Taipei, Jan 18, 2026, 08:41 (GMT+8) — Market closed.
- UMC’s shares listed in the U.S. jumped roughly 6% Friday, closing at $9.30.
- SST, the foundry and Microchip division, announced its 28nm automotive-grade embedded flash platform is now production-ready.
- Investors are focused on UMC’s upcoming results and guidance, expected in late January.
Shares of United Microelectronics Corp listed in the U.S. closed Friday up 6% at $9.30, outperforming the more subdued broader market heading into the weekend.
The ADR climbed to the upper edge of its 52-week range, hitting $9.37 at its peak. That tight margin leaves the company little wiggle room for weak guidance when it reports to investors later this month. 1
Chip stocks fueled gains on Wall Street to close out a volatile week. U.S. markets will be closed Monday for Martin Luther King Jr. Day, so Tuesday’s session will be the first real test of whether Friday’s rally holds. 2
UMC and Silicon Storage Technology (SST), part of Microchip Technology, have wrapped up qualification and launched production of SST’s embedded SuperFlash Gen 4 on UMC’s 28HPC+ platform. The move targets automotive controllers using 28-nanometer tech. Mark Reiten, Microchip’s licensing VP, described it as “a robust 28nm AG1 solution.” Meanwhile, Steven Hsu, UMC’s technology development VP, noted growing demand for scaling SuperFlash down to 28nm. 3
Embedded non-volatile memory is simply on-chip storage that retains code and data without power. “Automotive grade 1” sets a standard for chip reliability, ensuring they function under tougher temperature conditions required by car manufacturers.
This announcement comes amid stiff competition in the chip sector. UMC produces a large share of its wafers using mature manufacturing nodes common in automotive and industrial equipment. In these markets, buyers prioritize cost, reliable supply, and thorough qualification processes just as much as sheer processing speed.
Investors are pushing the sector up, betting that AI-driven demand will keep supply tight in certain areas—though this mainly affects cutting-edge chips rather than UMC’s main processes. Jefferies analyst Blayne Curtis said this week the chip stock rally is set to last through 2026. 4
UMC faces key upcoming events soon: its 4Q 2025 earnings report and investor call are set for Jan. 28, with a January monthly sales update due on Feb. 5. 5
But the situation works both ways. If orders from automotive and industrial clients drop or inventory runs down, mature-node utilization can fall off sharply, and pricing power usually erodes faster than it builds.
Investors will focus on Jan. 28, watching for UMC’s outlook on utilization rates and demand from auto and industrial chip sectors. Key will be whether any boost in these areas is turning into actual orders or just trading activity.
