Your Best Stock
Stocks › China Concept Stocks › UMC

United Microelectronics UMC

US equityMarket cap rank #266China Concept Stocks
$24.07
−$0.62 (-2.49%)
Market open · Sep 24, 2:00 pm ET
After hours $24.70 +0.08%
Open$24.02
Prev close$24.68
Day range$23.80 – $24.35
Volume3.69M
Market cap$60.59B
P/E (TTM)23.3
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership55.0%+0.05 pts vs. prior quarter
Institutions holding520-2 vs. prior quarter
Insider trades (recent)0 buys / 0 sellsBalanced
Short interest1.34% of floatDays to cover 3.0 · as of 31 Aug 2026
Short-sale volume share41.2%5-day average of daily volume

Short-sale volume as % of daily volume

36%40%44%49%Aug '26Sep '26Sep '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$4.81M (13 inflow days, 7 outflow days).

Largest holders

  • BlackRock7.75%
  • Capital Investment Trust Corporation5.17%
  • Cathay Securities Investment Trust Co., LTD4.31%
  • Vanguard Capital Management, LLC4.05%
  • Hsun Chieh Investment Co. Ltd.3.51%

By investor type

  • Mutual Fund40.36%
  • Private Company6.93%
  • Public Company3.62%
  • Government Pension Fund2.06%
  • Individual/Insider1.44%
  • Sovereign Wealth Fund1.01%
  • Hedge Fund0.83%
  • Insurance Company0.09%
Institutional holders520
Institutional ownership55.0%

Insider activity

Total transactions28
Bought0
Sold0

Short interest

Report dateShares short% of floatDays to cover
31 Aug 2026 33,668,171 1.3% 3.0
14 Aug 2026 29,695,086 1.2% 2.6
31 Jul 2026 34,193,634 1.4% 1.9
15 Jul 2026 20,511,587 0.8% 1.2
30 Jun 2026 26,177,159 1.0% 1.3
15 Jun 2026 25,331,010 1.0% 1.4
Scroll to Top