AI share of US market cap
How concentrated is the market in AI companies?
41.9%−0.01%Close Oct 1, 2026
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What the AI 100 is worth as a share of the whole US stock market, private companies included.
Before Oct 2, 2026 the line is a back-test of the companies picked that day.
How this index is built →Sources: company filings, exchange prices and secondary-market trades.