Anthropic's $60B+ IPO: Everything You Need to Know About the Biggest AI Listing in History

Anthropic, the AI company behind the Claude family of models, is preparing for what could be the largest technology IPO in history. Here is a comprehensive, fact-checked breakdown of its plans, valuation trajectory, financial performance, and the key players involved, based on current reporting and company announcements.

IPO Timeline & Lead Underwriters

Anthropic confidentially filed its S-1 registration with the U.S. Securities and Exchange Commission (SEC) on June 1, 2026, and is targeting a Nasdaq listing as early as October 2026 .

Bloomberg was the first to report that Morgan Stanley and Goldman Sachs were selected as lead underwriters, with JPMorgan Chase also on the deal . The selection was confirmed by multiple outlets citing people familiar with the matter .

An unusual structural challenge: Goldman Sachs and Morgan Stanley are simultaneously leading the IPO mandates for both Anthropic and its chief rival, OpenAI . This requires separate internal teams and confidential information walls — an uncommon arrangement for the two largest AI IPOs in history.

Valuation Trajectory: From $380 Billion to Over $1 Trillion

Anthropic's valuation has experienced an unprecedented surge over the first half of 2026:

• Series G (February 2026): The company raised $30 billion at a $380 billion post-money valuation, as confirmed by CNBC and an official Anthropic announcement on February 12, 2026 .
• Secondary-Market Surge (April–July 2026): By April 2026, shares on private trading platforms like Forge Global and Caplight implied a valuation of approximately $1 trillion — a roughly 3x repricing in just 90 days . By July 2026, that figure had climbed further to $1.2 trillion, surpassing OpenAI's implied ~$908 billion on the same platforms .
• Series H (May 2026): In late May, Anthropic raised $65 billion at a $965 billion post-money valuation, led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital .

Important caveat: The secondary-market valuations (~$1 trillion–$1.2 trillion) are based on thinly traded private share transactions and derivatives on platforms like Caplight and Forge Global. They are not primary fundraising rounds and may reflect speculative demand rather than a reliable prediction of the eventual IPO price .

Revenue Run Rate: The Growth Story Behind the Numbers

Anthropic disclosed in its May 28, 2026, Series H announcement that its annualized revenue run rate crossed $47 billion in early May 2026 . The company's official X (Twitter) account confirmed this figure on June 15, 2026 .

To put this explosive growth in context:

• December 2024: ~$1 billion in annualized revenue
• End of 2025: ~$9 billion
• February 2026: ~$14 billion
• April 2026: ~$30 billion
• May 2026: $47 billion

This trajectory represents roughly $8 billion in new annualized revenue per month from February to May 2026 . It is widely described as the fastest growth in enterprise software history at this scale .

Major Backers

Based on company announcements and investor lists , Anthropic's roster of backers reads like a map of contemporary tech and finance power:

• Amazon: Largest strategic investor, with approximately $8 billion committed cumulatively . AWS also serves as Anthropic's primary training cloud.
• Microsoft & Nvidia: Each disclosed intentions to invest up to $5 billion and $10 billion respectively (CNBC, January 2026) .
• Sequoia Capital: Participated in the Series H round, breaking a decades-old taboo by investing in both Anthropic and OpenAI .
• D1 Capital Partners: Co-led the Series H round .
• Other Notable Participants (Series H): Capital Group, Coatue, GIC, ICONIQ, XN, Blackstone, Brookfield, D.E. Shaw Ventures, DST Global, Fidelity, General Catalyst, Insight Partners, Jane Street, Lightspeed Venture Partners, MGX, T. Rowe Price, Temasek, and more .

Deal Size: What $60 Billion+ Means

The offering is expected to raise more than $60 billion, which would make it one of the largest IPOs in history . For context, this would dwarf Meta's $16 billion listing in 2012 and Alibaba's $25 billion raise in 2014 .

The Bigger Picture: Can Public Markets Absorb a Near-Trillion-Dollar AI Company?

The IPO is widely described as the highest-stakes test of whether public markets can absorb a near-trillion-dollar AI company . Key structural challenges include:

• Sheer size: A >$60 billion raise would test institutional demand capacity in a way no tech IPO has before .
• Competing AI IPOs: As noted, having the same lead banks work both Anthropic's and OpenAI's IPOs simultaneously is an unusual arrangement .
• Revenue vs. valuation gap: Even at $47 billion ARR, the $965 billion+ implied valuation represents a multiple that skeptics argue may not hold under public-market scrutiny .
• Private-market froth: The gap between the last official primary round ($965 billion) and secondary-market pricing ($1.2 trillion) highlights speculative excess that could correct once the company's books are open to all investors .

On DeepSeek

Regarding the competitive landscape, the user's query referenced DeepSeek preparing a mainland China IPO filing for late 2026. The evidence collected does not support this claim, and it should be treated as unverified unless a specific source is provided.

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This article is based on reporting from Bloomberg, CNBC, Business Insider, The Information, TechTimes, and company announcements as of mid-2026. All figures are sourced and cited.