www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/09/03: UMC will attend investor conferences on 2026/09/10
99.2 Announcement on 2026/09/03: UMC will attend investor conferences on 2026/09/14~2026/09/15
99.3 Announcement on 2026/09/04: August Revenue
UMC will attend investor conferences on 2026/09/10
1. Date of institutional investor conference: 2026/09/10
2. Time of institutional investor conference: 09:30 PM
3. Location of institutional investor conference: New York Hilton Midtown
4. Outline of institutional investor conference:
The Company will attend the “2026 GEMs Conference”, held by Citi.
5. Any other matters that need to be specified: None
.2
UMC will attend investor conferences on 2026/09/14~2026/09/15
1. Date of institutional investor conference: 2026/09/14~2026/09/15
2. Time of institutional investor conference: 09:00 AM
3. Location of institutional investor conference: W Hotel Taipei
4. Outline of institutional investor conference:
The Company will attend the “Taiwan Summit 2026”, held by UBS.
5. Any other matters that need to be specified: None
.3
United Microelectronics Corporation
September 4, 2026
This is to report the changes or status of 1) Sales volume, 2) Funds lent to other parties, 3) Endorsements and guarantees, and 4) Financial derivative transactions for the period of August 2026.
Period |
Items |
2026 |
2025 |
Changes |
% |
August |
Net sales |
25,044,641 |
19,159,816 |
5,884,825 |
30.71% |
Year-to-Date |
Net sales |
178,659,250 |
155,816,479 |
22,842,771 |
14.66% |
a Not under hedging accounting: NT$ thousand
UMC
Financial instruments |
Option |
Forwards |
IRS |
|
Put |
Call |
|||
Deposit Paid |
0 |
0 |
0 |
0 |
Royalty Income (Paid) |
0 |
0 |
0 |
0 |
Unwritten-off Trading |
|
|
|
|
Contracts |
0 |
0 |
1,138,320 |
0 |
Fair Value |
0 |
0 |
9,719 |
0 |
Net profit (loss) from Fair Value |
0 |
0 |
10,372 |
0 |
Written-off Trading |
|
|
|
|
Contracts |
0 |
0 |
9,159,030 |
0 |
Realized profit (loss) |
0 |
0 |
(33,746) |
0 |