Not listed yet, no public S-1 on file, and November is only a target reported by WSJ. A full-text search of SEC EDGAR for S-1/S-1A/DRS on 9/25 found no filing by Anthropic PBC itself; WSJ on 9/18 reported a valuation of about $2 trillion and a raise of up to $100 billion.
The mainstream reads 'November listing' as a timetable; the diary reads a filing as joining the queue. The exit channel counts as open only after a listing that holds above issue price for 90 days (ENTRY 115). Kalshi on 9/25 priced 'Anthropic confirms IPO' at 57% by 12/1; that contract resolves on confirming an IPO, not on listing.
Anthropic officially announced a confidential S-1 submission on 2026-06-01. SEC EDGAR full-text search on 9/25: no S-1/S-1A/DRS from Anthropic PBC itself. WSJ 9/18 (paywalled, via secondary reports) reported the listing target moved to November, a valuation of about $2 trillion and a raise of up to $100 billion. According to a Reuters 9/4 exclusive, the public filing was pushed to late September to first land a $15 billion revolving credit facility; no signing announcement seen as of 9/25.
For founders: employees unable to sell in secondaries is a retention risk, so design a liquidity path now that does not depend on an IPO. For investors: model private-stake exits as 'queued' and watch the 90 days after the first listing; once Anthropic's S-1 is public, read the purchase-commitment notes first.