AI 100 Accounts for 49.3% of U.S. Market Capitalization

Summary

The Inference’s AI 100 index measures the value of AI companies as a share of the entire U.S. stock market, including private companies. The index stands at 49.3% as of the close on October 2, 2026. Its chart reports an all-time increase of 94.58% and allows users to inspect historical performance across multiple time ranges.