Follow the people · Insider
Theodore Alan Huizenga
Theodore Alan Huizenga files insider transactions with the SEC as a svp, chief accounting officer of Ultragenyx Pharmaceutical (RARE). We hold 2 disclosed purchases and sales filed since 5 March 2015, 1 of them in the last 90 days.
- Files forRARE
- Disclosed buys and sells2 in all, 1 in the last 90 days
- Last disclosure8 September 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 3 March 2015 — 3 September 2026SVP, Chief Accounting Officer · Ultragenyx Pharmaceutical (RARE)133 Form 4 lines · source: SEC Form 4
Everything they disclosed
120 entries, newest first — one per disclosure report, one per Form 4 line- ▼ sold on the open market 161 shares of Ultragenyx PharmaceuticalSEC Form 48 September 2026Common Stock · traded 3 September 2026 · filed 8 September 2026
- was granted 20,241 shares of Ultragenyx PharmaceuticalSEC Form 424 April 2026Common Stock · traded 22 April 2026 · filed 24 April 2026
- was granted 7,348 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 424 April 2026Stock Option (Right to Buy) · traded 22 April 2026 · filed 24 April 2026
- had shares withheld for tax on 148 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 1,632 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- had shares withheld for tax on 148 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 1,632 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2026Common Stock · traded 2 March 2026 · filed 3 March 2026
- ▼ sold on the open market 85 shares of Ultragenyx PharmaceuticalSEC Form 430 December 2025Common Stock · traded 29 December 2025 · filed 30 December 2025
- ▼ sold on the open market 64 shares of Ultragenyx PharmaceuticalSEC Form 419 September 2025Common Stock · traded 18 September 2025 · filed 19 September 2025
- ▼ sold on the open market 84 shares of Ultragenyx PharmaceuticalSEC Form 48 September 2025Common Stock · traded 5 September 2025 · filed 8 September 2025
- was granted 5,632 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 44 March 2025Stock Option (Right to Buy) · traded 1 March 2025 · filed 4 March 2025
- was granted 9,392 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2025Common Stock · traded 1 March 2025 · filed 4 March 2025
- ▼ sold on the open market 967 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2025Common Stock · traded 3 March 2025 · filed 4 March 2025
- had shares withheld for tax on 141 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2025Common Stock · traded 3 March 2025 · filed 4 March 2025
- gave away 648 shares of Ultragenyx PharmaceuticalSEC Form 411 December 2024Common Stock · traded 10 December 2024 · filed 11 December 2024
- was granted 700 shares of Ultragenyx PharmaceuticalSEC Form 418 September 2024Common Stock · traded 16 September 2024 · filed 18 September 2024
- ▼ sold on the open market 91 shares of Ultragenyx PharmaceuticalSEC Form 45 September 2024Common Stock · traded 3 September 2024 · filed 5 September 2024
- had shares withheld for tax on 14 shares of Ultragenyx PharmaceuticalSEC Form 418 April 2024Common Stock · traded 16 April 2024 · filed 18 April 2024
- was granted 8,200 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 45 March 2024Stock Option (Right to Buy) · traded 1 March 2024 · filed 5 March 2024
- was granted 2,351 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 45 March 2024Stock Option (Right to Buy) · traded 1 March 2024 · filed 5 March 2024
- was granted 13,950 shares of Ultragenyx PharmaceuticalSEC Form 45 March 2024Common Stock · traded 1 March 2024 · filed 5 March 2024
- had shares withheld for tax on 121 shares of Ultragenyx PharmaceuticalSEC Form 45 March 2024Common Stock · traded 1 March 2024 · filed 5 March 2024
- ▼ sold on the open market 341 shares of Ultragenyx PharmaceuticalSEC Form 45 March 2024Common Stock · traded 1 March 2024 · filed 5 March 2024
- exercised options over 3,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 42 January 2024Stock Option (Right to Buy) · traded 2 January 2024 · filed 2 January 2024
- was granted 1,000 shares of Ultragenyx PharmaceuticalSEC Form 42 January 2024Common Stock · traded 20 December 2023 · filed 2 January 2024
- exercised options over 3,000 shares of Ultragenyx PharmaceuticalSEC Form 42 January 2024Common Stock · traded 2 January 2024 · filed 2 January 2024
- was granted 2,351 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 429 September 2023Stock Option (Right to Buy) · traded 27 September 2023 · filed 29 September 2023
- exercised options over 2,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 411 September 2023Stock Option (Right to Buy) · traded 7 September 2023 · filed 11 September 2023
- exercised options over 2,000 shares of Ultragenyx PharmaceuticalSEC Form 411 September 2023Common Stock · traded 7 September 2023 · filed 11 September 2023
- ▼ sold on the open market 2,000 shares of Ultragenyx PharmaceuticalSEC Form 411 September 2023Common Stock · traded 7 September 2023 · filed 11 September 2023
- ▼ sold on the open market 163 shares of Ultragenyx PharmaceuticalSEC Form 411 September 2023Common Stock · traded 7 September 2023 · filed 11 September 2023
- ▼ sold on the open market 883 shares of Ultragenyx PharmaceuticalSEC Form 46 September 2023Common Stock · traded 1 September 2023 · filed 6 September 2023
- ▼ sold on the open market 87 shares of Ultragenyx PharmaceuticalSEC Form 46 September 2023Common Stock · traded 1 September 2023 · filed 6 September 2023
- exercised options over 3,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 410 May 2023Stock Option (Right to Buy) · traded 9 May 2023 · filed 10 May 2023
- exercised options over 3,000 shares of Ultragenyx PharmaceuticalSEC Form 410 May 2023Common Stock · traded 9 May 2023 · filed 10 May 2023
- had shares withheld for tax on 14 shares of Ultragenyx PharmaceuticalSEC Form 418 April 2023Common Stock · traded 16 April 2023 · filed 18 April 2023
- returned to the issuer 181 shares of Ultragenyx PharmaceuticalSEC Form 418 April 2023Common Stock · traded 16 April 2023 · filed 18 April 2023
- was granted 10,120 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 43 March 2023Stock Option (Right to Buy) · traded 1 March 2023 · filed 3 March 2023
- was granted 7,590 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2023Common Stock · traded 1 March 2023 · filed 3 March 2023
- ▼ sold on the open market 100 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2023Common Stock · traded 1 March 2023 · filed 3 March 2023
- returned to the issuer 1,333 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2023Common Stock · traded 1 March 2023 · filed 3 March 2023
- ▼ sold on the open market 639 shares of Ultragenyx PharmaceuticalSEC Form 42 March 2023Common Stock · traded 28 February 2023 · filed 2 March 2023
- ▼ sold on the open market 2,031 shares of Ultragenyx PharmaceuticalSEC Form 422 December 2022Common Stock · traded 21 December 2022 · filed 22 December 2022
- was granted 1,000 shares of Ultragenyx PharmaceuticalSEC Form 48 September 2022Common Stock · traded 1 September 2022 · filed 8 September 2022
- ▼ sold on the open market 132 shares of Ultragenyx PharmaceuticalSEC Form 419 April 2022Common Stock · traded 16 April 2022 · filed 19 April 2022
- was granted 7,400 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 43 March 2022Stock Option (Right to Buy) · traded 1 March 2022 · filed 3 March 2022
- ▼ sold on the open market 843 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2022Common Stock · traded 1 March 2022 · filed 3 March 2022
- was granted 3,710 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2022Common Stock · traded 1 March 2022 · filed 3 March 2022
- gave away 819 shares of Ultragenyx PharmaceuticalSEC Form 418 October 2021Common Stock · traded 13 September 2021 · filed 18 October 2021
- ▼ sold on the open market 140 shares of Ultragenyx PharmaceuticalSEC Form 418 October 2021Common Stock · traded 14 October 2021 · filed 18 October 2021
- ▼ sold on the open market 142 shares of Ultragenyx PharmaceuticalSEC Form 410 May 2021Common Stock · traded 6 May 2021 · filed 10 May 2021
- was granted 1,500 shares of Ultragenyx PharmaceuticalSEC Form 419 April 2021Common Stock · traded 16 April 2021 · filed 19 April 2021
- ▼ sold on the open market 3,000 shares of Ultragenyx PharmaceuticalSEC Form 49 March 2021Common Stock · traded 8 March 2021 · filed 9 March 2021
- was granted 4,655 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 43 March 2021Stock Option (Right to Buy) · traded 1 March 2021 · filed 3 March 2021
- was granted 1,560 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2021Common Stock · traded 1 March 2021 · filed 3 March 2021
- ▼ sold on the open market 732 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2021Common Stock · traded 1 March 2021 · filed 3 March 2021
- gave away 934 shares of Ultragenyx PharmaceuticalSEC Form 43 February 2021Common Stock · traded 6 November 2020 · filed 3 February 2021
- exercised options over 4,000 shares of Ultragenyx PharmaceuticalSEC Form 48 January 2021Common Stock · traded 7 January 2021 · filed 8 January 2021
- ▼ sold on the open market 4,000 shares of Ultragenyx PharmaceuticalSEC Form 48 January 2021Common Stock · traded 7 January 2021 · filed 8 January 2021
- exercised options over 4,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 48 January 2021Stock Option · traded 7 January 2021 · filed 8 January 2021
- ▼ sold on the open market 146 shares of Ultragenyx PharmaceuticalSEC Form 416 October 2020Common Stock · traded 14 October 2020 · filed 16 October 2020
- exercised options over 2,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 410 July 2020Stock Option (Right to Buy) · traded 8 July 2020 · filed 10 July 2020
- ▼ sold on the open market 638 shares of Ultragenyx PharmaceuticalSEC Form 410 July 2020Common Stock · traded 8 July 2020 · filed 10 July 2020
- exercised options over 2,000 shares of Ultragenyx PharmaceuticalSEC Form 410 July 2020Common Stock · traded 8 July 2020 · filed 10 July 2020
- ▼ sold on the open market 2,000 shares of Ultragenyx PharmaceuticalSEC Form 410 July 2020Common Stock · traded 8 July 2020 · filed 10 July 2020
- exercised options over 1,500 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 46 July 2020Stock Option (Right to Buy) · traded 1 July 2020 · filed 6 July 2020
- ▼ sold on the open market 1,111 shares of Ultragenyx PharmaceuticalSEC Form 46 July 2020Common Stock · traded 1 July 2020 · filed 6 July 2020
- exercised options over 1,500 shares of Ultragenyx PharmaceuticalSEC Form 46 July 2020Common Stock · traded 1 July 2020 · filed 6 July 2020
- ▼ sold on the open market 1,500 shares of Ultragenyx PharmaceuticalSEC Form 46 July 2020Common Stock · traded 1 July 2020 · filed 6 July 2020
- had shares withheld for tax on 433 shares of Ultragenyx PharmaceuticalSEC Form 427 May 2020Common Stock · traded 25 May 2020 · filed 27 May 2020
- ▼ sold on the open market 260 shares of Ultragenyx PharmaceuticalSEC Form 427 May 2020Common Stock · traded 26 May 2020 · filed 27 May 2020
- exercised options over 1,500 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 419 May 2020Stock Option (Right to Buy) · traded 15 May 2020 · filed 19 May 2020
- ▼ sold on the open market 961 shares of Ultragenyx PharmaceuticalSEC Form 419 May 2020Common Stock · traded 15 May 2020 · filed 19 May 2020
- exercised options over 1,500 shares of Ultragenyx PharmaceuticalSEC Form 419 May 2020Common Stock · traded 15 May 2020 · filed 19 May 2020
- ▼ sold on the open market 1,500 shares of Ultragenyx PharmaceuticalSEC Form 419 May 2020Common Stock · traded 15 May 2020 · filed 19 May 2020
- had shares withheld for tax on 138 shares of Ultragenyx PharmaceuticalSEC Form 48 May 2020Common Stock · traded 6 May 2020 · filed 8 May 2020
- had shares withheld for tax on 140 shares of Ultragenyx PharmaceuticalSEC Form 421 April 2020Common Stock · traded 19 April 2020 · filed 21 April 2020
- was granted 13,280 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 44 March 2020Stock Option (Right to Buy) · traded 1 March 2020 · filed 4 March 2020
- was granted 4,400 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2020Common Stock · traded 1 March 2020 · filed 4 March 2020
- was granted 7,480 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 43 March 2020Stock Option (Right to Buy) · traded 1 March 2020 · filed 3 March 2020
- was granted 1,500 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2020Common Stock · traded 1 March 2020 · filed 3 March 2020
- had shares withheld for tax on 388 shares of Ultragenyx PharmaceuticalSEC Form 43 March 2020Common Stock · traded 1 March 2020 · filed 3 March 2020
- ▼ sold on the open market 1,000 shares of Ultragenyx PharmaceuticalSEC Form 415 January 2020Common Stock · traded 14 January 2020 · filed 15 January 2020
- was granted 800 shares of Ultragenyx PharmaceuticalSEC Form 416 October 2019Common Stock · traded 14 October 2019 · filed 16 October 2019
- had shares withheld for tax on 433 shares of Ultragenyx PharmaceuticalSEC Form 429 May 2019Common Stock · traded 25 May 2019 · filed 29 May 2019
- had shares withheld for tax on 156 shares of Ultragenyx PharmaceuticalSEC Form 422 May 2019Common Stock · traded 21 May 2019 · filed 22 May 2019
- was granted 800 shares of Ultragenyx PharmaceuticalSEC Form 47 May 2019Common Stock · traded 6 May 2019 · filed 7 May 2019
- had shares withheld for tax on 138 shares of Ultragenyx PharmaceuticalSEC Form 423 April 2019Common Stock · traded 19 April 2019 · filed 23 April 2019
- was granted 6,840 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 417 April 2019Stock Option (Right to Buy) · traded 1 March 2019 · filed 17 April 2019
- was granted 1,390 shares of Ultragenyx PharmaceuticalSEC Form 417 April 2019Common Stock · traded 1 March 2019 · filed 17 April 2019
- ▼ sold on the open market 254 shares of Ultragenyx PharmaceuticalSEC Form 417 April 2019Common Stock · traded 5 March 2019 · filed 17 April 2019
- was granted 6,840 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 44 March 2019Stock Option (Right to Buy) · traded 1 March 2019 · filed 4 March 2019
- was granted 1,390 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2019Common Stock · traded 1 March 2019 · filed 4 March 2019
- had shares withheld for tax on 246 shares of Ultragenyx PharmaceuticalSEC Form 44 March 2019Common Stock · traded 1 March 2019 · filed 4 March 2019
- exercised options over 2,448 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 42 January 2019Stock Option (Right to Buy) · traded 2 January 2019 · filed 2 January 2019
- exercised options over 2,448 shares of Ultragenyx PharmaceuticalSEC Form 42 January 2019Common Stock · traded 2 January 2019 · filed 2 January 2019
- exercised options over 2,955 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 415 June 2018Stock Option (Right to Buy) · traded 15 June 2018 · filed 15 June 2018
- exercised options over 2,955 shares of Ultragenyx PharmaceuticalSEC Form 415 June 2018Common Stock · traded 15 June 2018 · filed 15 June 2018
- ▼ sold on the open market 955 shares of Ultragenyx PharmaceuticalSEC Form 415 June 2018Common Stock · traded 15 June 2018 · filed 15 June 2018
- ▼ sold on the open market 1,338 shares of Ultragenyx PharmaceuticalSEC Form 413 June 2018Common Stock · traded 13 June 2018 · filed 13 June 2018
- had shares withheld for tax on 433 shares of Ultragenyx PharmaceuticalSEC Form 429 May 2018Common Stock · traded 25 May 2018 · filed 29 May 2018
- had shares withheld for tax on 156 shares of Ultragenyx PharmaceuticalSEC Form 422 May 2018Common Stock · traded 21 May 2018 · filed 22 May 2018
- was granted 799 shares of Ultragenyx PharmaceuticalSEC Form 419 April 2018Common Stock · traded 19 April 2018 · filed 19 April 2018
- was granted 7,975 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 45 March 2018Stock Option (Right to Buy) · traded 1 March 2018 · filed 5 March 2018
- was granted 1,313 shares of Ultragenyx PharmaceuticalSEC Form 45 March 2018Common Stock · traded 1 March 2018 · filed 5 March 2018
- had shares withheld for tax on 110 shares of Ultragenyx PharmaceuticalSEC Form 45 March 2018Common Stock · traded 1 March 2018 · filed 5 March 2018
- ▼ sold on the open market 480 shares of Ultragenyx PharmaceuticalSEC Form 426 May 2017Common Stock · traded 26 May 2017 · filed 26 May 2017
- had shares withheld for tax on 166 shares of Ultragenyx PharmaceuticalSEC Form 422 May 2017Common Stock · traded 21 May 2017 · filed 22 May 2017
- ▼ sold on the open market 2,500 shares of Ultragenyx PharmaceuticalSEC Form 410 March 2017Common Stock · traded 9 March 2017 · filed 10 March 2017
- was granted 1,075 shares of Ultragenyx PharmaceuticalSEC Form 42 March 2017Common Stock · traded 1 March 2017 · filed 2 March 2017
- was granted 6,450 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 42 March 2017Employee Stock Option (Right to Buy) · traded 1 March 2017 · filed 2 March 2017
- exercised options over 1,500 shares of Ultragenyx PharmaceuticalSEC Form 418 November 2016Common Stock · traded 17 June 2015 · filed 18 November 2016
- ▼ sold on the open market 1,500 shares of Ultragenyx PharmaceuticalSEC Form 418 November 2016Common Stock · traded 17 June 2015 · filed 18 November 2016
- exercised options over 2,000 shares of Ultragenyx PharmaceuticalSEC Form 418 November 2016Common Stock · traded 16 November 2016 · filed 18 November 2016
- ▼ sold on the open market 2,000 shares of Ultragenyx PharmaceuticalSEC Form 418 November 2016Common Stock · traded 16 November 2016 · filed 18 November 2016
- exercised options over 2,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 418 November 2016Stock Options (Right to buy) · traded 16 November 2016 · filed 18 November 2016
- was granted 5,000 shares of Ultragenyx PharmaceuticalSEC Form 427 May 2016Common Stock · traded 25 May 2016 · filed 27 May 2016
- was granted 10,000 shares of Ultragenyx Pharmaceutical (a derivative holding)SEC Form 427 May 2016Employee Stock Option (right to buy) · traded 25 May 2016 · filed 27 May 2016
- had shares withheld for tax on 166 shares of Ultragenyx PharmaceuticalSEC Form 424 May 2016Common Stock · traded 21 May 2016 · filed 24 May 2016
- exercised options over 1,000 shares of Ultragenyx PharmaceuticalSEC Form 417 February 2016Common Stock · traded 12 February 2016 · filed 17 February 2016
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.