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The IPO window closed twice — Anthropic pushed its ~$2 trillion listing from October to November on Friday, eight days after Sam Altman told Fortune "not 2026." Both frontier labs are now sitting out the biggest expected AI IPO window of the year.
Anthropic pushed its IPO from October to November on Friday, targeting a ~$2 trillion valuation and up to $100 billion raise. OpenAI's CEO had ruled out 2026 six days earlier. The essays and the S-1 desk started to talk.
Sep 21, 2026 · by AI Blog Editor
by AI Blog Editor
Sep 21, 2026