Ultragenyx Pharmaceutical Inc. SEC filings

Filings

1. 8-KUltragenyx Pharmaceutical Inc.RARE5d

   Ultragenyx sells PRV for $203M

   • Entered PRV asset purchase agreement on 10/8/2026
   • Sold PRV to buyer for $203M cash
   • PRV awarded by FDA on 9/17/2026 for MPS IIIA treatment
2. 8-KUltragenyx Pharmaceutical Inc.RAREOct 8

   Ultragenyx sells PRV for $210M

   • Sold PRV on 10/6/2026
   • $210M cash payment
   • 20% to NIH per 2018 agreement
3. 8-KUltragenyx Pharmaceutical Inc.RARESep 17

   Current report

4. 4Ultragenyx Pharmaceutical Inc.RARESep 15

   Theodore Alan Huizenga, insider filing for RARE

   Theodore Alan Huizenga, reporting

5. 144Ultragenyx Pharmaceutical Inc.RARESep 15

   Theodore Alan Huizenga, planned sale of RARE shares

   Theodore Alan Huizenga, reporting

6. 4Ultragenyx Pharmaceutical Inc.RARESep 8

   Theodore Alan Huizenga, insider filing for RARE

   Theodore Alan Huizenga, reporting

7. 8-KUltragenyx Pharmaceutical Inc.RARESep 2

   Current report

8. 8-KUltragenyx Pharmaceutical Inc.RAREAug 19

   Current report

9. SCHEDULE 13GUltragenyx Pharmaceutical Inc.RAREAug 14

   Ownership stake disclosure by RTW INVESTMENTS, LP

   RTW INVESTMENTS, LP, filed by

10. SCHEDULE 13GUltragenyx Pharmaceutical Inc.RAREAug 13

    Ownership stake disclosure by AQR CAPITAL MANAGEMENT LLC

    AQR CAPITAL MANAGEMENT LLC, filed by

11. 8-KUltragenyx Pharmaceutical Inc.RAREAug 11

    Current report

12. SCHEDULE 13GUltragenyx Pharmaceutical Inc.RAREAug 7

    Ownership stake disclosure by STATE STREET CORP

    STATE STREET CORP, filed by

13. 8-KUltragenyx Pharmaceutical Inc.RAREAug 4

    Current report

14. 4Ultragenyx Pharmaceutical Inc.RAREAug 4

    2 insider filings

    Karah Herdman Parschauer, insider filing for RARE

    Show all 2

    • 4Insider filing for RAREAug 4
    • 4Insider filing for RAREAug 4

    Karah Herdman Parschauer, reporting

15. 144Ultragenyx Pharmaceutical Inc.RAREAug 3

    Howard Horn, planned sale of RARE shares

    Howard Horn, reporting

16. SCHEDULE 13G/AUltragenyx Pharmaceutical Inc.RAREJul 31

    2 13G filings

    Ownership stake disclosure by VANGUARD PORTFOLIO MANAGEMENT LLC (amended)

    Show all 2

    • SCHEDULE 13G/AOwnership stake disclosure (amended)Jul 31
    • SCHEDULE 13GOwnership stake disclosureJul 31

    VANGUARD PORTFOLIO MANAGEMENT LLC, filed by

17. SCHEDULE 13G/AUltragenyx Pharmaceutical Inc.RAREJul 30

    Ownership stake disclosure by BlackRock, Inc. (amended)

    BlackRock, Inc., filed by

18. 4Ultragenyx Pharmaceutical Inc.RAREJul 6

    Howard Horn, insider filing for RARE

    Howard Horn, reporting

19. 144Ultragenyx Pharmaceutical Inc.RAREJul 1

    Howard Horn, planned sale of RARE shares

    Howard Horn, reporting

20. 4Ultragenyx Pharmaceutical Inc.RAREJun 15

    2 insider filings

    Sanders Corazon (Corsee) D., insider filing for RARE

    Show all 2

    • 4Insider filing for RAREJun 15
    • 4Insider filing for RAREJun 15

    Corazon (Corsee) D. Sanders, reporting

21. 144Ultragenyx Pharmaceutical Inc.RAREJun 15

    2 Form 144 notices

    Karah Herdman Parschauer, planned sale of RARE shares

    Show all 2

    • 144Planned insider sale of RARE sharesJun 15
    • 144Planned insider sale of RARE sharesJun 15

    Karah Herdman Parschauer, reporting

22. S-8Ultragenyx Pharmaceutical Inc.RAREJun 12

    Employee stock plan registration

23. 4Ultragenyx Pharmaceutical Inc.RAREJun 1

    Howard Horn, insider filing for RARE

    Howard Horn, reporting

24. 144Ultragenyx Pharmaceutical Inc.RAREJun 1

    Howard Horn, planned sale of RARE shares

    Howard Horn, reporting

25. 4Ultragenyx Pharmaceutical Inc.RAREMay 18

    7 insider filings

    Matthew K Fust, insider filing for RARE

    Show all 7

    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18
    • 4Insider filing for RAREMay 18

    Matthew K Fust, reporting

26. 144Ultragenyx Pharmaceutical Inc.RAREMay 18

    Shehnaaz Suliman, planned sale of RARE shares

    Shehnaaz Suliman, reporting

27. 8-KUltragenyx Pharmaceutical Inc.RAREMay 18

    Current report

28. SCHEDULE 13GUltragenyx Pharmaceutical Inc.RAREMay 12

    Ownership stake disclosure by STATE STREET CORP

    STATE STREET CORP, filed by

29. 4Ultragenyx Pharmaceutical Inc.RAREMay 6

    Eric Crombez, insider filing for RARE

    Eric Crombez, reporting

30. 8-KUltragenyx Pharmaceutical Inc.RAREMay 5

    Current report

31. 4Ultragenyx Pharmaceutical Inc.RAREMay 4

    Howard Horn, insider filing for RARE

    Howard Horn, reporting

32. 144Ultragenyx Pharmaceutical Inc.RAREMay 1

    Howard Horn, planned sale of RARE shares

    Howard Horn, reporting

33. DEFA14AUltragenyx Pharmaceutical Inc.RAREApr 30

    Additional proxy materials

34. SCHEDULE 13GUltragenyx Pharmaceutical Inc.RAREApr 29

    Ownership stake disclosure by VANGUARD PORTFOLIO MANAGEMENT LLC

    VANGUARD PORTFOLIO MANAGEMENT LLC, filed by

35. 4Ultragenyx Pharmaceutical Inc.RAREApr 24

    Theodore Alan Huizenga, insider filing for RARE

    Theodore Alan Huizenga, reporting

36. 4Ultragenyx Pharmaceutical Inc.RAREApr 20

    5 insider filings

    Emil D Kakkis, insider filing for RARE

    Show all 5

    • 4Insider filing for RAREApr 20
    • 4Insider filing for RAREApr 20
    • 4Insider filing for RAREApr 20
    • 4Insider filing for RAREApr 20
    • 4Insider filing for RAREApr 20

    Emil D Kakkis, reporting

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