UMC posts February 2026 sales and derivatives data

United Microelectronics Corporation reported February 2026 net sales of NT$ 19,345,126 thousand, up 6.33% from NT$ 18,193,515 thousand a year earlier.

Rhea-AI Filing Summary

United Microelectronics Corporation reported February 2026 net sales of NT$ 19,345,126 thousand, up 6.33% from NT$ 18,193,515 thousand a year earlier. Year-to-date 2026 net sales reached NT$ 40,207,276 thousand, a 5.81% increase over NT$ 38,000,310 thousand in 2025.

The company reported no funds lent to other parties and no endorsements or guarantees for February 2026. In financial derivatives, unwritten-off forward contracts totaled NT$ 685,740 thousand with a fair value of NT$ 8,522 thousand and net profit from fair value of NT$ 9,176 thousand, alongside realized loss of NT$ 2,510 thousand on written-off forwards of NT$ 1,008,616 thousand.

UMC also plans to attend the “2026 Taiwan Corporate Day” hosted by Citi on March 9–10, 2026, and the “Taiwan CEO-CFO Conference” hosted by J.P. Morgan on March 11–12, 2026, both in Taipei.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What February 2026 net sales did UMC (UMC) report?

UMC reported February 2026 net sales of NT$ 19,345,126 thousand. This compares with NT$ 18,193,515 thousand in February 2025, representing a 6.33% year-over-year increase in monthly sales performance for the semiconductor manufacturer.

How did UMC’s year-to-date 2026 net sales compare with 2025?

Year-to-date 2026 net sales for UMC were NT$ 40,207,276 thousand. This exceeded the 2025 year-to-date figure of NT$ 38,000,310 thousand, reflecting a 5.81% increase in cumulative revenue for the period through February.

Did UMC lend funds to other parties or issue guarantees in February 2026?

UMC reported no funds lent to other parties in February 2026. The company also disclosed no endorsements and guarantees outstanding for the period, indicating no such off-balance-sheet exposures in these categories during the month.

What financial derivatives positions did UMC disclose for February 2026?

UMC disclosed unwritten-off forward contracts of NT$ 685,740 thousand with fair value of NT$ 8,522 thousand. Net profit from fair value changes was NT$ 9,176 thousand, while written-off forwards totaled NT$ 1,008,616 thousand with a realized loss of NT$ 2,510 thousand.

Which investor conferences will UMC (UMC) attend in March 2026?

UMC will attend “2026 Taiwan Corporate Day” hosted by Citi on March 9–10, 2026 at Shangri-La Far Eastern, Taipei. It will also join the “Taiwan CEO-CFO Conference” hosted by J.P. Morgan on March 11–12, 2026 at Grand Hyatt Taipei.

Why did UMC issue this March 5, 2026 report?

UMC issued this report to summarize February 2026 operating metrics and activities. It covers net sales results, any funds lent, endorsements and guarantees, financial derivatives transactions, and schedules for institutional investor conferences in early March 2026 in Taipei.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 03/05/2026 - 06:00 AM Learn about SEC filing dates

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

March 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: March 5, 2026

2

EXHIBIT INDEX

Exhibit		Description
99		6K on 03/05/2026

3

www.umc.com

Exhibit

Exhibit Description

99.1 Announcement on 2026/03/02: UMC will attend investor conferences on 2026/03/09

99.2 Announcement on 2026/03/02: UMC will attend investor conferences on 2026/03/11

99.3 Announcement on 2026/03/05: February Revenue

Exhibit 99.1

UMC will attend investor conferences on 2026/03/09

1. Date of institutional investor conference: 2026/03/09~2026/03/10

2. Time of institutional investor conference: 09:00 AM

3. Location of institutional investor conference: Shangri-La Far Eastern, Taipei

4. Outline of institutional investor conference:

The Company will attend the “2026 Taiwan Corporate Day”, held by Citi.

5. Any other matters that need to be specified: None

Exhibit 99.2

UMC will attend investor conferences on 2026/03/11

1. Date of institutional investor conference: 2026/03/11~2026/03/12

2. Time of institutional investor conference: 09:00 AM

3. Location of institutional investor conference: Grand Hyatt Taipei

4. Outline of institutional investor conference:

The Company will attend the “Taiwan CEO-CFO Conference”, held by J.P. Morgan.

5. Any other matters that need to be specified: None

Exhibit 99.3

United Microelectronics Corporation

March 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 February 2026.

1)Sales volume (NT$ Thousand)

Period	Items	2026	2025	Changes	%
February	Net sales	19,345,126	18,193,515	1,151,611	6.33%
Year-to-Date	Net sales	40,207,276	38,000,310	2,206,966	5.81%

2)Funds lent to other parties (NT$ Thousand): None

3)Endorsements and guarantees (NT$ Thousand): None

4)Financial derivatives transactions:

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	685,740	0
Fair Value	0	0	8,522	0
Net profit (loss) from Fair Value	0	0	9,176	0
Written-off Trading
Contracts	0	0	1,008,616	0
Realized profit (loss)	0	0	(2,510)	0

Filing Exhibits & Attachments

1 document

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