The 20 Largest Semiconductor Stocks by Market Cap

#What the Ranking Shows

This ranking covers the 20 largest semiconductor companies with a US stock exchange listing (NYSE, NASDAQ, or OTCQX) by market capitalization as of September 2026. NVIDIA leads, followed by foundry giant TSMC and Broadcom (increasingly a software company after its VMware acquisition, though its chip division remains among the world's largest).

NVIDIA's scale at a $5.6 trillion market cap is more than TSMC, Broadcom, and Micron combined. But the list shows companies across memory, manufacturing, chip equipment, and design software have also reached large valuations as AI infrastructure spending has expanded.

Micron is a striking example. Its market cap has climbed to roughly $1.1 trillion as demand for high bandwidth memory, the fast memory advanced AI processors depend on, has increased. Semiconductor exposure is no longer just a bet on companies designing processors. The AI supply chain now stretches from chip architecture and manufacturing to memory, lithography, packaging, and inspection.

#Key Things Investors Should Know

• Market cap shows where investors have assigned the most equity value across the semiconductor supply chain.

• NVIDIA's $5.6 trillion valuation shows how much market value is concentrated in AI computing.

• TSMC, ASML, and other equipment companies offer exposure to the manufacturing capacity required to produce advanced chips.

• ASML is the sole manufacturer of extreme ultraviolet (EUV) lithography machines, the equipment behind the most advanced chips. That makes one Dutch company an irreplaceable link in the global semiconductor supply chain, and helps explain its position above Intel.

• WSTS projects the memory segment alone at over $800 billion in 2026, up roughly 250% year-on-year, driven by demand for high-bandwidth memory in AI systems. That forecast helps explain why Micron, which many retail investors still associate with consumer storage, now carries a trillion-dollar valuation and sits fourth on the list.

• This ranking includes only US-listed companies. Notable exclusions include Samsung, SK Hynix, and several major Japanese and Taiwanese chipmakers with no US listing. Investors comparing this to global revenue rankings will find material differences in composition.

#AI Reshaped This Ranking

AI infrastructure spending is the single biggest force behind the current order. NVIDIA, Broadcom, Micron, AMD, Marvell, and Cerebras all derive a significant share of their valuations from AI-related demand, while ASML and the equipment makers benefit indirectly through the capacity buildout AI requires. WSTS identifies AI infrastructure, high-bandwidth memory, and accelerated computing as the industry's primary growth catalysts, with the Americas growing 112% year-on-year because that is where AI semiconductor demand is concentrated.

For a broader view of how AI spending flows beyond semiconductors, see how retail investors can tap into the AI value chain.

#What Has Changed

Intel sits at number seven. For many years Intel was the industry's most valuable chipmaker, and its position reflects how completely the market has repriced around AI and the fabless model. Micron is a trillion-dollar company. Cerebras, which went public only recently, already sits among the 20 most valuable chipmakers in the world. The ranking is a snapshot, but these contrasts show how quickly semiconductor valuations can shift.

See which of these chip stocks posted the strongest returns in the best performing semiconductor stocks of 2025.

#What Investors Can Do Next

This ranking is a starting point, not a recommendation to buy any stock. Valuations fluctuate daily, and at the bottom of the list the field is tight with several companies within a few billion dollars of the 20th spot. For deeper research, TSMC's monthly revenue reports are a leading indicator of demand across the fabless supply chain, equipment order backlogs signal future capacity buildouts, and earnings transcripts from the top five companies tend to set the analytical tone for the entire sector.