Ticker · CUSIP 90400D108

RARE

ULTRAGENYX PHARMACEUTICAL IN
Healthcare·Biotechnology
···Share
Holders (tracked)
14
Combined shares
15,012,916
Combined value
$345.30M
Last close
$24.81
Quarter
2025Q4
Price · 1Y$24.81-10.88 (-30.48%)H $41.44 · L $18.50 · Avg Vol 1.9M
Congress buy
$20.00$25.00$30.00$35.00$40.00VolJul 25Oct 25Jan 26Apr 26
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
14132024Q12025Q4
Price is +7.9% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

25 events
  1. D.E. Shaw & Co. added2026-02-17
    +107,123 shares · 2025Q4
    Position
  2. Two Sigma Investments added2026-02-17
    +97,869 shares · 2025Q4
    Position
  3. Ken Griffin (Citadel Advisors) added2026-02-17
    +1,995,172 shares · 2025Q4
    Position
  4. Izzy Englander (Millennium Mgmt) added2026-02-17
    +781,431 shares · 2025Q4
    Position
  5. T. Rowe Price trimmed2026-02-17
    −755,808 shares · 2025Q4
    Position
  6. Wellington Management added2026-02-17
    +516,781 shares · 2025Q4
    Position
  7. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +13,416 shares · 2025Q4
    Position
  8. AQR Capital Management added2026-02-17
    +614,315 shares · 2025Q4
    Position
  9. Sands Capital Management trimmed2026-02-13
    −284,129 shares · 2025Q4
    Position
  10. Renaissance Technologies added2026-02-12
    +344,200 shares · 2025Q4
    Position
  11. Norges Bank (Norway SWF) opened position2026-02-10
    +1,261,026 shares · 2025Q4
    Position
  12. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +30,612 shares · 2025Q4
    Position
  13. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −53,139 shares · 2025Q3
    Position
  14. AQR Capital Management added2025-11-14
    +493,849 shares · 2025Q3
    Position
  15. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −387,128 shares · 2025Q3
    Position
  16. Steve Cohen (Point72) exited2025-11-14
    −515,968 shares · 2025Q3
    Position
  17. Two Sigma Investments trimmed2025-11-14
    −250,721 shares · 2025Q3
    Position
  18. D.E. Shaw & Co. trimmed2025-11-14
    −303,161 shares · 2025Q3
    Position
  19. T. Rowe Price trimmed2025-11-14
    −576,094 shares · 2025Q3
    Position
  20. Wellington Management added2025-11-14
    +73,309 shares · 2025Q3
    Position
  21. Renaissance Technologies trimmed2025-11-13
    −186,400 shares · 2025Q3
    Position
  22. Norges Bank (Norway SWF) exited2025-11-13
    −983,638 shares · 2025Q3
    Position
  23. Sands Capital Management trimmed2025-11-13
    −173,632 shares · 2025Q3
    Position
  24. Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
    −17,672 shares · 2025Q3
    Position
  25. Norges Bank (Norway SWF) trimmed2025-11-12
    −61,837 shares · 2024Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for RARE →
Follow-the-investor returns
If you'd copied each holder of RARE…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Ken Griffin (Citadel Advisors)2016Q1$23.12+7.3%$7.4M
Ken Griffin (Citadel Advisors)2016Q1$23.12+7.3%$7.4M
Ken Griffin (Citadel Advisors)2016Q1$23.12+7.3%$7.4M
Izzy Englander (Millennium Mgmt)2016Q1$24.53+1.1%$21.8M
Renaissance Technologies2016Q1$24.74+0.3%$9.1M
AQR Capital Management2016Q1$29.28-15.3%$33.8M
D.E. Shaw & Co.2017Q1$35.19-29.5%$8.6M
Ken Fisher (Fisher Asset Mgmt)2024Q4$39.13-36.6%$4.9M
Two Sigma Investments2016Q4$41.94-40.8%$10.5M
Paul Tudor Jones (Tudor Investment)2017Q1$43.50-43.0%$333K
Sands Capital Management2023Q2$45.18-45.1%$86.5M
Wellington Management2016Q1$55.28-55.1%$61.1M
T. Rowe Price2016Q1$68.14-63.6%$38.6M
Norges Bank (Norway SWF)2016Q1$2013.81-98.8%$31.3M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions2
Added to8
Trimmed2
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
12
$49.64B
2022Q2
13
$41.16B
2022Q3
14
$713.5M
2022Q4
13
$783.1M
2023Q1
15
$706.0M
2023Q2
16
$852.7M
2023Q3
12
$440.0M
2023Q4
12
$682.2M
2024Q1
13
$913.2M
2024Q2
15
$949.0M
2024Q3
16
$954.9M
2024Q4
15
$498.7M
2025Q1
15
$498.3M
2025Q2
17
$460.4M
2025Q3
12
$307.3M
2025Q4
14
$345.3M
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2026-03-03Gilbert CisnerosBuy$1K – $15KPDF ↗
2026-02-18Gilbert CisnerosBuy$1K – $15KPDF ↗
2025-08-08Gilbert CisnerosBuy$1K – $15KPDF ↗
2025-07-15Gilbert CisnerosBuy$1K – $15KPDF ↗

Who owns RARE

14 super-investors · 2025Q4
Tracked stake
15.01M
shares
Combined value
$345M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added10Trim2
#ManagerSharesValue
1Sands Capital Management3.49M$80M
2Wellington Management2.46M$57M
3Ken Griffin
Citadel Advisors
2.33M$54M
4T. Rowe Price1.55M$36M
5AQR Capital Management1.36M$31M
6Norges Bank
Norway SWF
1.26M$29M
7Izzy Englander
Millennium Mgmt
880.6K$20M
8Two Sigma Investments424.0K$10M
9Renaissance Technologies366.1K$8M
10D.E. Shaw & Co.344.8K$8M
11Ken Griffin
Citadel Advisors
298.0K$7M
12Ken Fisher
Fisher Asset Mgmt
198.7K$5M
13Ken Griffin
Citadel Advisors
37.6K$865K
14Paul Tudor Jones
Tudor Investment
13.4K$309K

Recent moves

20 transactions
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