Anthropic’s confidential submission of a draft S-1 registration statement to the SEC on June 1, 2026, represents the clearest near-term catalyst for its IPO timeline, following a Series H round that closed at a $965 billion post-money valuation after raising $65 billion. This filing, which followed earlier preparations including banker discussions and legal retainers, positions the company ahead of rivals like OpenAI in the race to public markets while giving it flexibility to time the debut based on prevailing equity conditions and regulatory review. The AI sector’s elevated multiples and robust institutional demand for high-growth names have supported rapid valuation expansion from $380 billion earlier in 2026, though actual pricing will hinge on broader market sentiment, Treasury yields, and comparable tech IPO performance. Traders are watching for public S-1 disclosure and any updates on underwriter mandates as key signals ahead of a potential second-half 2026 listing.