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UMC · United Microelectronics Corp

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$19.79 +0.72 (+3.78%) At close · Aug 28
Market Cap
$49.63B
Shares
2.51B

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 368
Total Value: $5,280,997,799
Total Shares: 194,083,090
Showing 1–100 of 389 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 368 13F filers · Δ vs Mar 31, 2026
Top Holder
16.3%
Sep 2023 → Jun 2026 · range 14.2% – 18.0%
+0.9 pts
Top 5
37.7%
Sep 2023 → Jun 2026 · range 37.7% – 56.6%
−1.0 pts
Top 10
55.8%
Sep 2023 → Jun 2026 · range 55.8% – 73.9%
−1.5 pts
HHI
509
Sep 2023 → Jun 2026 · range 506 – 833
Broadly held+3

Quarterly Activity

vs Mar 31, 2026
New
93
Increased
134
Decreased
111
Sold Out
47
Unchanged
30
Holder count: +46
Institutional value: +227.6%
Shares held: +8.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 389
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1033767 CUSIP 910873405 13F (30d) 282 filings 265 filers Visit website Investor relations