UMC prices USD 1.8 billion bonds: what it means for UMC stock

Published on 10/06/2026 at 17:27 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

The October 5, 2026 filing lists USD 1.8 billion of bonds and 2.34 percent dilution. For UMC stock this means a 0% coupon.

UMC, US9108734057, Illustration mit AI erstellt.

United Microelectronics Corporation, known by its UMC ticker (ISIN US9108734057), priced USD 1.8 billion of convertible bonds on October 5, 2026. According to StockTitan, the issue comprises two USD 900 million tranches, carries a 0% annual coupon and could dilute original shareholders equity by 2.34 percent if fully converted.

What the financing means

The bonds are scheduled for issuance on October 13, 2026, with proceeds designated for machinery, equipment and plant-facility construction. Tranche A matures on April 13, 2028, while Tranche B matures on October 13, 2031, according to the October 5, 2026 filing linked by StockTitan.

The stated conversion prices are NT$202.06 and NT$179.19 per share, against a TWSE closing price of NT$152.50 on October 5, 2026. That structure gives UMC fresh funding for capacity while leaving investors to weigh future share creation against the companys expansion plans.

Revenue adds operating support

UMC reported September 2026 revenue of TWD 25.35 billion, up 27.22 percent from TWD 19.93 billion in September 2025. January through September 2026 revenue reached TWD 204.01 billion, 16.08 percent above the TWD 175.74 billion reported for the same period of 2025, according to Business Wire.

The latest quarterly comparison points in the same direction. Second-quarter 2026 revenue was TWD 68.73 billion, up 17.00 percent year over year, while gross margin was 32.50 percent, as Business Wire reported.

Next result date is October 28

StockHub lists October 28, 2026 as UMCs next earnings date. The date gives investors a scheduled checkpoint for judging whether the September growth rate and second-quarter margin can support the capital expansion program.

UMC had a market capitalization of USD 58.0 billion on October 6, 2026, while its NYSE-listed shares had a 52-week range of USD 6.97 to USD 28.96. The company is a technology-sector semiconductor foundry with operations serving communications, consumer electronics and computing markets.