The World's Largest FoundryWide moat

TSMC is the largest semiconductor foundry in the world by a commanding margin, taking 72.5% of the industry's foundry revenue in the June 2026 quarter¹, up from 67% at the end of 2024², which means its dominance is not just holding but growing. This scale is a moat in itself, distinct from the technology lead: as by far the biggest foundry, TSMC enjoys cost, investment, and relationship advantages that flow simply from being the largest, and those advantages compound over time.

Scale lets TSMC spread the enormous fixed costs of process R&D and fab construction across a revenue base no competitor approaches, giving it structurally lower costs per chip. It lets TSMC build capacity ahead of demand and serve every leading customer simultaneously, so no design wins are lost to capacity constraints elsewhere. And it makes TSMC the default partner around whom the entire ecosystem — equipment makers, materials suppliers, design-tool vendors, packaging houses — organizes itself. The largest foundry attracts the most suppliers, the most ecosystem investment, and the most customers, which reinforces its scale, which attracts still more. In a fixed-cost, capital-intensive industry, being the biggest is not a static fact but a self-reinforcing advantage, and TSMC's share is rising rather than eroding.