Theodore Alan Huizenga

Companies

• Ultragenyx Pharmaceutical Inc.Controller and PAO Mar 28, 2014 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• UPUltragenyx Pharmaceutical Inc. RARE67,863 shares²$1.0M at $14.96Sep 15, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Sep 15, 2026Sold 1,283 shares at $13.57 of Ultragenyx Pharmaceutical Inc.²
• Sep 3, 2026Sold 161 shares at $13.99 of Ultragenyx Pharmaceutical Inc.³
• Apr 22, 2026Granted 20,241 shares of Ultragenyx Pharmaceutical Inc.⁴
• Mar 2, 2026Sold 1,632 shares at $22.80 of Ultragenyx Pharmaceutical Inc.⁵
• Mar 2, 2026Shares withheld for tax 148 shares at $23.39 of Ultragenyx Pharmaceutical Inc.⁵
• Dec 29, 2025Sold 85 shares at $34.38 of Ultragenyx Pharmaceutical Inc.⁶
• Sep 18, 2025Sold 64 shares at $29.17 of Ultragenyx Pharmaceutical Inc.⁷
• Sep 5, 2025Sold 84 shares at $31.39 of Ultragenyx Pharmaceutical Inc.⁸
• Mar 3, 2025Shares withheld for tax 141 shares at $42.92 of Ultragenyx Pharmaceutical Inc.⁹
• Mar 3, 2025Sold 967 shares at $42.10 of Ultragenyx Pharmaceutical Inc.⁹
• Mar 1, 2025Granted 9,392 shares of Ultragenyx Pharmaceutical Inc.⁹
• Dec 10, 2024Gift 648 shares of Ultragenyx Pharmaceutical Inc.¹⁰
• Sep 16, 2024Granted 700 shares of Ultragenyx Pharmaceutical Inc.¹¹
• Sep 3, 2024Sold 91 shares at $56.19 of Ultragenyx Pharmaceutical Inc.¹²
• Apr 16, 2024Shares withheld for tax 14 shares at $42.31 of Ultragenyx Pharmaceutical Inc.¹³
• Mar 1, 2024Sold 341 shares at $53.76 of Ultragenyx Pharmaceutical Inc.¹⁴
• Mar 1, 2024Shares withheld for tax 121 shares at $53.69 of Ultragenyx Pharmaceutical Inc.¹⁴
• Mar 1, 2024Granted 13,950 shares of Ultragenyx Pharmaceutical Inc.¹⁴
• Jan 2, 2024Exercised options 3,000 shares at $21.00 of Ultragenyx Pharmaceutical Inc.¹⁵
• Dec 20, 2023Granted 1,000 shares of Ultragenyx Pharmaceutical Inc.¹⁵
• Sep 7, 2023Sold 163 shares at $38.34 of Ultragenyx Pharmaceutical Inc.¹⁶
• Sep 7, 2023Sold 2,000 shares at $41.00 of Ultragenyx Pharmaceutical Inc.¹⁶
• Sep 7, 2023Exercised options 2,000 shares at $21.00 of Ultragenyx Pharmaceutical Inc.¹⁶
• Sep 1, 2023Sold 87 shares at $38.23 of Ultragenyx Pharmaceutical Inc.¹⁷
• Sep 1, 2023Sold 883 shares at $37.04 of Ultragenyx Pharmaceutical Inc.¹⁷