United Microelectronics

UMC ADR fell 6.51% to $18.53 on Thursday, fading a pre-market spike to $19.588 and sliding from the 09:33 ET high of $19.123 to $18.325 at 12:50 ET before settling near $18.53. The move came as foreign investors net sold Taiwan equities for a third straight session, the TAIEX dropped more than 800 points intraday and memory names weakened, leaving UMC lower while TSMC's ADR gained 1.6%. Company news cut the other way: UMC completed silicon-capacitor tape-out and initial validation with Epi, and is working with AP Memory on advanced power delivery for AI and HPC. Q2 EPS of $0.5295 rose 336% yoy on a 61.48% net margin, yet the shares sit below MA20 of $22.512 and MA60 of $21.244, about 36% under the 52-week high of $28.96 after a 136.35% YTD gain. At 17.51x PE and 0.83% turnover, however, volume stayed unexceptional.

UMC fell about 5.3% to $19.82 on Oct 16, fading from a pre-market high of $20.92 (04:05 ET) into a one-way regular-session slide that touched $19.745 at 15:55 ET, with after-hours trade recovering to $19.90. The driver was a broad semiconductor selloff after a hotter-than-expected US CPI print: the Philadelphia Semiconductor Index dropped 4.3%, TSMC's ADR fell another 1.8%, and UMC's weekly decline reached 12.6%. Fundamentals stand in contrast: Q2 2026 revenue rose 7.5% YoY to $2.16bn, while net profit of $1.33bn and EPS of $0.5295 both climbed roughly 336%, with ROE at 39.7%. A second straight year of shrinking 8-inch capacity has supported foundry pricing, and reported 2027 quotes point to double-digit increases. Yet the shares trade below their MA20 of $23.61 and MA60 of $21.16 and remain 31.6% under the 52-week high of $28.96, despite a 152.8% YTD gain.

United Microelectronics fell about 2.2% in regular trading to $20.92, after a pre-market slide to $20.59, as a hotter-than-expected US CPI print triggered a broad Asia-Pacific selloff and a 4.3% plunge in the Philadelphia Semiconductor Index. The stock opened at $20.40, touched an intraday low of $20.255, then rebounded to $20.965 before closing at $20.925; post-market it edged up to $20.999. Sentiment was also weighed by UMC's 4% drop on Wednesday and a 233% surge in some put options. Fundamentals offer a contrast: Q2 2026 revenue rose 7.47% YoY to $2.16bn, net profit jumped 336% to $1.328bn, and EPS reached $0.5295; shrinking 8-inch wafer capacity supports foundry price hikes, with 2027 quotes expected to rise by double digits. Still, at $20.92 the shares trade below the MA20 of $23.845 and MA60 of $21.177, about 27.8% below the 52-week high of $28.96, though up 166.84% YTD. However, the rebound from the intraday low suggests some dip-buying.

UMC fell 8.76% to $23.97 on Monday after pricing a $1.8 billion seventh overseas convertible bond, raising dilution concerns and compounding worries over delayed mass production of Vera Rubin; the stock was already down 8.15% pre-market, dipped to $23.265 at 10:21 ET, then recovered through the afternoon to close near $24. The selloff sits against strong reported fundamentals: Q2 2026 revenue of $2.157 billion rose 6.78% year over year, net profit of $1.326 billion jumped 333.31%, and net margin reached 61.48%. Year to date the shares are up 205.74% from $7.84, still 17.23% below the 52-week high of $28.96 and 243.9% above the 52-week low of $6.97; at $23.97 the price holds above the MA20 of $23.859 and MA60 of $21.161, with a PE of 22.67. One institution, GF, expects firmer prices and margins over the next two years, though potential dilution from the convertible remains a near-term overhang.

United Microelectronics (UMC.US) experienced a rally that faded in the regular session (ET 09:30-10:20), opening at $25.33 and then falling sharply to $24.48 by 10:20 ET, down about 5.0% from the prior close of $25.77. This decline was likely influenced by a series of recent executive stock sales—VP Lin Jen-Tsung sold 10,000 common shares for TWD 1.63 million on Sep 22, and CFO Chitung Liu previously sold shares worth TWD 228.8 million, fueling investor caution despite strong fundamentals. In Q2 2026, UMC posted operating revenue of $21.57 billion (+6.78% YoY), net profit of $1.33 billion (+333% YoY), EPS of $0.53, and a net profit margin of 61.48%, driven by AI-related wafer demand. From a price perspective, the current $24.47 is ~15.5% below the 52-week high of $28.96, yet up 212% YTD, and remains above its MA20 ($21.95) and MA60 ($21.23). However, pre-market trading saw a high of $25.44, indicating near-term volatility and divided sentiment.