United Microelectronics October sales rise 18.33%
The non-hedging derivatives table reports a net loss from fair value of NT$59.965 million and realized losses of NT$40.594 million.
Sentiment and the balance of points
Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
Rhea-AI Filing Summary
United Microelectronics Corporation (UMC) reported October 2026 net sales of NT$25,197.532 million, up 18.33% from NT$21,294.974 million in October 2025. Year-to-date net sales through October 2026 were NT$229,207.213 million, up 16.33% from NT$197,038.628 million in the same 2025 period.
On October 28, 2026, the board resolved to lend Wavetek up to NT$1,000 million; the amount actually lent as of October 31, 2026 was NT$0 million.
How this balance works
Rhea-AI gives every point it takes from this document a weight. Minor counts 1, Moderate 3 and Major 9, so one Major point outweighs several Minor ones. The bar adds up the weights on each side, and when neither side holds more than 65% of the total the balance reads Mixed.
It reads the document as published, with the same rules for every company, and it does not look at what the market expected or at how the stock traded, so a point can be objectively good on a day the stock falls.
Rhea-AI Sentiment measures something else, the tone of the wording.
Positive
- Moderate pointOctober net sales increased 18.33% year over year.
- Minor pointYear-to-date net sales increased 16.33% through October 2026.
Negative
- None.
Filing Explained
The derivatives schedule, marked as not under hedging accounting, lists
Key Figures
Key Terms
Not under hedging accounting financial
Unwritten-off Trading Contracts financial
Fair Value financial
Funds lent to other parties financial
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What were UMC's October 2026 net sales?
What were UMC's year-to-date sales through October 2026?
How much did UMC lend to Wavetek?
AI-generated analysis. How Rhea-AI works. Not financial advice.
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
OF THE SECURITIES EXCHANGE ACT OF 1934
November 5, 2026
(Commission File Number: 001-15128)
United Microelectronics Corporation
(Translation of registrant’s name into English)
No. 3 Li-Hsin 2nd Road,
Hsinchu Science Park,
Hsinchu, Taiwan, R.O.C.
(Address of principal executive office)
Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.
Form 20-F Form 40-F
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (1):
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101 (b) (7):
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.
United Microelectronics Corporation |
|
|
|
|
|
By: |
Chitung Liu |
Name: |
Chitung Liu |
Title: |
CFO |
Date: November 5, 2026
2
EXHIBIT INDEX
Exhibit |
|
Description |
99.1 |
|
6K on 11/05/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/11/05: October Revenue
Exhibit 99.1
United Microelectronics Corporation
November 5, 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 October 2026.
Period |
Items |
2026 |
2025 |
Changes |
% |
October |
Net sales |
25,197,532 |
21,294,974 |
3,902,558 |
18.33% |
Year-to-Date |
Net sales |
229,207,213 |
197,038,628 |
32,168,585 |
16.33% |
Balance as of period end |
This Month(actual amount provided) |
Last Month(actual amount provided) |
Limit of lending |
UMC (Note1) |
- |
- |
47,091,677 |
Note1: On October 28, 2026, the board of directors resolved to lend funds to Wavetek for the amount up to NT$ 1,000 million. The actual amount lent to Wavetek as of October 31, 2026 was NT$ 0 million. |
|||
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 |
6,377,840 |
0 |
Fair Value |
0 |
0 |
(60,618) |
0 |
Net profit (loss) from Fair Value |
0 |
0 |
(59,965) |
0 |
Written-off Trading |
|
|
|
|
Contracts |
0 |
0 |
11,585,870 |
0 |
Realized profit (loss) |
0 |
0 |
(40,594) |
0 |