Anthropic Files for a $965 Billion IPO — And OpenAI Just Got Scared

Imagine you’re in a race. You’ve been leading for years. Everyone knows your name. Then your rival, who’s been training in secret, sprints past you in the final lap and waves from the finish line. That’s what Anthropic did on June 1, 2026, when it submitted a confidential S-1 filing with the SEC — a move that stunned the AI world and left OpenAI playing the longest catch-up in tech history.

Here’s the quick breakdown.

What Happened?

Anthropic, the company behind Claude, announced it confidentially submitted a draft registration statement (Form S-1) to the U.S. Securities and Exchange Commission for a proposed initial public offering. The company, just five years old, now carries a $965 billion valuation — the result of a $65 billion private funding round announced the previous week.

That’s not a typo. Nine hundred and sixty-five billion dollars.

Claude’s maker has vaulted ahead of its chief rival, ChatGPT maker OpenAI, in three critical areas: market value, reported revenue, and now — the path to becoming a publicly traded company. A heavy iron anchor lifting from dark water, pulling a taut

The Numbers That Matter

Let’s talk dollars:

Annualized revenue: $47 billion — from people and organizations using Claude to write code, do research, and automate work
$65 billion in new private funding, the largest single fundraising round in history
$965 billion valuation — making Anthropic one of the most valuable private companies ever, and now preparing for Wall Street
Five years old — founded in 2021 by ex-OpenAI leaders

For comparison, OpenAI last reported in March it was heading toward an $852 billion valuation after a $122 billion round. But Anthropic filed first.

Why This Is a Big Deal

Patrick Corrigan, a law professor at Notre Dame University who studies IPOs, put it bluntly: “We were all expecting OpenAI to go first, so it was a little bit surprising.” A thick, slow-moving river of polished bronze filling a narr

This isn’t just about being first. It’s about what being first unlocks. Public companies face quarterly earnings reports, technology disclosures, and investor scrutiny that private companies don’t. For an industry that’s been maturing “in a very short period,” as IDC analyst Tim Law put it, that transparency could be both a gift and a gut punch.

Wedbush Securities analyst Dan Ives described it as “an opening of the floodgates for the IPO market, which has been relatively dormant for a few years, with these three major conglomerates set to go public later this year.”

The three he’s referring to: Anthropic, OpenAI, and SpaceX (which merged with xAI in February and is now valued at $1.25 trillion).

The Bubble Question

Any time a five-year-old company hits a $965 billion valuation, the bubble question pops up. And it’s a fair one. All three of these companies — Anthropic, OpenAI, and SpaceX — have been losing more money than they make, fueling legitimate concerns about an AI investment bubble. A towering, unlit stone monolith casting a long shadow that

But there’s a difference between hype and revenue. $47 billion in annualized revenue from a product that barely existed three years ago isn’t speculative. It’s real money from real customers who are paying for something they find valuable.

IDC’s Tim Law, who rode the dot-com IPO wave while working for internet company VerticalNet, noted: “There are some skeptics around demand. I thoroughly believe the demand is there and will grow. I think this funding round may be the thing that enables us to complete the final sprint toward AGI.”

What This Means for You

You probably don’t have Claude stock in your portfolio yet. Public shares won’t exist until the SEC completes its review and the IPO actually prices — which could take months. But the ripple effects are already visible:

More competition, faster. OpenAI can’t stay quiet forever. The race for public markets forces pace.
More transparency, less magic. Public companies must disclose technology investments and financials. The black box of AI development is about to get a little less black.
More infrastructure spend. $965 billion means massive GPU farms, data centers, and talent wars. The companies supplying that infrastructure are the real winners.

Quick Quiz

Q1: What valuation did Anthropic reach with its latest private funding round? A: $965 billion.

Q2: How many years old is Anthropic, and what product made it famous? A: Five years old (founded 2021). Claude.

Q3: Why is Anthropic filing first, and why does that matter? A: It filed a confidential S-1 with the SEC before OpenAI did, giving it a first-mover advantage. Public investors will compare the two AI giants side-by-side, and the company that goes first sets the benchmark.