Anthropic has added Citigroup to the banking group preparing its potential IPO, alongside Morgan Stanley, Goldman Sachs and JPMorgan Chase. Morgan Stanley and Goldman Sachs are leading the underwriting effort. The Claude AI models company filed a confidential S-1 with the SEC (U.S. securities regulator) on June 1, 2026, and began investor meetings in July. Anthropic is seeking billions of dollars to expand its revolving credit facility and strengthen liquidity before going public. The company’s Series H funding round valued it at $965 billion post-money, positioning a potential Nasdaq listing as soon as October 2026 among the largest technology IPOs ever if priced near that valuation.