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Exhibit

Exhibit Description

 

99.1 Announcement on 2026/01/07: December Revenue

 

 

 

 


 

United Microelectronics Corporation

January 7, 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 December 2025.

 

1)
Sales volume (NT$ Thousand)

Period

Items

2025

2024

Changes

%

December

Net sales

19,280,724

18,965,818

314,906

1.66%

Year-to-Date

Net sales

237,553,199

232,302,584

5,250,615

2.26%

 

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

 

3)
Endorsements and guarantees (NT$ Thousand)

Balance as of period end

This Month

(actual amount provided)

Last Month

(actual amount provided)

Limit of lending

UMC

0

0

162,477,099

Note: Since USC(Xiamen)’s syndicated loan from banks has been prepaid early, the Company’s endorsement to USC(Xiamen)’s syndicated loan from banks is released.

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

689,700

0

  Fair Value

0

0

(653)

0

  Net profit (loss) from Fair Value

0

0

384

0

  Written-off Trading

 

 

 

 

  Contracts

0

0

5,277,195

0

  Realized profit (loss)

0

0

(547)

0