Anthropic is preparing to go public as soon as October 2026, according to Bloomberg and The Information, with investment banks estimating the raise could exceed $60 billion. That would make it the second-largest IPO in history, trailing only SpaceX.

This is a watershed moment for the enterprise AI market. A company that barely existed five years ago now serves eight Fortune 10 firms, has doubled its annualized revenue to $19 billion in the first two months of 2026, and is preparing to face public market scrutiny at a $380 billion valuation.

How We Got Here

Anthropic closed a $30 billion funding round in February 2026 at that $380 billion post-money valuation. For context, Alphabet (Google’s parent company) and Amazon are both major backers. Just five months earlier, in September 2025, the company’s valuation was $183 billion. It has more than doubled in under six months.

Revenue tells a similar story. The company’s annualized run rate hit $19 billion in early 2026, more than double what it was generating in late 2025. The driver: surging enterprise demand for Claude, particularly through automated programming tools and enterprise API usage.

The company has engaged Wilson Sonsini Goodrich & Rosati as lead IPO counsel and is in early conversations with Goldman Sachs, JPMorgan, and Morgan Stanley for underwriting roles. Former Airbnb IPO architect Krishna Rao has also joined the company.

The Race with OpenAI

This is not happening in a vacuum. OpenAI closed a $120 billion funding round at an $850 billion valuation earlier in March. CEO Sam Altman has privately told investors he wants OpenAI to go public before Anthropic.

The two companies are now locked in a public market race, which is notable because their business profiles are quite different. Anthropic generates $0.23 in ARR per dollar raised — double OpenAI’s ratio. Anthropic also projects positive cash flow by 2028, compared to OpenAI’s projection of positive free cash flow in 2030.

SpaceX, potentially listing as early as June, could set the tone for both. Combined, SpaceX, OpenAI, and Anthropic have private valuations exceeding $2 trillion. Blackstone president Jon Gray called 2026 the “year of the IPO” — and the AI sector is the reason why.

The Risks Are Real

This is not a clean story. A few complications businesses should understand:

The SEC is reviewing whether Anthropic can count cloud computing credits from Amazon and Google as revenue the same way it currently does. A reclassification could meaningfully change the headline revenue figures.

Model training and inference costs are enormous. Anthropic expects to spend $12 billion training models and $7 billion running them in 2026. Gross margins are improving — projected to reach around 40% this year — but the capital requirements are unlike anything traditional software businesses face.

The Pentagon dispute, which a federal judge ruled in Anthropic’s favor on March 26, also adds a layer of reputational complexity. The company is simultaneously a White House defense contractor and a company that publicly refused to allow its models to be used for mass surveillance or autonomous weapons.

Plans may also change. Anthropic itself has been careful to caveat that the timeline is not fixed, and macroeconomic conditions — particularly the current interest rate environment — could delay a listing.

What This Means for Business

If you are a business owner or technology leader, here is what this moment actually signals.

Enterprise AI is no longer speculative. A company generating $19 billion in annualized revenue from enterprise API usage and Fortune 10 contracts is a fundamentally different proposition than the hype cycle of 2023. The buyers are real, the contracts are real, and the scale is real.

The platform layer is consolidating. Anthropic’s success is partly downstream of a structural shift: enterprises are choosing AI partners, not just AI features. Claude is embedded in workflows at some of the world’s largest companies. The question for every business is not whether to use AI, but which platform your workflows will depend on.

The regulatory environment is becoming a moat. Anthropic’s willingness to draw lines around weapons and surveillance use — even at the cost of a DOD contract — has arguably strengthened its enterprise brand rather than weakened it. The court ruling in its favour reinforces that AI safety positioning can have real commercial value.

Valuation will matter post-IPO. Once Anthropic and OpenAI are public companies, the quarterly earnings calls, margin reports, and customer retention metrics will become visible. That transparency will accelerate the market’s understanding of what enterprise AI actually costs to build and what it actually delivers.

The companies that are using AI well right now — building real workflows, not running pilot programs — will be positioned to move fast when the market matures. The ones that are still in the “exploring AI” phase will find the gap widening.

Want the practical version of this? The free Working With Claude field guide covers the full Claude ecosystem, Claude Code, and how to roll it out across a real business. Download it here.