Anthropic’s S-1 filing on October 26, 2026, has anchored trader consensus around a November listing, with the AI lab targeting a roadshow the week of November 9 and a Nasdaq debut under ticker ANT in the week of November 16, ahead of Thanksgiving. Explosive revenue growth to $16.3 billion in the first half of 2026, first-quarter operating profit, and expectations of a $1.5–2 trillion valuation have reinforced momentum for the Claude developer’s debut as potentially the largest IPO on record. The filing’s detailed risk disclosures and competitive positioning against OpenAI further signal that internal preparations are complete, leaving only standard regulatory and market windows as remaining variables before the anticipated close.