AI IPOs over $5T may exceed 45 years of tech IPOs, tied to Big Tech books

FinanceYF5 · x · 2026-09-26

A thread by @FinanceYF5, based on a Sage Road Research report, maps how AI IPOs are entangled with Big Tech finances:

Scale: Anthropic's expected $2T IPO valuation, SpaceX at $2T post-listing, and OpenAI raising at $1.2T add up to over $5T — more than the $4.1T combined initial valuation of all 3,365 tech IPOs from 1980-2025.
Users vs. profit: OpenAI claims 1B+ active users and 2M business customers; Anthropic has 300K+ enterprise customers. Yet rising compute costs and falling token prices mean user growth may not translate into profit.
Cloud exposure: OpenAI + Anthropic will contribute 13% of AWS and 27% of Google Cloud revenue this year; OpenAI alone accounts for 70% of Microsoft's AI revenue ($24.1B of an expected $34B total).
Paper gains: In Q2, Amazon, Alphabet, Nvidia, Meta and Microsoft collectively reported $160B in "other income" (vs. $69B in Q1), much of it from rising private valuations of OpenAI/Anthropic.
Risk: Weak AI IPOs would ripple through cloud revenue, chip orders, valuations and Big Tech profits; the key metric is whether revenue growth can keep pace with spending.

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