Tomasz Tunguz: $2.9 Trillion IPO Float Problem — SpaceX/OpenAI/Anthropic Need More Capital Than Entire US IPO Market Raised 2016-2025

Tomasz Tunguz·high signal

Tomasz Tunguz's analysis reveals the structural impossibility of standard IPO floats for the Big 3: at 15-20% float, they'd need $432-576 billion from public markets in a single window, while the entire US IPO market raised only $469 billion from 2016 to 2025. Tunguz predicts tiny 3-8% floats, which would make them ineligible for S&P 500 inclusion (requires 50% public float). When floats eventually expand, passive index funds managing $20 trillion must rebalance, creating cascading sell pressure on existing mega-caps. For SaaS companies in the IPO pipeline, this capital drain could freeze secondary listings.