Most AI companies spend years convincing investors that they’re a real business. Anthropic skipped that part. The company behind Claude AI filed a confidential S-1 with the SEC, targeting a NASDAQ listing at a staggering $965 billion valuation. Earlier this year, it had closed a $65 billion Series H. That sequencing was deliberate, and it tells us a lot about where this Anthropic IPO is headed.
This is a look into one of the largest IPOs in history. It’s a look into the revenue numbers, who the major investors are, Anthropic’s IPO Dates, and how you and I can invest. And obviously, which one to choose between OpenAI and Anthropic IPO.
Key Takeaways
- Anthropic filed a confidential S-1 with the SEC on June 1, 2026, targeting a listing in October 2026.
- Currently, the company’s valuation stands at $965 billion. That’s higher than OpenAI’s $852 billion.
- Anthropic’s annualized revenue run-rate reached $47 billion in May 2026, up from $9 billion in January 2026.
- Claude Code, the company’s agentic coding tool, is the single largest driver of that revenue growth.
- Amazon holds a paper stake worth approximately $74 billion; Google has invested $3 billion total.
- Retail investors cannot buy Anthropic stock yet. Pre-IPO access is limited to accredited investors via secondary markets like Hiive and Forge Global.
- No shares or offer price have been set. The Anthropic IPO date depends on SEC review and market conditions.
What Anthropic’s Confidential IPO Filing Actually Means
If you’ve never followed an IPO closely before, the phrase confidential S-1 may sound like you need to look it up to understand it.
Here’s what it actually means: Anthropic has submitted its draft registration paperwork to the SEC for review, but that document isn’t public yet. The SEC will review it, send feedback, and the company responds. Only after that back-and-forth is complete does the S-1 go public, and only then does the IPO clock formally start. Per SEC rules, the public S-1 must be filed at least 15 days before any roadshow begins.
So, that means no audited financials, confirmed share count, offer price, or official Anthropic stock ticker. Anthropic’s own statement confirmed all of this, noting that the number of shares and offer price have not yet been set and that timing depends on market conditions.
The only practical takeaway from here is that we know a lot about Anthropic’s business from leaks and reports. But the S-1 going public will be the first time anyone can independently verify the earnings, cost structure, and the path to profitability.
Why Anthropic filed before going public
The timing was very strategically fixed. Its Series H closed on May 28, 2026, and the S-1 landed just four days later. This is what investors call the bridge round thesis or the final private raise before going public.
Existing investors, including Amazon and Google, aren’t cashing out. They’re holding because the IPO is widely expected to price above the Series H valuation. Goldman Sachs, JPMorgan, and Morgan Stanley are already in early discussions as underwriters, with Wilson Sonsini Goodrich and Rosati serving as legal counsel (the same firm that advised Google and LinkedIn’s IPOs). That lineup signals that this isn’t a small offering. The banks don’t attach their names to deals they do not believe will price well.
Anthropic IPO Date: When Can You Actually Buy Shares?
As per a Bloomberg report, Anthropic’s targeting an October 2026 listing. An independent analyst firm, FutureSearch, places Anthropic’s median IPO date at December 20, 2026, with an 88% probability of listing before May 2027. The public S-1 filing window is expected in July or August 2026, with a roadshow starting from September.
But none of these are confirmed dates. The Anthropic IPO date is contingent on two things that Anthropic doesn’t control. First, how fast the SEC completes its review, and second, whether market conditions look favorable at the time of the roadshow.
Here are the dates we’re looking at, roughly:
- May 28 — Series H Close ($65B / $965B valuation)
- June 1 — Confidential S-1 Filed
- July–Aug — Public S-1 Filing (est.)
- September — Roadshow (est.)
- October–December 2026 — NASDAQ Listing Window
Anthropic’s Valuation: How Did It Reach $965 Billion?
The Anthropic valuation of $965 billion is the highest private valuation any AI company has ever carried. For context, OpenAI sits at $852 billion, which means Anthropic surpassed its biggest rival in private market value for the first time in late May 2026. Nvidia took 23 years to cross $1 trillion. Anthropic is approaching that number in roughly five years.
Anthropic vs. OpenAI: A quick comparison
| Metric | Anthropic | OpenAI |
| Current Valuation | $965B | $852B |
| Revenue Run-Rate (ARR) | $47B (May 2026) | ~$34B (est.) |
| ARR Multiple | ~20x | ~25x |
| IPO Filing Date | June 1, 2026 | ~May 22, 2026 |
| Target Listing Date | October 2026 | September 2026 |
| Primary Revenue Driver | Claude Code | ChatGPT / API |
| Lead Investors | Amazon, Google, Altimeter, Sequoia | Microsoft, SoftBank |
Sources: TechStackIPO, VentureBeat, Fortune
How Anthropic’s valuation grew from $4.1B to $965B in 3 Years
The growth arc here is worth sitting with for a second.
| Date | Valuation | What Drove It |
| Early 2023 | $4.1B | Early enterprise Claude adoption, Series B/C rounds |
| March 2025 | $61.5B | Claude 3 launch, surge in API enterprise demand |
| February 2026 | $380B | Series G; Claude Code commercial breakout |
| May 2026 | $965B | Series H; $47B ARR run-rate, 1,000+ enterprise customers at $1M+/year |
Sources: Forge Global, TechStackIPO
The jump from $61.5B to $380B in under a year is the one that catches most people – myself included – off guard. That move tracks almost entirely with Claude Code’s commercial launch and the resulting enterprise revenue explosion.
Anthropic Revenue: The Numbers Behind the Valuation
| Date | Annualized Revenue Run-Rate |
| January 2024 | $87M |
| January 2026 | $9B |
| April 2026 | $30B |
| May 2026 | $47B |
| Q2 2026 (projected quarterly) | $10.9B |
| 2027 (analyst median forecast) | $93B ARR |
Sources: TechStackIPO, VentureBeat, Uninvest, FutureSearch
We’re looking at a 5x acceleration in revenue in just five months, from January to May 2026 alone. CEO Dario Amodei has said the growth outstripped Anthropic’s own internal forecasts by a factor of eight. The company also expects its first operating profit in Q2 2026, which is the data point that will matter most to public market investors when the S-1 drops.
One thing worth flagging is that these are annualized run-rate figures, not GAAP revenue. The public S-1 will be the first time audited financials are available. The gap between run-rate and recognized revenue can sometimes be significant, especially for a company with large enterprise contracts.
Claude Code: The single product driving most of Anthropic’s revenue growth
Claude Code, the agentic AI coding tool Anthropic launched publicly in mid-2025, is the single product most responsible for the revenue acceleration above. Here’s what the data shows:
- Hit $1B in annualized revenue within six months of launch.
- Reached a $2.5B run-rate by February 2026.
- Enterprise customers spending over $1M annually doubled from 500 to 1,000+ in under two months as of April 2026.
- Weekly active users doubled since January 1, 2026.
- Business subscriptions quadrupled from the start of 2026.
That concentration is both the bull case and the risk. If Claude Code continues to compound, the $93B ARR forecast for 2027 is plausible. But if it slows down, the entire Anthropic revenue thesis takes a hit.
Who Are Anthropic’s Major Investors?
Investor summary table
| Investor | Total Capital Committed | Strategic Role | Approx. Paper Value |
| Amazon | Up to $25B | Primary cloud (AWS Bedrock), chip supply (Trainium) | ~$74B* |
| ~$3B | TPU supply (incl. Ironwood), cloud, Gemini competition | Undisclosed | |
| Altimeter Capital | Undisclosed | Co-led Series H | Undisclosed |
| Sequoia Capital | Undisclosed | Co-led Series H | Undisclosed |
| Spark Capital, others | Various | Earlier rounds | Various |
Paper value as of April 2026 per Fortune, marked against Series G valuation ($380B). The figure will be higher against the Series H ($965B).
The Amazon number is worth unpacking. Amazon booked $16.8 billion in pre-tax gains from its Anthropic position in Q1 2026 alone, including $12.3 billion from an upward revaluation after the Series G. Of course, these are paper gains from mark-to-market accounting, not cash returns. Amazon has not sold shares. Neither has Google.
That is an important distinction for AI investment analysis that you may may come across online – when you see headlines about Amazon or Google’s “blowout AI profits,” a meaningful (if not full) chunk of that is revaluation gains from their Anthropic stake, not from the underlying businesses.
Why Amazon and Google Are Both Investors and Infrastructure Partners
Amazon and Google are more than just financial backers, they are also Anthropic’s primary infrastructure vendors. Anthropic committed to spending over $100 billion on AWS over the next decade. AWS sells Claude through its Bedrock platform. Google supplies up to 1 million TPUs, including next-generation Ironwood accelerators.
This creates a structural situation that I find genuinely hard to characterize as purely positive or purely negative. Anthropic’s infrastructure moat, the compute access that lets it train and run frontier models at scale, is inseparable from its dependency on its two largest investors. Competitors cannot easily replicate that infrastructure access. But Anthropic also cannot walk away from these relationships without disrupting its own operations.
At IPO, public investors will be buying into that structure. The S-1 will need to disclose the full terms.
Anthropic vs. OpenAI: Which AI IPO Makes More Sense for Investors?
Both companies filed confidential S-1s within days of each other. Both are targeting late 2026 listings above $1 trillion. On paper, they look comparable. The differences matter.
Head-to-head comparison
| Metric | Anthropic | OpenAI |
| Valuation | $965B | $852B |
| ARR Multiple | ~20x | ~25x |
| IPO Filing | June 1, 2026 | ~May 22, 2026 |
| Target Listing | October 2026 | September 2026 |
| Primary Revenue Driver | Claude Code (enterprise/API) | ChatGPT (consumer + API) |
| Key Risk | Single-product concentration | Microsoft dependency, nonprofit legacy structure |
| Lead Backers | Amazon, Google | Microsoft, SoftBank |
Sources: TechStackIPO, Enterprise DNA
Anthropic leads on current valuation and trades at a lower ARR multiple, which some investors will read as relatively cheaper. OpenAI leads on consumer brand recognition and arguably has a more diversified revenue base between ChatGPT subscriptions and API. Anthropic’s revenue is more concentrated in enterprise and developer workflows.
Neither is a clearly superior investment at this stage. Both are priced for a future that has not been independently verified through audited public financials yet. The S-1 will change that calculus for both companies.
Key Risks Every Investor Should Know Before the Anthropic IPO
| # | Risk |
| 1 | Vendor lock-in: Anthropic’s $100B+ AWS commitment and reliance on Google TPUs are obvious structural dependencies on its two largest investors. |
| 2 | Revenue concentration: Claude Code clearly drives a massive share of growth. A product-level slowdown will hit Anthropic’s whole revenue thesis. |
| 3 | Valuation opacity: Is Anthropic IPO really worth $1 trillion or is it all hype? Nobody can know for sure. |
| 4 | Competitive pressure: OpenAI, Google DeepMind, Meta Llama, and xAI are all competing on capability benchmarks and pricing simultaneously. And the leaders in AI change virtually every week. |
| 5 | Positioning tension: Anthropic’s safety-first brand differentiates it in enterprise, but may slow product velocity relative to less constrained competitors. |
The third risk is the one I keep returning to. A near-trillion-dollar pre-IPO valuation is not unusual in the current AI investment cycle. But it is unusual for a company where public investors have had to rely on Bloomberg leaks and investor presentations for financial data. The $47 billion ARR figure hasn’t been audited. The public S-1 will be the first real stress test of these numbers.
How to Invest in Anthropic Before and After the IPO
Pre-IPO access to Anthropic stock is legally restricted to accredited investors under SEC rules. If you don’t qualify as an accredited investor (generally $200K+ individual income or $1M+ net worth excluding primary residence), your only legal option is to wait for the public listing. Post-IPO retail access depends on the offering proceeding as scheduled.
Pre-IPO access: Secondary markets and accredited investor platforms
Two platforms currently list Anthropic shares for accredited investors.
- Hiive: Shares are priced at approximately $1,447 per share as of June 2026, which maps to the $965B Series H valuation.
- Forge Global: Also lists Anthropic shares for accredited investors.
Three things to keep in mind before using either platform:
- The prices you’ll see are not official IPO prices and carry no guarantee of public listing.
- Pre-IPO secondary investments are speculative and illiquid. You may not be able to sell before or after the IPO.
- Accredited investor status is legally required to participate. Both platforms will verify this.
Post-IPO: What to watch on listing day and after
When the Anthropic IPO does list on NASDAQ, three specific metrics will tell you more than the opening price alone.
- Price-to-ARR multiple at debut: If Anthropic prices at $1T+ on a $47B run-rate, that is roughly 21x ARR. Compare that to how SaaS and AI infrastructure companies trade in the public market at the time of listing.
- Lock-up period structure: Amazon and Google hold significant stakes. The lock-up terms (typically 90 to 180 days post-IPO) will determine when large institutional sellers can exit. That affects post-IPO price stability.
- Sell or hold signals: Whether Amazon and Google participate in any secondary offering at IPO or hold through the lock-up will be one of the clearest confidence signals available on listing day.
The public S-1 will disclose all of this. Until then, everything is an estimate.
Final Thoughts
The Anthropic IPO can be the first real test of whether public markets will support frontier AI at private-market valuations. The S-1 going public, expected around July or August 2026, is the single event that changes the information landscape. It’ll expose audited GAAP revenue, cost structure, and the path to sustained profitability for the first time.
Exciting times!
FAQs
The target listing window is October to December 2026 on NASDAQ. No official date is confirmed; timing depends on SEC review completion and market conditions.
Anthropic’s valuation is $965 billion, set during the $65 billion Series H closed on May 28, 2026, surpassing OpenAI’s $852 billion valuation.
No. Anthropic stock is not publicly available. Pre-IPO access is restricted to accredited investors via secondary platforms like Hiive and Forge Global.
Anthropic’s annualized revenue run-rate reached $47 billion in May 2026, up from $9 billion in January 2026. Q2 2026 quarterly revenue is projected at $10.9 billion.
Anthropic trades at approximately 20x ARR vs. OpenAI’s 25x. Anthropic leads on valuation; OpenAI leads on consumer brand and product diversification.
Amazon (up to $25B committed, ~$74B paper value), Google (~$3B invested), Altimeter Capital, and Sequoia Capital, which co-led the Series H round.
