Anthropic IPO Valuation: From $965 Billion to a Rumored $1.5 Trillion — A Complete Guide to Its Funding Rounds and Equity Structure

What is Anthropic's IPO valuation? The answer is that it hasn't been finalized: as of November 5, 2026, neither the S-1 nor Amendment No. 1 lists a price range. The last company-confirmed valuation is a $965 billion post-money valuation (May 2026 Series H), while market rumors about Anthropic's 2026 IPO plans put the valuation at around $1.5 trillion, below the $1.8 trillion to $2 trillion widely circulating in October.

Key Takeaways

• The only valuation Anthropic has ever confirmed is the $965 billion post-money valuation corresponding to the $65 billion Series H funding announced on May 28, 2026.
• The IPO valuation is a different number, and it has not been finalized: Amendment No. 1, filed on November 2, 2026, still does not list a price range, and market rumors have fallen from $1.8 trillion to $2 trillion in October to around $1.5 trillion after the amendment was filed.
• From $61.5 billion in March 2025 to $183 billion, $380 billion, and then $965 billion, Anthropic's valuation climbed steadily over roughly 14 months, with each step formally announced by the company.
• The Form S-1 filed on October 26, 2026 shows that Anthropic has raised a cumulative $141.1 billion since inception, that its credit facility was expanded to $15 billion in September 2026, and that the Anthropic Public Benefit Fund holds a 5% equity stake.
• Amazon has invested about $18 billion and Google about $20 billion; both will hold more than 5% after listing, but neither has voting rights; the size of the IPO itself has also not been determined.

What is Anthropic's current valuation?

Based on the company's last announced valuation, Anthropic is worth $965 billion, the figure set when its Series H funding closed on May 28, 2026.

That round raised $65 billion, led by Altimeter, Dragoneer, Greenoaks, and Sequoia, and the company simultaneously announced that annualized revenue had surpassed $47 billion.

Neither the S-1 nor the Amendment No. 1 filed on November 2, 2026 puts forward a new valuation, because a registration statement records how much investors have already paid, not how much the next buyer is willing to pay.

What the S-1 adds is the scale behind that number: revenue of $16.29 billion in the first half of 2026, operating income of $974 million in the second quarter, and cash and short-term investments of $131.7 billion as of June 30, 2026.

Amendment No. 1 adds third-quarter data: revenue of $16.96 billion, a swing to a GAAP operating loss of $567 million after second-quarter profitability, and cash and short-term investments of $131.8 billion as of September 30, 2026; for a detailed breakdown, see the Anthropic Q3 2026 results.

When the roadshow begins, IPO investors will be pricing these numbers, not the headline valuation.

2026 Anthropic IPO Valuation: How $965 Billion Became a $1.5 Trillion Rumor

Anthropic's valuation went from $965 billion to the rumored IPO figure of about $1.5 trillion in three steps: the private round set the floor, the filing disclosed the balance sheet, and pricing will ultimately determine the public-market number.

The private floor is the $965 billion Series H, a price negotiated on a single day in May for newly issued preferred stock.

The balance sheet supporting that number includes: cumulative fundraising of $141.1 billion since inception, according to the S-1; cash and short-term investments of $131.8 billion as of September 30, 2026, according to Amendment No. 1; and a revolving credit facility that was expanded to $15 billion in September 2026, maturing on September 4, 2031.

What is still missing is the public-market number: Yahoo Finance, reporting on the S-1 filing, noted that the valuation range under discussion was $1.5 trillion to $2 trillion.

The Motley Fool reported on October 29 that more recent estimates had gradually moved toward the low end of that range.

According to reports, potential investors in October considered $1.8 trillion to $2 trillion a reasonable valuation.

After the S-1 was filed, Bloomberg reported on October 28 that investors had indicated a valuation of $1.4 trillion to $1.5 trillion, possibly as high as $1.75 trillion; Reuters reported a similar figure of about $1.5 trillion.

The November 2 Amendment No. 1 did not include a price range, so the roughly $1.5 trillion remains only a market rumor, not a number in the filing.

All of the above are media reports, not company statements; the IPO valuation will ultimately equal the final offer price multiplied by the post-offering share count.

The size of the IPO (that is, the number of shares sold and the capital raised) is likewise undetermined: the share count fields in both the S-1 and Amendment No. 1 are still blank, and the $1 billion in the S-1 fee table is merely a placeholder used to calculate registration fees, not the actual offering size.

Reuters reported in September that Anthropic was in talks with Nvidia for Nvidia to serve as a cornerstone investor in the offering, investing up to $10 billion (republished by The Star), but the S-1 summary does not list any cornerstone investors, so this remains only a report.

Traders have already begun pricing the public-market number: on November 5, 2026, Polymarket's "Anthropic IPO Closing Market Cap (Middle Brackets)" market put the probability of a first-day closing market cap of $1.8 trillion or more at 53%, $1.5 trillion to $1.8 trillion at 27%, and $1.2 trillion to $1.5 trillion at 18%; this is a market expectation with real money wagered on it, not information disclosed by the company.

For how these brackets settle and the probability of a listing date, see the guide to the Polymarket first-day closing market cap market.

How a price range translates into an IPO valuation

An IPO valuation is really a calculation of two numbers, both of which must wait for a later S-1 amendment: the price range and the post-offering share count.

Multiplying the midpoint of the price range by the post-offering share count gives the implied valuation that media headlines will cite during the roadshow.

During the roadshow, the price range may be raised or lowered based on demand; underwriters finalize the offer price the night before listing, and the IPO valuation is set at that point.

The first-day closing market cap is a third number: the closing price multiplied by the same share count, which is exactly what the prediction-market brackets are betting on.

All of these numbers may differ from the rumored figure of about $1.5 trillion, and as of November 5, 2026, none of them yet exists.

From Anthropic's private funding rounds to the rumored IPO valuation range; the final step will only be determined at pricing.

How did Anthropic's valuation climb round by round?

Anthropic's valuation has gone through five publicly announced funding rounds, rising from an undisclosed figure in 2023 to $965 billion in 2026, with each of the last three rounds at least double the previous one.

• Series C, May 2023: Raised $450 million, valuation undisclosed, led by Spark Capital.
• Series E, March 2025: Raised $3.5 billion at a $61.5 billion post-money valuation, led by Lightspeed Venture Partners.
• Series F, September 2, 2025: Raised $13 billion at a $183 billion valuation, led by ICONIQ; see the Series F announcement.
• Series G, February 12, 2026: Raised $30 billion at a $380 billion valuation, led by GIC and Coatue; see the Series G announcement.
• Series H, May 28, 2026: Raised $65 billion at a $965 billion valuation, led by Altimeter, Dragoneer, Greenoaks, and Sequoia.

The list above covers only the funding rounds for which Anthropic disclosed a valuation; Amazon's and Google's convertible notes and preferred stock subscriptions are not included and are described in the ownership section below.

Over the same period, the company's reported annualized revenue grew from about $1 billion to more than $47 billion, which is the growth each valuation jump reflected.

All preferred stock will convert to common stock at the IPO, so the structure of these funding rounds will disappear on the day ANT begins trading.

Anthropic's post-money valuation for each priced funding round, compiled from company announcements.

How much is one share of Anthropic stock?

Anthropic currently has no official share price: neither the S-1 nor the Amendment No. 1 of November 2, 2026 provides one, and the price range will only appear in a later amendment.

The S-1 does, however, set the share-count baseline: Anthropic completed a 10-for-1 stock split of its Class A and Class N shares on September 17, 2026, so any per-share figure before that date (including the quoted per-share price of the Series H) is 10 times the corresponding figure today.

The Series H priced preferred stock, and the price paid in that round does not equal the public-market share price, because preferred stock carries rights that the Class A common stock offered in the IPO does not.

A secondary-market quote for "Anthropic stock" may refer to common stock, preferred stock, or neither, and the company's investor announcements have stated that any unapproved equity transfer is void.

The "per-share price of $71.43" that circulated after the amendment was filed is Protos's calculation: it derived an implied fair value of the common stock as of September 30, 2026 from a footnote; it is not the IPO offer price, nor is it a price range.

As of November 5, 2026, the most honest answer about the per-share price is: there is no number until the next