🚨 BREAKING: Anthropic Files for IPO at $965B — Safety Squad Beats OpenAI to the Starting Gun

🚨 BREAKING: Anthropic files for IPO at a $965B valuation — the safety squad beats OpenAI to the starting gun. Claude just went from safety lab to Wall Street contender in 42 days. #AILeague

Anthropic, the maker of Claude, confidentially submitted a draft S-1 registration statement to the U.S. Securities and Exchange Commission on Monday, June 1 — the first of the two AI superpowers to officially fire the IPO starter pistol. 1

The filing drops less than a week after Anthropic closed its $65 billion Series H at a $965 billion post-money valuation, co-led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. 2 Revenue run-rate just crossed $47 billion, up from $9 billion at the end of 2025. That's not a growth curve — that's a launch trajectory.

<Chart key="anthropic-revenue-growth" type="bar" xKey="period" data={[{"period":"End of 2025","Revenue Run-Rate ($B)":9},{"period":"April 2026","Revenue Run-Rate ($B)":30},{"period":"May 2026","Revenue Run-Rate ($B)":47}]} series={[{"key":"Revenue Run-Rate ($B)","label":"Revenue Run-Rate ($B)"}]} caption="Anthropic annualized revenue run-rate surge in 2026 2" />

No share count. No price range. No roadshow date yet. Anthropic said the IPO will depend on market conditions — earliest landing is fall 2026. 3

In the AILeague standings, this is Anthropic/Claude making the move OpenAI has been telegraphing for months. The traditional powerhouse has been raising capital and cleaning up legal drama — Elon Musk's lawsuit was thrown out in under two hours by a California jury on May 18. But Altman still hasn't filed. The safety squad slipped in first.

Anthropic now holds the IPO pole position. It is valued higher than OpenAI's last disclosed number ($852B post-money from OpenAI's $122B March round), carries a faster revenue growth rate, and enters the public market on a post-Series H wave that makes the narrative nearly frictionless. 2

This is a three-way IPO race now. SpaceX — which merged with xAI in February and is targeting a $1.75 trillion valuation — is aiming for a June listing. Anthropic is behind it. OpenAI is behind Anthropic. The AI League's three biggest names are all sprinting for Wall Street in the same window.

Anthropic is a public benefit corporation. A significant portion of its equity is pledged to charitable causes — a rare structure for a company at this scale. If the IPO succeeds, a wave of philanthropic capital follows. That framing matters for institutional investors who now have ESG mandates baked into every allocation decision.

The product pipeline isn't standing still either. Mythos — Anthropic's next-class model, previewed in April and kept restricted after it found thousands of high-severity software vulnerabilities — is still in a controlled rollout. 2 On the same day the S-1 hit the SEC, Bloomberg reported that Anthropic is preparing to give the EU's cybersecurity agency access to Mythos. That's regulatory trust-building at the exact moment it counts most.

The AI safety lab that turned enterprise reliability into a revenue machine is now asking public markets to price it. The safety-first brand, the $47B run-rate, and the Mythos product pipeline are the three cards on the table.

The power balance among the core six squads took a hard turn Monday. Here's where it lands:

Alphabet's $80B move — announced the same day — signals the richest state-backed squad is building infra, not listing. Google doesn't need Wall Street's money. Anthropic does, and now it's going to get it. 4

The confidential filing buys Anthropic time. The SEC reviews the draft S-1 privately — Anthropic can evaluate market conditions without public scrutiny of its financials. When it files publicly, the full S-1 will land: revenue, losses, burn rate, voting structure, and who holds the biggest stakes.

OpenAI will almost certainly file shortly after. The window is competitive. Public investors don't have infinite appetite for multiple trillion-dollar AI offerings in a single quarter — SpaceX is already testing how much the market can absorb.

The IPO season question isn't whether these companies can go public. They can. The question is whether the market can price three of the most expensive companies ever listed inside the same six-month window without one of them blinking.

Anthropic moved first. The clock is running. #AILeague