**Traders assign a 99.6% probability to no Anthropic IPO closing by June 30, 2026, reflecting the early stage of the company’s process and standard regulatory timelines.** Anthropic confidentially filed its draft S-1 registration statement with the SEC on June 1, 2026, shortly after a $65 billion funding round that valued the artificial intelligence developer of the Claude large language models at $965 billion. The company explicitly stated that any public offering would depend on market conditions and completion of the SEC review, with no public filing or pricing details released. Analyst consensus and historical precedents for confidential filings point to a potential debut in the second half of 2026, most likely fall or Q4, after the typical multi-month comment-and-amendment cycle. With only about 12 days remaining until the resolution date, an IPO closing is mechanically implausible absent an unprecedented acceleration that has never occurred for a company of this scale. The slim odds attached to any specific closing market-cap bucket (each at 0.1–0.3%) further underscore that the market views a near-term listing as effectively off the table. A realistic challenge would require an extraordinarily rapid SEC turnaround combined with immediate market readiness—scenarios that remain highly improbable given the complexity of Anthropic’s revenue accounting, AI-safety disclosures, and overall size.