Anthropic IPO with Goldman Sachs and Citigroup: AI Giant Plans Mega-IPO in 2026

Anthropic, maker of the Claude AI chatbot, has added Citigroup Inc. to its advisory team for the planned IPO, as announced on August 20, 2026. The banking consortium now comprises Morgan Stanley, Goldman Sachs Group Inc., JPMorgan Chase and Citigroup – four of Wall Street's leading houses competing for central roles in the expected mega-IPO.

The AI company is targeting an IPO as early as October 2026, according to people familiar with the matter. Anthropic had already filed its confidential prospectus with the U.S. Securities and Exchange Commission on June 1, 2026. The public version had not been released at the time of the report in July.

Banking Consortium Grew Step by Step

The composition of the advisory team occurred in multiple stages. In June 2026, Anthropic initially selected Morgan Stanley and Goldman Sachs as lead underwriters. By mid-July 2026, the consortium expanded to include JPMorgan Chase – the three institutions were set to jointly manage the order book. With the latest addition of Citigroup on August 20, 2026, the banking team now comprises four global investment banks.

This constellation illustrates the competition on Wall Street for lucrative mandates in the AI sector. The selection of multiple co-lead managers is typical for IPOs of this magnitude and distributes both the placement risk and expected fee income across multiple firms.

Up to $60 Billion in Offering Volume

The planned IPO is classified as a "mega-listing" that could achieve an offering volume of around $60 billion or more. If the IPO proceeds as planned, Anthropic would become the world's most valuable publicly traded AI company – a title that underscores the growing importance of the sector to capital markets.

For comparison, the NASDAQ Composite, which lists many technology and AI stocks, is trading at 26,067 points (–1.00 percent) on August 21, 2026. An IPO of this magnitude would have the potential to materially influence market dynamics in the AI segment.

Time Window September through October 2026

On August 11, 2026, Anthropic had communicated a time window for the IPO covering September or October 2026. Recent reports from August 21, 2026 suggest the company is targeting October. Earlier reports had also mentioned a possible final filing as early as late August 2026, indicating a swift preparation process.

Anthropic PBC develops the Claude AI chatbot, which is in direct competition with OpenAI's ChatGPT and other large language models. The company is among the most prominent providers of generative artificial intelligence and has raised substantial capital from strategic investors in recent years.

Significance for the AI Market

Anthropic's planned IPO marks a potential turning point for the publicly traded AI sector. While many leading AI firms have remained in private hands or been acquired by tech conglomerates, a mega-IPO could provide retail investors with direct access to one of the leading chatbot developers for the first time.

A valuation of $60 billion or more would also place Anthropic in a top position compared to established technology corporations. For context, the S&P 500 is trading at 7,678 points (+0.43 percent) on Friday of this week, signaling an overall robust sentiment in U.S. equity markets – an environment that can generally be conducive to IPOs.

Whether the IPO actually takes place in October 2026 depends on various factors, including market conditions, final valuation, and SEC approval. However, the expansion of the banking consortium to include Citigroup suggests that Anthropic is intensifying preparations and wants to secure placement capacity for the expected high offering volume.