UMC
UNITED MICRO SP ADR (UMC)
NYSE
$18.70-$0.19 (-1.01%)
Price as of Oct 23, 2026 8:00 PM EDT
  • $47.4B
    Market Cap
  • 154.82%
    1-Year Change
  • Semiconductors
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK, INC.
1.26%
31.5M
+4.0M (+12.83%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
0.95%
23.6M
+657,234 (+2.78%)
Dec 31, 2024
BLACKROCK INC.
0.93%
23.1M
+980,055 (+4.24%)
Jun 30, 2024
VANGUARD GROUP INC
0.54%
13.5M
-728,404 (-5.39%)
Dec 31, 2025
UBS GROUP AG
0.47%
11.6M
+3.5M (+29.72%)
Jun 30, 2026
GOLDMAN SACHS GROUP INC
0.45%
11.1M
+5.2M (+47.12%)
Jun 30, 2026
BANK OF AMERICA CORP /DE/
0.41%
10.2M
+7.6M (+74.43%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions2.7B (78.39%)
  • Mutual Funds707.8M (20.35%)
  • Insiders43.7M (1.26%)
  • Other0 (0.00%)

Insider Transactions

  • 1.26% (43.7M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 2
    Number of InsiderSelling (last 12 months)
  • $996.4M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
LIN JEN-TSUNG
Vice President
Sell
Sep 22, 2026
$1.6M
10,000
$163.00
1.2M
Liu Chitung
CFO & SVP
Sell
Sep 17, 2026
$58.0M
400,000
$145.00
2.6M
Liu Chitung
CFO & SVP
Sell
Sep 16, 2026
$170.8M
1.2M
$142.33
3.0M
Liu Chitung
CFO & SVP
Sell
Jul 13, 2026
$294.3M
1.9M
$154.89
3.3M