sep 5, 2025 | RARE | $2.6K | Sale | 84 | $31.39 | Discretionary |
| Sep 16, 2024 | RARE | $0 | Award | 700 | $N/A | Discretionary |
| Sep 3, 2024 | RARE | $5.1K | Sale | 91 | $56.19 | Discretionary |
| Apr 16, 2024 | RARE | $592 | Payment | 14 | $42.31 | Discretionary |
| Mar 1, 2024 | RARE | $18.3K | Sale | 341 | $53.76 | Discretionary |
| Mar 1, 2024 | RARE | $6.5K | Payment | 121 | $53.69 | Discretionary |
| Mar 1, 2024 | RARE | $0 | Award | 13,950 | $N/A | Discretionary |
| Jan 2, 2024 | RARE | $63.0K | Option Exercise | 3,000 | $21.00 | Discretionary |
| Dec 20, 2023 | RARE | $0 | Award | 1,000 | $N/A | Discretionary |
| Sep 7, 2023 | RARE | $6.2K | Sale | 163 | $38.34 | Discretionary |
| Sep 7, 2023 | RARE | $82.0K | Sale | 2,000 | $41.00 | Discretionary |
| Sep 7, 2023 | RARE | $42.0K | Option Exercise | 2,000 | $21.00 | Discretionary |
| Sep 1, 2023 | RARE | $32.7K | Sale | 883 | $37.04 | Discretionary |
| Sep 1, 2023 | RARE | $3.3K | Sale | 87 | $38.23 | Discretionary |
| May 9, 2023 | RARE | $63.0K | Option Exercise | 3,000 | $21.00 | Discretionary |
| Apr 16, 2023 | RARE | $535 | Payment | 14 | $38.20 | Discretionary |
| Apr 16, 2023 | RARE | $6.9K | Disposition | 181 | $38.20 | Discretionary |
| Mar 1, 2023 | RARE | $4.6K | Sale | 100 | $45.65 | Discretionary |
| Mar 1, 2023 | RARE | $60.9K | Disposition | 1,333 | $45.65 | Discretionary |
| Mar 1, 2023 | RARE | $0 | Award | 7,590 | $N/A | Discretionary |
| Feb 28, 2023 | RARE | $27.7K | Sale | 639 | $43.40 | Discretionary |
| Dec 21, 2022 | RARE | $89.3K | Sale | 2,031 | $43.96 | Discretionary |
| Sep 1, 2022 | RARE | $0 | Award | 1,000 | $N/A | Discretionary |
| Apr 16, 2022 | RARE | $11.2K | Sale | 132 | $84.55 | Discretionary |
| Mar 1, 2022 | RARE | $56.2K | Sale | 843 | $66.62 | Discretionary |
| Mar 1, 2022 | RARE | $0 | Award | 3,710 | $N/A | Discretionary |
| Oct 14, 2021 | RARE | $11.4K | Sale | 140 | $81.14 | Discretionary |
| Sep 13, 2021 | RARE | $0 | Gift | 819 | $N/A | Discretionary |