UMC

TSMC and UMC are competing in the growing semiconductor foundry market, projected to grow at 3.4% CAGR through 2034. TSMC dominates with 73% market share and benefits from AI demand and advanced node expansion, while UMC maintains 4% share with strong 22nm revenues and emerging AI business. TSMC trades below its historical P/E median while UMC trades at a premium, making TSMC the stronger investment choice with a Zacks Rank #2 (Buy) versus UMC's Rank #3 (Hold).