Ticker · CUSIP 031652100

AMKR

AMKOR TECHNOLOGY INC
Technology·Semiconductor Equipment & Materials
···Share
Holders (tracked)
17
Combined shares
13,379,550
Combined value
$528.22M
Last close
$62.90
Quarter
2025Q4
Tracked holders · last 8 quarters
+5 vs previous quarter over the last 8.
17182024Q12025Q4
Price is +59.3% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

25 events
  1. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +6,800 shares · 2025Q4
    Position
  2. Ken Griffin (Citadel Advisors) added2026-02-17
    +594,740 shares · 2025Q4
    Position
  3. D.E. Shaw & Co. added2026-02-17
    +35,886 shares · 2025Q4
    Position
  4. AQR Capital Management trimmed2026-02-17
    −911,554 shares · 2025Q4
    Position
  5. Two Sigma Investments added2026-02-17
    +514,926 shares · 2025Q4
    Position
  6. Wellington Management trimmed2026-02-17
    −220,720 shares · 2025Q4
    Position
  7. Izzy Englander (Millennium Mgmt) trimmed2026-02-17
    −504,254 shares · 2025Q4
    Position
  8. Steve Cohen (Point72) added2026-02-17
    +2,895,298 shares · 2025Q4
    Position
  9. T. Rowe Price added2026-02-17
    +50,015 shares · 2025Q4
    Position
  10. Glen Kacher (Light Street Capital) opened position2026-02-17
    +287,895 shares · 2025Q4
    Position
  11. Ray Dalio (Bridgewater Associates) opened position2026-02-13
    +76,139 shares · 2025Q4
    Position
  12. Renaissance Technologies exited2026-02-12
    −343,000 shares · 2025Q4
    Position
  13. Norges Bank (Norway SWF) opened position2026-02-10
    +1,360,226 shares · 2025Q4
    Position
  14. Ken Fisher (Fisher Asset Mgmt) added2026-02-09
    +1,407,109 shares · 2025Q4
    Position
  15. Two Sigma Investments added2025-11-14
    +10,114 shares · 2025Q3
    Position
  16. D.E. Shaw & Co. trimmed2025-11-14
    −1,218,833 shares · 2025Q3
    Position
  17. AQR Capital Management added2025-11-14
    +653,489 shares · 2025Q3
    Position
  18. Izzy Englander (Millennium Mgmt) trimmed2025-11-14
    −586,809 shares · 2025Q3
    Position
  19. Steve Cohen (Point72) trimmed2025-11-14
    −322,497 shares · 2025Q3
    Position
  20. T. Rowe Price added2025-11-14
    +3,867 shares · 2025Q3
    Position
  21. Wellington Management added2025-11-14
    +375,924 shares · 2025Q3
    Position
  22. Renaissance Technologies trimmed2025-11-13
    −782,100 shares · 2025Q3
    Position
  23. Norges Bank (Norway SWF) exited2025-11-13
    −820,456 shares · 2025Q3
    Position
  24. Ken Fisher (Fisher Asset Mgmt) added2025-11-12
    +65,485 shares · 2025Q3
    Position
  25. Norges Bank (Norway SWF) trimmed2025-11-12
    −60,333 shares · 2024Q3
    Position

Insider activity

No insider transactions in the last 30 days.
View full insider history for AMKR →
Follow-the-investor returns
If you'd copied each holder of AMKR…
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
AQR Capital Management2016Q1$23.67+165.8%$207.6M
Paul Tudor Jones (Tudor Investment)2016Q1$24.27+159.2%$428K
D.E. Shaw & Co.2016Q1$26.15+140.5%$9.7M
Wellington Management2016Q1$29.19+115.5%$27.6M
Ray Dalio (Bridgewater Associates)2019Q4$29.41+113.9%$4.8M
T. Rowe Price2016Q1$29.59+112.6%$8.2M
Ken Griffin (Citadel Advisors)2016Q1$34.41+82.8%$15.4M
Ken Griffin (Citadel Advisors)2016Q1$34.41+82.8%$15.4M
Ken Griffin (Citadel Advisors)2016Q1$34.41+82.8%$15.4M
Izzy Englander (Millennium Mgmt)2016Q1$35.46+77.4%$14.9M
Izzy Englander (Millennium Mgmt)2016Q1$35.46+77.4%$14.9M
Ken Fisher (Fisher Asset Mgmt)2022Q4$35.72+76.1%$131.8M
Two Sigma Investments2016Q1$38.23+64.5%$34.8M
Steve Cohen (Point72)2017Q1$39.36+59.8%$192.7M
Steve Cohen (Point72)2017Q1$39.36+59.8%$192.7M
Glen Kacher (Light Street Capital)2025Q4$39.48+59.3%$18.1M
Norges Bank (Norway SWF)2016Q1$809.73-92.2%$85.6M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.
New positions4
Added to6
Trimmed3
Exited1

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
14
$21.91B
2022Q2
15
$14.20B
2022Q3
15
$279.1M
2022Q4
16
$406.2M
2023Q1
16
$459.7M
2023Q2
18
$535.1M
2023Q3
17
$420.7M
2023Q4
13
$662.2M
2024Q1
18
$674.4M
2024Q2
15
$759.0M
2024Q3
12
$216.9M
2024Q4
13
$183.9M
2025Q1
14
$168.1M
2025Q2
16
$237.9M
2025Q3
12
$219.1M
2025Q4
17
$528.2M

Who owns AMKR

17 super-investors · 2025Q4
Tracked stake
13.38M
shares
Combined value
$528M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New4Added9Trim4
#ManagerSharesValue
1AQR Capital Management3.30M$130M
2Steve Cohen
Point72
3.06M$121M
3Ken Fisher
Fisher Asset Mgmt
2.10M$83M
4Norges Bank
Norway SWF
1.36M$54M
5Ken Griffin
Citadel Advisors
932.7K$37M
6Two Sigma Investments552.8K$22M
7Wellington Management439.1K$17M
8Ken Griffin
Citadel Advisors
426.1K$17M
9Glen Kacher
Light Street Capital
287.9K$11M
10Ken Griffin
Citadel Advisors
244.8K$10M
11Izzy Englander
Millennium Mgmt
236.2K$9M
12D.E. Shaw & Co.154.8K$6M
13T. Rowe Price131.0K$5M
14Ray Dalio
Bridgewater Associates
76.1K$3M
15Izzy Englander
Millennium Mgmt
49.3K$2M
16Steve Cohen
Point72
22.7K$896K
17Paul Tudor Jones
Tudor Investment
6.8K$268K

Recent moves

20 transactions
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