UMC launches up to NT$16 billion zero-coupon unsecured convertible bond offering

• UMC board cleared up to NT$16 billion of unsecured convertible bonds, split between a first tranche of up to NT$12 billion and a second of up to NT$4 billion.
• Proceeds earmarked for machinery and equipment purchases; both offerings set at five-year maturities with 0% coupons.
• First bond to be sold via bookbuilding at no less than 101% of par; second via competitive auction with a minimum bid of 100%.
• Horizon Securities named underwriter; bonds to be issued in book-entry form with TPEx OTC trading planned following regulatory approval.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. UMC - United Microelectronics Corporation published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-254481), on June 03, 2026, and is solely responsible for the information contained therein.