Ars Technica AIJun 5, 2026, 6:45 PMJeremy Hsu

S&P 500 Rejects SpaceX, Also Blocking OpenAI and Anthropic

Original: S&P 500 rejects SpaceX, also blocking entry for OpenAI and Anthropic

S&P will keep index eligibility rules, blocking fast S&P 500 entry for SpaceX, OpenAI, and Anthropic.

S&P Dow Jones Indices will not shorten the 12-month seasoning period for newly public companies or waive profitability and public-float requirements based on size. That blocks a fast path into the S&P 500 for SpaceX after an IPO, and would also affect OpenAI and Anthropic if they list. The decision delays potential passive-fund buying and signals that high valuations alone will not override traditional index rules.

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