United Microelectronic Corp. (UMC)
NYSE: UMC · Semiconductors & Related Devices · Taipei, TW · filing with the SEC since 1997
Who owns United Microelectronic Corp.
As filed with the SECHolders of 5% or more
1
Blackrock, Inc. holds 6.5% of Common Stock, as its SCHEDULE 13G/A filed Apr 29, 2026 says.
Directors and officers
30
report now, of 30 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 1 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Apr 29, 2026 · Common Stock
What UMC reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Faraday Technology Corp
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Hsun Chieh Capital Corp
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Hsun Chieh Investment Co., Ltd
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
M T I C Holdings Pte Ltd
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Puriumfil Inc
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Silicon Integrated Systems Corp. (Sis)
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Translink Capital Partners I L P
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
Tri Knight Capital Corporation
An investee · associate · invested in, named in the 20-F filed Apr 30, 2026
26 subsidiaries in 10 countries, from the list filed with the 20-F filed Apr 30, 2026.
Insider tradesForm 4
5sales
0purchases
0sales on a scheduled plan
3people selling
$526Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 30 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Liu Chitung | CFO & SVP | 3 | $523M | 0 | 0 | $0 |
| Hu Che-Jen | Vice President | 1 | $1.7M | 0 | 0 | $0 |
| Lin Jen-Tsung | Vice President | 1 | $1.6M | 0 | 0 | $0 |