Ticker · CUSIP 40637H109

HALO

HALOZYME THERAPEUTICS INC
Healthcare·Biotechnology
···Share
Holders (tracked)
15
Combined shares
8,863,083
Combined value
$580.21M
Last close
$66.64
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
15132024Q12025Q4
Price is +1.8% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

24 events
  1. Ken Griffin (Citadel Advisors) exited2026-02-17
    −244,801 shares · 2025Q4
    13F
  2. T. Rowe Price trimmed2026-02-17
    −583,387 shares · 2025Q4
    13F
  3. Wellington Management added2026-02-17
    +109 shares · 2025Q4
    13F
  4. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +11,700 shares · 2025Q4
    13F
  5. AQR Capital Management added2026-02-17
    +189,848 shares · 2025Q4
    13F
  6. D.E. Shaw & Co. trimmed2026-02-17
    −1,000,909 shares · 2025Q4
    13F
  7. Two Sigma Investments trimmed2026-02-17
    −598,555 shares · 2025Q4
    13F
  8. Izzy Englander (Millennium Mgmt) added2026-02-17
    +236,364 shares · 2025Q4
    13F
  9. Ray Dalio (Bridgewater Associates) added2026-02-13
    +74,496 shares · 2025Q4
    13F
  10. Renaissance Technologies trimmed2026-02-12
    −437,498 shares · 2025Q4
    13F
  11. Norges Bank (Norway SWF) opened position2026-02-10
    +1,904,922 shares · 2025Q4
    13F
  12. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +56,960 shares · 2025Q4
    13F
  13. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −39,140 shares · 2025Q3
    13F
  14. AQR Capital Management added2025-11-14
    +589,711 shares · 2025Q3
    13F
  15. Izzy Englander (Millennium Mgmt) added2025-11-14
    +537,111 shares · 2025Q3
    13F
  16. Two Sigma Investments added2025-11-14
    +876,086 shares · 2025Q3
    13F
  17. D.E. Shaw & Co. added2025-11-14
    +1,631,571 shares · 2025Q3
    13F
  18. T. Rowe Price trimmed2025-11-14
    −206,768 shares · 2025Q3
    13F
  19. Wellington Management trimmed2025-11-14
    −66,535 shares · 2025Q3
    13F
  20. Renaissance Technologies added2025-11-13
    +661,600 shares · 2025Q3
    13F
  21. Norges Bank (Norway SWF) exited2025-11-13
    −865,568 shares · 2025Q3
    13F
  22. Ray Dalio (Bridgewater Associates) opened position2025-11-13
    +487,081 shares · 2025Q3
    13F
  23. Ken Fisher (Fisher Asset Mgmt) added2025-11-12
    +29,147 shares · 2025Q3
    13F
  24. Norges Bank (Norway SWF) trimmed2025-11-12
    −125,868 shares · 2024Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for HALO →
Follow-the-investor returns
If you'd copied each holder of HALO…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
Ken Fisher (Fisher Asset Mgmt)2016Q1$37.00+80.1%$31.2M
Paul Tudor Jones (Tudor Investment)2017Q2$37.26+78.9%$213K
Paul Tudor Jones (Tudor Investment)2017Q2$37.26+78.9%$213K
T. Rowe Price2016Q1$39.74+67.7%$16.1M
Wellington Management2017Q4$45.50+46.5%$2.5M
Izzy Englander (Millennium Mgmt)2016Q1$62.19+7.2%$3.3M
Izzy Englander (Millennium Mgmt)2016Q1$62.19+7.2%$3.3M
D.E. Shaw & Co.2016Q3$64.46+3.4%$109.9M
AQR Capital Management2016Q1$64.64+3.1%$77.2M
Renaissance Technologies2016Q1$65.95+1.0%$37.5M
Two Sigma Investments2017Q2$68.27-2.4%$47.8M
Ken Griffin (Citadel Advisors)2016Q2$69.08-3.5%$1.3M
Ken Griffin (Citadel Advisors)2016Q2$69.08-3.5%$1.3M
Ray Dalio (Bridgewater Associates)2023Q2$72.04-7.5%$37.4M
Norges Bank (Norway SWF)2016Q1$1847.24-96.4%$126.9M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions2
Added to5
Trimmed4
Exited1

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
14
$48.20B
2022Q2
14
$55.29B
2022Q3
15
$40.0M
2022Q4
15
$1.17B
2023Q1
13
$814.3M
2023Q2
14
$863.5M
2023Q3
14
$798.8M
2023Q4
11
$765.3M
2024Q1
13
$839.7M
2024Q2
14
$1.12B
2024Q3
12
$129.7M
2024Q4
12
$211.4M
2025Q1
11
$132.1M
2025Q2
13
$242.9M
2025Q3
12
$618.5M
2025Q4
15
$580.2M
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2026-03-09Gilbert CisnerosBuy$1K – $15KPDF ↗
2025-03-24Gilbert CisnerosSell (P)$1K – $15KPDF ↗

Who owns HALO

15 super-investors · 2025Q4
Tracked stake
8.86M
shares
Combined value
$580M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added6Trim4Sold2
#ManagerSharesValue
1Norges Bank
Norway SWF
1.90M$128M
2D.E. Shaw & Co.1.65M$111M
3Izzy Englander
Millennium Mgmt
1.46M$99M
4AQR Capital Management1.16M$78M
5Two Sigma Investments717.4K$48M
6Renaissance Technologies562.7K$38M
7Ray Dalio
Bridgewater Associates
561.6K$38M
8Ken Fisher
Fisher Asset Mgmt
467.9K$31M
9Izzy Englander
Millennium Mgmt
50.0K$3M
10Wellington Management37.2K$3M
11Ken Griffin
Citadel Advisors
19.7K$1M
12Ken Griffin
Citadel Advisors
16.2K$1M
13Paul Tudor Jones
Tudor Investment
8.5K$572K
14Paul Tudor Jones
Tudor Investment
3.2K$215K
15T. Rowe Price242.0K$16K

Recent moves

20 transactions
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