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TSM vs. UMC: Which Semiconductor Foundry Stock Should You Bet on Now?
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Key Takeaways
TSMC is expanding advanced-node capacity as AI demand drives leading-edge chip growth.
UMC's 22nm revenues hit a record, while AI-related revenues are expected to top $1 billion in three years.
TSMC trades below its historical median P/E, while UMC trades at a premium to its median.
According to Fortune Business Insights, the global semiconductor foundry market was worth $175.1 billion in 2025 and is projected to witness a 3.4% CAGR between 2026 and 2034. The growth of artificial intelligence (AI), machine learning, 5G and the Internet of Things (IoT) is creating demand for more advanced semiconductor technologies, prompting foundries to heavily invest in research and development and develop new process nodes. Taiwan Semiconductor Manufacturing Company (TSM - Free Report) , or TSMC, and United Microelectronics Corporation (UMC - Free Report) are among the established names competing in this market.
TSMC continues to hold a commanding position, accounting for nearly 73% of the global market in the second quarter of 2026, based on insights from Counterpoint Research. The company’s revenues are heavily tied to customers serving high-performance computing (HPC), smartphones, IoT, automotive and digital consumer electronics. Meanwhile, United Microelectronics maintained a 4% market share for the fourth consecutive quarter. The company derives most of its operating revenues from manufacturing chips for communication devices, consumer electronics, PCs and other computers.
Both stocks have trailed the broader sector over the past three months, although TSMC has fared better than UMC.
Image Source: Zacks Investment Research
Here’s a closer look at where the two companies stand today.
The Case for TSMC
TSMC benefits from sustained AI and high-performance computing demand, with its leading-edge technologies driving growth. Management expects strong demand for leading-edge technologies and continued cost improvements to help offset the near-term margin impact from the steep 2-nanometer (N2) ramp-up.
The AI megatrend continues to drive demand for more computing and leading-edge silicon. TSMC said its customers and their customers, mainly cloud service providers, continue to provide a strong signal and positive outlook. The rise of Agentic AI is boosting the role of CPUs in AI data centers, adding to silicon demand beyond AI accelerators and providing another growth opportunity for the company.
At the same time, TSMC’s additional $100 billion investment in Arizona, backed by its leading U.S. customers and federal, state and local governments, will support several more fabs for N2 and below technologies and advanced packaging. The company is also adding three 3-nanometer (N3) fabs in Taiwan, Arizona and Japan while converting 5-nanometer tools to support N3 capacity in Taiwan.
Customer interest and engagement in TSMC’s A14 technology remain strong across smartphone and HPC AI applications, with tape-out activity ongoing and ahead of schedule. Pre-production will start in 2027, and volume production is scheduled for 2028. A14 could become a more significant and longer-lasting node family than N2, according to management, extending TSMC’s technology roadmap.
TSMC is also working with ASML Holding N.V. on the semiconductor industry’s transition to larger-format Extreme Ultraviolet (EUV) lithography photomasks. The move is expected to further increase fab productivity, lower chipmaking costs and remove stitching constraints, supporting the development of smaller, faster and more energy-efficient chips.
The Zacks Consensus Estimate for TSMC’s 2026 EPS currently stands at $16.56, implying a 55.5% jump over 2025. The estimate has seen an upward revision over the past 60 days.
Image Source: Zacks Investment Research
The Case for United Microelectronics
UMC’s second-quarter 2026 revenues grew 12.6% sequentially to reach TWD 68.7 billion. Revenues from its 22/28nm business continue to set records, with 22nm revenues reaching 17.5% of second-quarter sales. For the third quarter, the company expects stable demand across the computer, communications and consumer segments, with shipments projected to increase at a high-single-digit rate, driven by strong demand for power management ICs, sensors and microcontrollers. Its 8-inch portfolio is also seeing a strong rebound, with utilization expected to improve significantly.
United Microelectronics’ AI-related business is driven by the specialty semiconductor solution, supporting a broad range of applications, including power management, connectivity, FPGA, advanced packaging and silicon photonics. This business is expected to become an important contributor to growth in 2026, with current annual revenues projected to be roughly $300 million. Over the next three years, UMC expects its AI exposure to exceed $1 billion.
In late July, the company’s board of directors approved a phased expansion plan that includes expanding cleanroom capacity in Singapore and starting construction of a new fab building shell at its flagship Tainan campus in Taiwan. The dual-track plan is aimed at meeting near-term customer demand while creating the footprint needed to support future high-growth AI and edge-computing applications. As a result, the 2026 capital expenditure budget was increased to $2 billion from $1.5 billion.
The company also announced the first mass-production wafer delivery of photonic ICs from its Singapore fab, combining SILITH's silicon photonics innovation. The milestone demonstrates the company's high-volume silicon photonics manufacturing capabilities on 12-inch wafers.
The consensus mark for United Microelectronics’ 2026 EPS implies year-over-year growth of 132.1% to $1.23, with the estimate moving higher over the past 60 days.
Image Source: Zacks Investment Research
TSM & UMC: Valuation
Based on forward 12-month Price/Earnings (P/E), TSM trades at 22.51X, roughly a 7% discount to its historical median of 24.21X. UMC, meanwhile, is trading at 21.45X P/E, nearly a 23.3% premium to its median of 17.40X.
Image Source: Zacks Investment Research
Conclusion
TSMC is well positioned to benefit from sustained AI demand and the growing need for leading-edge computing power. The company is stepping up capacity investments while advancing its A14 technology. Meanwhile, UMC’s growth is being supported by record 22nm revenues, strong demand for power management ICs and a rebound in 8-inch utilization. Its AI-related business is also poised to play a larger role in growth. Both foundry players are expected to see strong earnings momentum in 2026.
Valuation also favors TSMC, which trades below its historical median P/E, while UMC trades at a premium. Supported by its recent price performance, TSM is the stronger investment choice right now.
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TSM vs. UMC: Which Semiconductor Foundry Stock Should You Bet on Now?
Key Takeaways
According to Fortune Business Insights, the global semiconductor foundry market was worth $175.1 billion in 2025 and is projected to witness a 3.4% CAGR between 2026 and 2034. The growth of artificial intelligence (AI), machine learning, 5G and the Internet of Things (IoT) is creating demand for more advanced semiconductor technologies, prompting foundries to heavily invest in research and development and develop new process nodes. Taiwan Semiconductor Manufacturing Company (TSM - Free Report) , or TSMC, and United Microelectronics Corporation (UMC - Free Report) are among the established names competing in this market.
TSMC continues to hold a commanding position, accounting for nearly 73% of the global market in the second quarter of 2026, based on insights from Counterpoint Research. The company’s revenues are heavily tied to customers serving high-performance computing (HPC), smartphones, IoT, automotive and digital consumer electronics. Meanwhile, United Microelectronics maintained a 4% market share for the fourth consecutive quarter. The company derives most of its operating revenues from manufacturing chips for communication devices, consumer electronics, PCs and other computers.
Both stocks have trailed the broader sector over the past three months, although TSMC has fared better than UMC.
Image Source: Zacks Investment Research
Here’s a closer look at where the two companies stand today.
The Case for TSMC
TSMC benefits from sustained AI and high-performance computing demand, with its leading-edge technologies driving growth. Management expects strong demand for leading-edge technologies and continued cost improvements to help offset the near-term margin impact from the steep 2-nanometer (N2) ramp-up.
The AI megatrend continues to drive demand for more computing and leading-edge silicon. TSMC said its customers and their customers, mainly cloud service providers, continue to provide a strong signal and positive outlook. The rise of Agentic AI is boosting the role of CPUs in AI data centers, adding to silicon demand beyond AI accelerators and providing another growth opportunity for the company.
At the same time, TSMC’s additional $100 billion investment in Arizona, backed by its leading U.S. customers and federal, state and local governments, will support several more fabs for N2 and below technologies and advanced packaging. The company is also adding three 3-nanometer (N3) fabs in Taiwan, Arizona and Japan while converting 5-nanometer tools to support N3 capacity in Taiwan.
Customer interest and engagement in TSMC’s A14 technology remain strong across smartphone and HPC AI applications, with tape-out activity ongoing and ahead of schedule. Pre-production will start in 2027, and volume production is scheduled for 2028. A14 could become a more significant and longer-lasting node family than N2, according to management, extending TSMC’s technology roadmap.
TSMC is also working with ASML Holding N.V. on the semiconductor industry’s transition to larger-format Extreme Ultraviolet (EUV) lithography photomasks. The move is expected to further increase fab productivity, lower chipmaking costs and remove stitching constraints, supporting the development of smaller, faster and more energy-efficient chips.
The Zacks Consensus Estimate for TSMC’s 2026 EPS currently stands at $16.56, implying a 55.5% jump over 2025. The estimate has seen an upward revision over the past 60 days.
Image Source: Zacks Investment Research
The Case for United Microelectronics
UMC’s second-quarter 2026 revenues grew 12.6% sequentially to reach TWD 68.7 billion. Revenues from its 22/28nm business continue to set records, with 22nm revenues reaching 17.5% of second-quarter sales. For the third quarter, the company expects stable demand across the computer, communications and consumer segments, with shipments projected to increase at a high-single-digit rate, driven by strong demand for power management ICs, sensors and microcontrollers. Its 8-inch portfolio is also seeing a strong rebound, with utilization expected to improve significantly.
United Microelectronics’ AI-related business is driven by the specialty semiconductor solution, supporting a broad range of applications, including power management, connectivity, FPGA, advanced packaging and silicon photonics. This business is expected to become an important contributor to growth in 2026, with current annual revenues projected to be roughly $300 million. Over the next three years, UMC expects its AI exposure to exceed $1 billion.
In late July, the company’s board of directors approved a phased expansion plan that includes expanding cleanroom capacity in Singapore and starting construction of a new fab building shell at its flagship Tainan campus in Taiwan. The dual-track plan is aimed at meeting near-term customer demand while creating the footprint needed to support future high-growth AI and edge-computing applications. As a result, the 2026 capital expenditure budget was increased to $2 billion from $1.5 billion.
The company also announced the first mass-production wafer delivery of photonic ICs from its Singapore fab, combining SILITH's silicon photonics innovation. The milestone demonstrates the company's high-volume silicon photonics manufacturing capabilities on 12-inch wafers.
The consensus mark for United Microelectronics’ 2026 EPS implies year-over-year growth of 132.1% to $1.23, with the estimate moving higher over the past 60 days.
Image Source: Zacks Investment Research
TSM & UMC: Valuation
Based on forward 12-month Price/Earnings (P/E), TSM trades at 22.51X, roughly a 7% discount to its historical median of 24.21X. UMC, meanwhile, is trading at 21.45X P/E, nearly a 23.3% premium to its median of 17.40X.
Image Source: Zacks Investment Research
Conclusion
TSMC is well positioned to benefit from sustained AI demand and the growing need for leading-edge computing power. The company is stepping up capacity investments while advancing its A14 technology. Meanwhile, UMC’s growth is being supported by record 22nm revenues, strong demand for power management ICs and a rebound in 8-inch utilization. Its AI-related business is also poised to play a larger role in growth. Both foundry players are expected to see strong earnings momentum in 2026.
Valuation also favors TSMC, which trades below its historical median P/E, while UMC trades at a premium. Supported by its recent price performance, TSM is the stronger investment choice right now.
TSM carries a Zacks Rank #2 (Buy), while UMC has a Zacks Rank #3 (Hold). You can see the complete list of today’s Zacks #1 Rank (Strong Buy) stocks here.