United Microelectronics (NYSE: UMC) delivered a robust second-quarter performance in 2026, reporting earnings per American depositary share of $0.54, significantly exceeding the analyst consensus estimate of $0.15. The Taiwan-based semiconductor foundry also posted quarterly revenue of $2.18 billion (68.73 billion New Taiwan dollars), surpassing market expectations of $2.06 billion. This result represents a 17% year-over-year increase and a 12.6% sequential rise, driven by improving capacity utilization and margin expansion. In response to accelerating demand for artificial intelligence applications, the company’s Board approved a phased capacity expansion plan and raised its full-year 2026 capital expenditure forecast to $2 billion from the previous guidance of $1.5 billion.

The financial results highlight a marked improvement in operational efficiency. Gross margin expanded to 32.5% from 28.7% a year earlier, while operating margin increased to 21.8% from 18.4%. Capacity utilization improved to 85%, up from 79% in the prior quarter and 76% in the same period last year. These metrics indicate that United Microelectronics is successfully leveraging higher volume throughput to enhance profitability, countering earlier market concerns about soft demand in certain segments.

Financial Performance Overview

Capital expenditures for the quarter totaled $308 million. The company’s revenue mix showed shifts in process technology demand; 22nm and 28nm process technologies accounted for 37% of wafer revenue, up from 34% in the first quarter but down from 40% a year ago. Conversely, revenue from 40nm technology declined to 15% from 18% in the prior quarter.

What the Numbers Show

The divergence between revenue growth and earnings growth is the defining feature of this quarter. While top-line sales grew by 17%, earnings per share surged by 350% year-over-year. This disparity suggests that operating leverage is playing a critical role in profitability, as fixed costs are being spread over a larger base of utilized capacity. The expansion in gross margin by nearly four percentage points further supports the view that United Microelectronics is benefiting from a more favorable product mix and improved operational discipline, rather than just volume growth alone.

AI Expansion and Outlook

United Microelectronics’ Board approved a strategic expansion to meet rising AI demands. The plan includes adding cleanroom capacity at its Singapore Phase 4 facility, which will incorporate tools for silicon photonics production, and constructing a new fab shell at its Tainan campus in Taiwan to support future Phase 7 and Phase 8 fabs and advanced packaging capacity. Chairman Stan Hung noted that generative AI is driving demand for higher performance and bandwidth, while CEO Jason Wang highlighted the delivery of the company’s first mass-produced 12-inch photonic integrated circuits during the quarter.

Looking ahead to the third quarter, United Microelectronics expects wafer shipments to increase by high-single digits sequentially. The company anticipates average selling prices in U.S. dollars to remain stable, gross margin to reach the mid-30% range, and capacity utilization to remain above 90%. Demand is expected to remain stable across computer, communication, and consumer markets, with stronger demand for power management ICs, sensors, and microcontrollers supporting a recovery in the 8-inch wafer business.

United Microelectronics Corporation (UMC) is executing a dual-track capacity expansion strategy to address rising demand for artificial intelligence and edge-computing technologies. The semiconductor foundry will immediately install cleanroom capacity at its Singapore facility while simultaneously commencing construction of a new fab building shell at its Tainan campus in Taiwan. This approach aims to reduce future capacity lead times while aligning capital expenditure with secured long-term customer commitments.

The Board of Directors approved the strategy to position the company for the generative AI-driven shift in the technology landscape. Stan Hung, Chairman of UMC, stated that the rise of generative AI has accelerated demand for higher performance, bandwidth, and system integration. The phased strategy balances speed, flexibility, and capital discipline.

Expansion Details

The expansion involves distinct initiatives in Singapore and Taiwan to support different aspects of UMC’s technology roadmap.

In Singapore, UMC will invest in the cleanroom installation of the Phase 4 (P4) facility. With the building shell already constructed, the company can expand cleanroom capacity efficiently as customer demand ramps. This investment aims to strengthen Singapore as UMC’s largest site outside of Taiwan, supporting geographic diversification for supply chain resilience and advanced technology development, including silicon photonics.

In Taiwan, the new fab building will reinforce the country as UMC’s global hub for world-class manufacturing and cutting-edge R&D. The structure will house future Phase 7 (P7) and Phase 8 (P8) facilities, creating a robust foundation for UMC to scale new technologies alongside customers’ long-term product roadmaps. Chairman Hung noted that this phased strategy allows the company to maintain exceptional capital discipline by minimizing upfront depreciation while securing its position in the AI-driven future.

What the Numbers Show

The announcement highlights a strategic pivot toward capital efficiency in a high-growth sector. By separating the immediate cleanroom expansion in Singapore from the longer-term structural build-out in Tainan, UMC is attempting to decouple capacity readiness from heavy upfront depreciation costs. This approach suggests a focus on preserving cash flow while ensuring physical infrastructure is available to capture future high-growth AI applications without over-investing in idle capacity during demand ramp-up periods.