The San Francisco Bay Area now holds 91% of global generative AI private market cap, all within a one-hour radius. The Bay Area's overall share of global unicorn market cap hit 39% by December 31, 2025, up from 29% a year prior, and more than 4x any other city. The US added $1.2 trillion in unicorn market cap in a single year, bringing its global share to 65%, up from 44% in 2020. Europe surpassed China in share, but sits at just 10%.
The concentration is accelerating, not plateauing. Companies that became unicorns in 2023 or later show the US at 83% market cap share, versus 60% for the pre-2023 cohort. The Bay Area's share jumps from 33% to 63% across those same cohorts. Gen AI unicorns grew valuation by an average of $2.2 billion year-over-year, versus $0.4 billion for non-AI peers. Gen AI's share of total unicorn market cap went from 2% to 22% between 2024 and 2026. New unicorn creation collapsed: roughly 300 minted from 2022 to 2025, against more than 900 in the three years before that. Total unicorn count grew 6% year-over-year, but aggregate market cap grew 33%.
Shreyan Jain's full analysis, sourced from CB Insights data, goes deeper on city-level industry clustering: 6 of the Bay Area's top 10 unicorns are gen AI, 7 of New York's top 10 are fintech or crypto, and SpaceX, Anduril, and Relativity alone account for 83% of Los Angeles's total unicorn market cap. The data has known lags, including stale valuations for Anduril, Stripe, and SpaceX, which means the real concentration figures are likely understated. Read the full piece to see how the cohort breakdowns and city-by-city tables complicate the simple narrative of a broad AI boom.
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