UMC priced US$1.8 billion bonds as UMC stock gains 1.23 percent

Published on 10/09/2026 at 15:22 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

September sales rose 27.22 percent year over year to NT$25.35 billion. UMC stock costs EUR 20.60 on October 9, 2026 after EUR 20.35.

Key points in brief

United Microelectronics priced US$1.8 billion of convertible bonds on October 5, 2026, with estimated dilution of 2.34 percent.
September revenue rose 27.22 percent year over year to NT$25.35 billion, while January to September revenue increased 16.08 percent.
UMC stock was trading at EUR 20.60 at Lang & Schwarz on October 9, 2026, up 1.23 percent versus EUR 20.35.

UMC, US9108734057, Illustration mit AI erstellt.

United Microelectronics Corporation (ISIN US9108734057) had priced US$1.8 billion of convertible bonds by October 5, 2026, while UMC stock was trading at EUR 20.60 at Lang & Schwarz on October 9, 2026, up 1.23 percent versus the EUR 20.35 prior close. According to StockTitan, the financing consists of two US$900 million tranches and carries an estimated dilution of 2.34 percent if fully converted.

Convertible bonds fund capacity

The bonds carry a 0 percent annual coupon and are scheduled for issuance on October 13, 2026. StockTitan reports that UMC will use the proceeds for machinery, equipment and plant-facility construction.

The financing links UMC's balance-sheet expansion to manufacturing capacity rather than an immediate earnings measure. 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, according to Yahoo Finance.

Three recent operating milestones

On June 30, 2026, UMC reported quarterly revenue of US$2.16 billion and earnings per share of US$0.53, according to MarketBeat. On October 5, 2026, the company priced the US$1.8 billion bond issue, and on October 6, 2026, it reported September revenue of NT$25.35 billion, up 27.22 percent year over year, in a release carried by Business Wire.

What dates matter next?

The bond issue is scheduled for October 13, 2026, according to StockTitan. The next earnings date is October 28, 2026, as listed by StockHub.

Stock gains 1.23 percent in trading

UMC stock was trading at EUR 20.60 at Lang & Schwarz on October 9, 2026 at 3:13 p.m. CEST, up 1.23 percent versus the Lang & Schwarz prior close of EUR 20.35 on October 8, 2026. The primary listing is on the New York Stock Exchange, where UMC is quoted in US dollars; the structured quote showed a 52-week range of USD 6.97 to USD 28.96 and market capitalization of USD 56.9 billion as of October 8, 2026. The further course of trading is shown by the continuously updated real-time quote of UMC stock.