Anthropic Appoints Citigroup as Lead Underwriter for Massive Upcoming IPO

Artificial intelligence startup Anthropic PBC has officially added Citigroup Inc. to its roster of lead underwriters for its highly anticipated public market debut. Citigroup joins a powerful syndicate that already includes Goldman Sachs, Morgan Stanley, and JPMorgan Chase & Co. This expansion comes as the firm prepares for a projected October 2026 listing on the Nasdaq, following a confidential S-1 filing submitted to the SEC on June 1, 2026. Market experts estimate the company could reach a post-money valuation of $965 billion, a figure derived from its most recent Series H funding round.

The move to include Citigroup follows the bank’s provision of a $2.5 billion revolving credit line to the startup last year. Anthropic has demonstrated explosive financial growth, with current data indicating an annualized revenue run rate exceeding $65 billion. This performance represents a staggering sevenfold increase compared to the previous year. The rapid scaling of enterprise adoption for its foundational large language models has driven intense investor demand, necessitating a broader banking syndicate to manage the complexities of the upcoming transaction.

Financial markets are closely monitoring the underwriting lineup to gauge institutional interest in high-growth generative AI firms. Investor meetings commenced in July 2026, setting the stage for what is expected to be a landmark event for the technology sector. The offering is poised to set a new global benchmark for artificial intelligence valuations, significantly boosting investor sentiment across both hardware and software stocks. As the debut approaches, all eyes remain on the final SEC filings and the official trading date, which will dictate the immediate trajectory for AI-linked capital markets.