Anthropic’s quiet period ends as pre-IPO shares climb past post-election levels

The Claude maker moves from regulatory silence to its marketing push while secondary-market pricing signals investor appetite Anthropic is about to start talking. The AI company behind the Claude models is wrapping up its IPO quiet period, with formal marketing set to begin the very next day. Investors in the private secondary market are not waiting for the pitch. Pre-IPO shares of Anthropic have climbed back above where they traded after the US midterm elections, a sign that demand has held up through the silent stretch. Anthropic publicly filed its S-1 registration statement with the US Securities and Exchange Commission on October 26, 2026. That document is the formal prospectus a company submits before selling shares to the public.

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