SpaceX, OpenAI and Anthropic valued above all US IPOs of past 45 years

The three AI-linked companies' combined valuation reportedly exceeds the first-day market value of all U.S. tech IPOs over 45 years. SpaceX, after its June IPO, is worth nearly $2.1 trillion; OpenAI is discussing a round at about $1.2 trillion; Anthropic is reportedly targeting roughly $2 trillion for a November IPO.

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