New York, Jan 18, 2026, 19:56 EST — Market closed.
- UMC’s U.S.-listed shares ended Friday at $9.30, marking a 6.0% gain.
- U.S. equity markets remain closed Monday; trading picks up again Tuesday.
- UMC will release its fourth-quarter earnings on Jan. 28.
United Microelectronics’ shares on the U.S. exchange closed Friday at $9.30, gaining 6.04% after reaching an intraday peak of $9.37 — marking a fresh 52-week high for the ADR. Trading volume hit approximately 14.27 million shares. 1
The Taiwan-based contract chipmaker stays in focus for traders as the U.S. heads into a holiday-shortened week. The next major event on the calendar: fourth-quarter earnings, arriving in under two weeks.
This matters since the stock now trades near the upper limit of its one-year range, leaving little room for error on guidance or margins. Even a small miss can hurt when the market’s already crowded.
U.S. markets will be shut on Monday in observance of Martin Luther King Jr. Day, with trading resuming Tuesday. 2
On Friday, UMC and Microchip’s Silicon Storage Technology announced they’ve finished qualifying and released an automotive-grade embedded flash memory platform using UMC’s 28HPC+ process. Mark Reiten, Microchip’s VP, said the 28nm solution is “ready for the production of customer designs.” Steven Hsu, UMC’s tech development VP, added the launch allows customers to leverage UMC’s “models and IP” as they scale their designs. 3
UMC operates as a “foundry,” producing chips for other firms instead of marketing its own branded processors. The company specializes in mature and specialty manufacturing nodes—older, yet still high-demand technologies commonly used in automotive, industrial equipment, and connectivity chips.
That niche offers a cushion when demand for cutting-edge chips dips, but it also forces UMC to compete fiercely on price and factory utilisation. Those two points in the earnings report can swing the stock sharply.
UMC’s investor relations calendar pins the fourth-quarter 2025 earnings release and conference call on Jan. 28. The company plans to announce monthly sales figures on Feb. 5. 4
Still, the situation works both ways. Should management express caution about orders in autos or industrial sectors—or signal increased price pressure in mature nodes—the stock’s climb to a 52-week high could reverse just as fast.
Next up: U.S. markets reopen Tuesday after the holiday. Then, eyes turn to the Jan. 28 results and call for fresh details on demand, pricing, and capacity utilisation.
