Taipei, Jan 25, 2026, 09:56 (GMT+8) — The market has closed.
- UMC’s U.S.-listed shares closed at $10.54, slipping 3.3%. Taiwan shares dropped 4.1% to finish at NT$64.80.
- UMC’s earnings report and investor call on Jan. 28 will be the next key moment for investors.
- Sentiment in chips faltered toward the end of the week, with the PHLX semiconductor index falling 1.2%.
United Microelectronics Corp’s U.S.-listed shares, represented by American depositary receipts (ADRs), dipped 3.3% on Friday to close at $10.54. The stock fluctuated between $10.26 and $10.56 during the session, with roughly 12.7 million shares traded. 1
As Taiwan and U.S. markets remain closed on Sunday, all eyes turn to UMC’s Q4 earnings report and investor call set for Jan. 28. The company’s January sales figures will follow on Feb. 5, per its investor relations calendar. 2
UMC’s Taiwan-listed shares closed Friday at NT$64.80, slipping 4.14% in Taipei. This decline could shape Monday’s open as investors watch closely for signs the stock’s recent rally is losing steam. 3
The PHLX Semiconductor Sector Total Return index slipped 1.21% on Friday, marking a modest decline that reflected a cautious tone heading into the weekend. 4
Chip traders grappled with a sudden shift in the U.S. sector after Intel’s stock plunged 14% Friday, hit by supply bottlenecks and a grim forecast. “They were all a little bit caught off guard,” Intel CFO David Zinsner told Reuters, pointing to cloud clients rushing to upgrade data-centre equipment. 5
Foundry stocks didn’t move in unison Friday. Taiwan Semiconductor Manufacturing’s U.S. shares climbed 2.29%, but GlobalFoundries dropped 4.79%. 6
UMC’s earnings call isn’t just about the top-line profit. Investors focus closely on utilisation rates — the actual running capacity of factories — to gauge if customers are ramping up orders or merely drawing down inventory.
Pricing will also be a key focus. UMC operates primarily in “mature-node” manufacturing, dealing with older chipmaking processes used in autos, industrial gear, and many common electronics. In this space, competition tends to be tougher and contracts get reset more quickly.
Comments on gross margin, plus any hints about customers pushing for discounts or faster deliveries, could influence the stock as much as the earnings report. In this space, even subtle shifts in language can send shares moving.
The setup carries risks both ways. Should UMC hint at weaker demand or fresh price pressure, the stock might face further profit-taking following a turbulent January. Even a strong quarter could fail to push shares higher if investors have already priced in positive results.
UMC’s Jan. 28 earnings report and conference call are the market’s next big events, followed by the Feb. 5 monthly sales figures. Monday’s session in Taiwan offers the initial opportunity to adjust positions before these key dates.
