**Strong trader consensus on an Anthropic IPO closing above $1.8 trillion stems primarily from banker guidance and investor projections targeting roughly $2 trillion, fueled by the company's explosive revenue trajectory.** Anthropic's annualized run rate climbed from $47 billion in May 2026 to over $65 billion by July, with expectations exceeding $100 billion by year-end, driven by surging demand for its Claude large language models amid enterprise adoption. The May $65 billion funding round at a $965 billion post-money valuation, followed by a confidential S-1 filing in June and a leaked September prospectus highlighting rapid growth alongside heavy compute commitments, reinforced positioning ahead of rivals like OpenAI. With marketing eyed for mid-November 2026 and a Nasdaq listing potentially before Thanksgiving, the market-implied odds reflect skin-in-the-game assessment of sustained AI momentum despite elevated losses and infrastructure costs. Key near-term catalysts include the public prospectus release and final roadshow execution.