Ticker · CUSIP 68375N103
···Share
Holders (tracked)
10
Combined shares
6,843,517
Combined value
$8.16M
Last close
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
10122024Q12025Q4

SEC event timeline

16 events
  1. −520,900 shares · 2025Q4
    13F
  2. +2,577,558 shares · 2025Q4
    13F
  3. +244,821 shares · 2025Q4
    13F
  4. −846,459 shares · 2025Q4
    13F
  5. +265,268 shares · 2025Q4
    13F
  6. +23,905 shares · 2025Q4
    13F
  7. −59,700 shares · 2025Q4
    13F
  8. −244,821 shares · 2025Q3
    13F
  9. +1,937,516 shares · 2025Q3
    13F
  10. −695,780 shares · 2025Q3
    13F
  11. −581,100 shares · 2025Q3
    13F
  12. −94,220 shares · 2025Q3
    13F
  13. +21,600 shares · 2025Q3
    13F
  14. −39,477 shares · 2025Q3
    13F
  15. −301 shares · 2025Q3
    13F
  16. −203,252 shares · 2024Q3
    13F

Insider activity

No insider transactions in the last 30 days.

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
Added to2
Trimmed2
Exited1

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
14
$13.34B
2022Q2
14
$8.32B
2022Q3
15
$6.2M
2022Q4
15
$60.6M
2023Q1
15
$67.4M
2023Q2
13
$113.7M
2023Q3
14
$77.9M
2023Q4
11
$64.5M
2024Q1
12
$46.8M
2024Q2
12
$43.4M
2024Q3
11
$14.3M
2024Q4
11
$19.3M
2025Q1
10
$28.8M
2025Q2
12
$6.2M
2025Q3
9
$7.6M
2025Q4
10
$8.2M

Who owns OPK

10 super-investors · 2025Q4
Tracked stake
6.84M
shares
Combined value
$8M
% of shares outstanding
shares-out unknown
Quarter action mix
New2Added4Trim2Held2
#ManagerSharesValue
1Ken Griffin
Citadel Advisors
2.86M$4M
2AQR Capital Management2.03M$3M
3Two Sigma Investments734.7K$926K
4Izzy Englander
Millennium Mgmt
265.3K$334K
5Paul Tudor Jones
Tudor Investment
244.8K$308K
6Mario Gabelli
GAMCO
175.0K$221K
7Ken Griffin
Citadel Advisors
80.7K$102K
8Ken Griffin
Citadel Advisors
61.4K$77K
9Ken Fisher
Fisher Asset Mgmt
30.0K$38K
10T. Rowe Price367.2K$463

Recent moves

20 transactions
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