Ticker · CUSIP 910873405

UMC

ADR
UNITED MICROELECTRONICS CORP
···Share
Holders (tracked)
9
Combined shares
18,094,574
Combined value
$142.22M
Last close
Quarter
2025Q4
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 8.
992024Q12025Q4

SEC event timeline

9 events
  1. +1,073,771 shares · 2025Q4
    13F
  2. +870,260 shares · 2025Q4
    13F
  3. +2,144,829 shares · 2025Q4
    13F
  4. +383,488 shares · 2025Q4
    13F
  5. +8,492,466 shares · 2025Q4
    13F
  6. +253,131 shares · 2025Q3
    13F
  7. +3,151,936 shares · 2025Q3
    13F
  8. −477,789 shares · 2025Q3
    13F
  9. −473,632 shares · 2025Q3
    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.
New positions1
Trimmed0
Exited0

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
12
$293.4M
2022Q2
11
$236.8M
2022Q3
13
$252K
2022Q4
13
$183.2M
2023Q1
12
$268.8M
2023Q2
11
$246.8M
2023Q3
12
$230.9M
2023Q4
11
$276.9M
2024Q1
9
$264.0M
2024Q2
8
$301.7M
2024Q3
8
$137.7M
2024Q4
9
$203.7M
2025Q1
8
$100.2M
2025Q2
7
$23.3M
2025Q3
7
$38.8M
2025Q4
9
$142.2M

Who owns UMC

9 super-investors · 2025Q4
Tracked stake
18.09M
shares
Combined value
$142M
% of shares outstanding
shares-out unknown
Quarter action mix
New1Added8
#ManagerSharesValue
1AQR Capital Management9.46M$74M
2Two Sigma Investments5.68M$45M
3Ken Griffin
Citadel Advisors
1.12M$9M
4D.E. Shaw & Co.870.3K$7M
5Izzy Englander
Millennium Mgmt
695.4K$5M
6Ken Griffin
Citadel Advisors
108.0K$849K
7Izzy Englander
Millennium Mgmt
84.4K$663K
8Izzy Englander
Millennium Mgmt
37.2K$292K
9Ken Griffin
Citadel Advisors
35.3K$277K

Recent moves

20 transactions
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