United Microelectronics shares climbed to a fresh 52-week peak after the company reported quarterly results that exceeded expectations. During Wednesday’s session, trading volume reached 26.9 million shares, up from the prior close of 11.33, and the stock traded as high as 12.68 before settling near 12.51. This surge reflects renewed investor confidence following stronger-than-expected profitability metrics.

In the fourth quarter, UMC generated revenue of $1.97 billion, surpassing consensus estimates by approximately $40 million and marking a 7.0% year-over-year increase. Earnings per share came in at $0.13, beating the consensus forecast of $0.12. The company delivered a net margin of 17.08% and achieved an 11.18% return on equity, underscoring efficient cost control and solid operating leverage in its mature and specialty node businesses.

UMC’s Phase 3 expansion at its Singapore Fab 12i reached completion during 2025, bolstering capacity for 22/28 nm production, which saw a 31% sequential revenue increase and now represents over 13% of wafer revenue. Concurrently, partnerships such as the 12 nm collaboration with Intel and a memorandum with Polar Semiconductor signal the foundry’s push into advanced packaging and silicon photonics, positioning it for sustained growth in AI, automotive and high-performance networking applications.

Several brokerages have adjusted their outlook on United Microelectronics, with five analysts assigning sell or underperform recommendations and consensus target prices near $8.60, reflecting cautious sentiment despite the recent rally. At the same time, institutional investors have been active: Vise Technologies initiated a $1.47 million position, Callan Family Office increased its stake by over 400%, and North of South Capital added nearly $1 million in new holdings during the recent quarters, suggesting mixed views between short-term skepticism and longer-term conviction.