UMC (NYSE: UMC) to issue NT$16B 0% five-year convertible bonds
Rhea-AI Filing Summary
United Microelectronics Corporation plans to issue two unsecured convertible bonds totaling up to NT$16 billion in par value, subject to regulatory approval. The 1st Unsecured Convertible Bond is sized at up to NT$12 billion, while the 2nd Unsecured Convertible Bond is up to NT$4 billion.
Both issues are temporarily structured as five-year, 0%-coupon bonds with a face value of NT$100,000 per bond and no physical certificates, settled by book-entry. Proceeds are earmarked for purchasing machinery and equipment. Detailed conversion, put, and call terms will follow relevant regulations and be finalized by the Chairman or a designee after regulatory approval, with an application planned for OTC trading on the Taipei Exchange.
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Insights
UMC is preparing up to NT$16B in zero-coupon convertible financing for capex.
United Microelectronics Corporation plans two unsecured convertible bond issues: up to NT$12 billion via book building and up to NT$4 billion via competitive auction. Both are five-year, 0%-coupon instruments aimed at funding machinery and equipment purchases.
The bonds are convertible, but specific conversion prices, investor put terms, and issuer call conditions will be set later in line with regulations and subject to approval. This structure combines debt financing with potential future equity issuance, leaving the eventual dilution dependent on the final conversion terms and investor behavior.
Key mechanics such as issue dates, final pricing (at or above par), and detailed conversion features will be determined by the Chairman or a designee after regulatory clearance and market assessment. Application for OTC trading on the Taipei Exchange is planned, which would provide secondary liquidity once the bonds are issued.
Key Figures
Key Terms
Unsecured Convertible Bond financial
shelf registration regulatory
book building financial
competitive auction financial
Taipei Exchange (TPEx) market
book-entry transfer financial
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
June 3, 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 |
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By: |
Chitung Liu |
Name: |
Chitung Liu |
Title: |
CFO |
Date: June 3, 2026
2
EXHIBIT INDEX
Exhibit |
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Description |
99 |
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6K on 06/03/2026 |
3
www.umc.com
Exhibit
Exhibit Description
99.1 Announcement on 2026/06/03: The Board of Directors resolved the issuance of the 1st Unsecured Convertible Bond
99.2 Announcement on 2026/06/03: The Board of Directors resolved the issuance of the 2nd Unsecured Convertible Bond
Exhibit 99.1
The Board of Directors resolved the issuance of the 1st Unsecured Convertible Bond
1. Date of the board of directors’ resolution: 2026/06/03
2. Name [issue no.__ of (secured, unsecured) corporate bonds of ___________ (company)]:
United Microelectronics Corporation 1st Unsecured Convertible Bond
3. Whether to adopt shelf registration (Yes/No): No
4. Total amount issued: Up to NT$12 billion in par value
5. Face value per bond: Temporarily set at NT$100,000
6. Issue price: Issued at no less than 101% of par value
7. Issuance period: Temporarily set at five years from the issue date
8. Coupon rate: Temporarily set at 0% per annum
9. Types, names, monetary values and stipulations of collaterals: Not applicable
10. Use of the funds raised by the offering and utilization plan: Purchase of machinery and equipment
11. Underwriting method: Book building
12. Trustees of the corporate bonds: To be decided
13. Underwriter or agent: Horizon Securities Co., Ltd.
14. Guarantor(s) for the issuance: Not applicable
15. Agent for payment of the principal and interest: To be decided
16. Certifying institution: Not applicable
17. Where convertible into shares, the rules for conversion:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
18. Sell-back conditions:
Conditions of the investors’ put: The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
19. Buyback conditions:
Conditions of the issuer’s call: The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
20. Reference date for any additional share exchange, stock swap, or subscription:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
21. Possible dilution of equity in case of any additional share exchange, stock swap, or subscription:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
22. Reasonableness and necessity of capital raising following a cash capital reduction (applicable to companies that have conducted a cash capital reduction in the current year or the preceding year): Not applicable
23. Any other matters that need to be specified:
(1) No physical bond certificates will be printed for the issuance; delivery will be made by book-entry transfer. After approval from the regulators, the Chairman or a person designated by the Chairman will be authorized to determine the issue date, conversion price and other relevant matters, and to apply to the Taipei Exchange (TPEx) for OTC trading.
(2) The related matters of the issuance, including but not limited to the timing of issuance, issuance limit, issue amount, issue price, issuance and conversion terms and conditions, total required proceeds, sources and uses of the proceeds, planned schedule for the use of proceeds, expected benefits, the execution and delivery of relevant
agreements or documents, and other related matters, will be determined and handled by the Chairman or a person designated by the Chairman, as authorized by the Company. Any revisions or adjustments made in response to amendments to laws and regulations, requirements of regulators, operational assessments, market conditions, or changes in objective circumstances, will likewise be determined and handled by the Chairman or a person designated by the Chairman, as authorized by the Company, to the extent permitted by applicable law.
(3) The Chairman or a person designated by the Chairman will be authorized to manage all miscellaneous details.
Exhibit 99.2
The Board of Directors resolved the issuance of the 2nd Unsecured Convertible Bond
1. Date of the board of directors’ resolution: 2026/06/03
2. Name [issue no.__ of (secured, unsecured) corporate bonds of ___________ (company)]:
United Microelectronics Corporation 2nd Unsecured Convertible Bond
3. Whether to adopt shelf registration (Yes/No): No
4. Total amount issued: Up to NT$4 billion in par value
5. Face value per bond: Temporarily set at NT$100,000
6. Issue price: The minimum bid price is set at no less than 100% of par value. The actual total issue amount will be determined based on the results of the competitive auction.
7. Issuance period: Temporarily set at five years from the issue date
8. Coupon rate: Temporarily set at 0% per annum
9. Types, names, monetary values and stipulations of collaterals: Not applicable
10. Use of the funds raised by the offering and utilization plan: Purchase of machinery and equipment
11. Underwriting method: Competitive auction
12. Trustees of the corporate bonds: To be decided
13. Underwriter or agent: Horizon Securities Co., Ltd.
14. Guarantor(s) for the issuance: Not applicable
15. Agent for payment of the principal and interest: To be decided
16. Certifying institution: Not applicable
17. Where convertible into shares, the rules for conversion:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
18. Sell-back conditions:
Conditions of the investors’ put: The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
19. Buyback conditions:
Conditions of the issuer’s call: The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
20. Reference date for any additional share exchange, stock swap, or subscription:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
21. Possible dilution of equity in case of any additional share exchange, stock swap, or subscription:
The related matters will be conducted in accordance with the relevant regulations, and the details will be announced after approval from the regulators.
22. Reasonableness and necessity of capital raising following a cash capital reduction (applicable to companies that have conducted a cash capital reduction in the current year or the preceding year): Not applicable
23. Any other matters that need to be specified:
(1) No physical bond certificates will be printed for the issuance; delivery will be made by book-entry transfer. After approval from the regulators, the Chairman or a person designated by the Chairman will be authorized to determine the issue date, conversion price and other relevant matters, and to apply to the Taipei Exchange (TPEx) for OTC trading.
(2) The related matters of the issuance, including but not limited to the timing of issuance, issuance limit, issue amount, issue price, issuance and conversion terms and
conditions, total required proceeds, sources and uses of the proceeds, planned schedule for the use of proceeds, expected benefits, the execution and delivery of relevant agreements or documents, and other related matters, will be determined and handled by the Chairman or a person designated by the Chairman, as authorized by the Company. Any revisions or adjustments made in response to amendments to laws and regulations, requirements of regulators, operational assessments, market conditions, or changes in objective circumstances, will likewise be determined and handled by the Chairman or a person designated by the Chairman, as authorized by the Company, to the extent permitted by applicable law.
(3) The Chairman or a person designated by the Chairman will be authorized to manage all miscellaneous details.