The Anthropic IPO prospectus went public on October 26, 2026, as a Form S-1 for a Nasdaq listing under the ticker ANT, and Amendment No. 1 added third-quarter results on November 2, 2026. It revealsThe Anthropic IPO prospectus went public on October 26, 2026, as a Form S-1 for a Nasdaq listing under the ticker ANT, and Amendment No. 1 added third-quarter results on November 2, 2026. It reveals

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Anthropic IPO Prospectus Explained: What the S-1 Reveals About Revenue, Losses, Control and Risks

Author: MEXC Research Team

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Nov 6, 2026MEXC Research Team

12 min

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The Anthropic IPO prospectus went public on October 26, 2026, as a Form S-1 for a Nasdaq listing under the ticker ANT, and Amendment No. 1 added third-quarter results on November 2, 2026.

It reveals fast revenue growth and an $80.7 billion first-half loss that is mostly a non-cash accounting charge.

It also shows a share structure that leaves control with a trust and the co-founders, not public shareholders.

Key Takeaways

Anthropic filed its public S-1 on October 26, 2026, to list Class A shares on Nasdaq as ANT, and filed Amendment No. 1 (Form S-1/A) with third-quarter results on November 2, 2026.
Revenue reached $16.29 billion in the first half of 2026, up from $1.16 billion a year earlier.
Third-quarter 2026 revenue was $16.96 billion, bringing nine-month revenue to $33.24 billion, while the quarter's GAAP operating result was a $567 million loss.
About $72.4 billion of the $80.7 billion first-half net loss was a non-cash charge tied to convertible notes.
IPO buyers get one-vote Class A shares, while a trust elects most of the board and a co-founders' LLC holds 50.1% of total voting power.
The S-1 lists compute deals with Amazon, Google, Microsoft, SpaceXAI and Broadcom, several payable even if the capacity goes unused.
As of November 5, 2026, even after Amendment No. 1, the price range, share count and deal size were still blank.

Anthropic's S-1 at a Glance

Anthropic's S-1 is the first public version of its IPO paperwork, confirming where and how it will list but leaving the price for later.

Public filing date: October 26, 2026, after a confidential draft that Anthropic announced on June 1, 2026
Amendment No. 1: Form S-1/A filed November 2, 2026, adding results for the quarter ended September 30, 2026
Exchange and ticker: Nasdaq Global Select Market, ANT
Underwriters: Goldman Sachs and Morgan Stanley lead the 22 banks named on the cover
What is being sold: Class A common stock, offered by Anthropic and by existing stockholders
Still blank: the price range, share count and amount to be raised, due in a later amendment (S-1/A)

Every figure here comes from Anthropic's Form S-1 on SEC EDGAR or its Amendment No. 1 unless labeled as a media report.

What the S-1 Says About Revenue and Profit

Anthropic's S-1 shows revenue of $16.29 billion in the first half of 2026, up from $1.16 billion a year earlier, and an operating profit in the second quarter.

The rest of the snapshot, from the S-1's financial statements:

Revenue, full year 2025: $4.59 billion
Second quarter of 2026: $11.6 billion of revenue and $974 million of operating income, the first quarter with an operating profit in the filing
Operating loss, first half of 2026: $693 million, narrower than $2.14 billion a year earlier
Operating cash flow, first half of 2026: positive $3.9 billion
Cash and short-term investments, June 30, 2026: $131.7 billion, after raising $141.1 billion in total
Large customers, September 30, 2026: more than 1,900 spending $1 million or more over the past 12 months, about 250 above $10 million

Amendment No. 1 (Form S-1/A), filed November 2, 2026, adds the third quarter, which ended September 30, 2026:

Revenue, third quarter of 2026: $16.96 billion, bringing revenue for the first nine months to $33.24 billion
GAAP operating loss, third quarter of 2026: $567 million, after the second quarter's $974 million operating profit
Adjusted operating income, third quarter of 2026: about $2.46 billion, on Anthropic's own non-GAAP measure
Cash and short-term investments, September 30, 2026: $131.8 billion

Why the quarter swung back to an operating loss is broken down in Anthropic's Q3 2026 results.

Margins, run-rate revenue and cash burn get the full treatment in "Is Anthropic profitable?"

Why the Net Loss Is $80.7 Billion

Most of Anthropic's $80.7 billion net loss for the first half of 2026 is an accounting charge, not cash leaving the company.

The biggest line, $72.4 billion, is the change in fair value of convertible notes and similar instruments.

Anthropic's filing traces the charge mainly to its convertible notes gaining value as the company's valuation climbed.

Anthropic raised money through notes that later turn into shares.

When its value rises, the notes are worth more, and accounting rules record that increase as a loss.

At the operating level, the first-half loss was just $693 million.

Because the charge moves with Anthropic's own valuation, the net loss can swing hard between periods, so operating figures say more about the business.

The third quarter showed the same pattern: Amendment No. 1 reports a $23.3 billion net loss, about $21.94 billion of it from fair-value changes on convertible notes and related instruments, against a GAAP operating loss of $567 million.

Who Controls Anthropic After the IPO

After the IPO, control of Anthropic sits with two special shareholders, the Long-Term Benefit Trust and a co-founders' LLC, not with Class A buyers.

The structure goes well beyond a dual-class setup: the S-1 authorizes five share classes, and IPO buyers get one-vote Class A shares.

A single Class T share lets the trust, an independent body of five trustees with no financial stake in Anthropic, elect a majority of the board.

A single Class F share, held by an LLC of the seven co-founders, carries 50.1% of total voting power, including the vote on the remaining directors.

Class N shares, held mainly by strategic partners, carry no vote but become Class A when sold to an outside buyer.

Anthropic goes into the IPO as a public benefit corporation, so it must also weigh its public benefit purpose, and the people its conduct affects, not just shareholder returns.

The Anthropic Public Benefit Fund already holds Class N shares equal to 5% of fully diluted shares as of June 30, 2026.

The board may also give the fund up to another 2% of outstanding shares each time the stock rises 50% above the prior milestone, starting at the IPO price.

Amazon and Google are each expected to own more than 5% of Anthropic's capital stock after the IPO through non-voting Class N shares, as covered in Anthropic's valuation and who owns what.

The Compute Bill: Anthropic's Multi-Year Commitments

Anthropic's compute bill runs to hundreds of billions of dollars, with contracts reaching as far as 2036.

Several must be paid even if the capacity goes unused.

The biggest deals named in the Anthropic S-1 IPO prospectus are:

Amazon: at least $110.0 billion, May 2026 to April 2036
Google: at least $114.5 billion, April 2026 to July 2033
Microsoft: at least $44.9 billion, November 2026 to May 2033
SpaceXAI: up to $120.5 billion through 2029, about $3.1 billion a month at full delivery (expected in December 2026), with either side able to exit on 90 days' notice from early 2027
Broadcom: a five-year equipment lease of about $161.2 billion, excluding interest

For scale, Anthropic spent $8.9 billion on compute and infrastructure in the first half of 2026.

The original S-1 left the grand total blank, but Amendment No. 1 puts compute and infrastructure purchase commitments and leases at about $895.4 billion as of September 30, 2026, with about $69.8 billion due within 12 months.

Key Anthropic IPO Risk Factors in the Prospectus

The Anthropic IPO risk factors in the S-1 cluster around four themes: reliance on a few cloud partners, pushback against AI, tougher regulation and the chance that AI causes serious harm.

A large share of revenue runs through a few customers and sales channels, according to the S-1's risk factor summary.

The big cloud providers, Amazon and Google among them, are investors, suppliers, customers and resellers of Claude at once.

The filing flags that overlap as a possible conflict of interest.

The filing also warns that bad press about the AI industry as a whole can stick to Anthropic, fair or not.

New rules could raise costs, restrict operations or cut demand, and regulators may even use Anthropic's own safety disclosures to justify stricter rules.

Anthropic also writes that advanced AI could pose "catastrophic or existential risks to humanity," and that its insurance may not cover the fallout from a major AI incident.

Lockup: When Insiders Can Sell

Anthropic's lockup frees insider shares in stages over about a year, not in one 180-day cliff, and some insiders can sell on day one.

Under the S-1's lockup terms, non-founder directors, officers and some employees can sell up to 10% when trading starts.

They can sell 35% more after full-year 2026 results, and the rest by the earlier of Q1 2027 results or day 180.

Certain other holders get 6% on days 27 and 48 and 7% on days 62 and 76.

More is released after full-year 2026 results, and the rest by the earlier of Q1 2027 results or day 180.

Holders of more than 0.5% of fully diluted shares are released in eight steps from day 27, with everything free by the earlier of Q3 2027 results or day 365.

The co-founders can sell up to 29% from the earlier of Q1 2027 results or day 180, and the rest from the earlier of Q3 2027 results or day 365.

Shares sold in the IPO itself are not locked up, and the lead underwriters can waive restrictions early.

What the Prospectus Doesn't Tell You Yet

As of November 5, 2026, even after Amendment No. 1, the prospectus still omits the numbers buyers care about most: the price range, the share count and the pricing date.

They will come in a later S-1/A.

Because confidential filers must go public at least 15 days before their roadshow, the earliest start is around November 10, though no date is set.

The Wall Street Journal reported on October 26 that Anthropic aims to debut as soon as the week of November 16, 2026, according to Yahoo Finance, a target Anthropic has not confirmed.

The valuation also waits for pricing.

Anthropic's last private round valued it at $965 billion in May 2026, and Yahoo Finance's live coverage noted a reported $1.5 trillion to $2 trillion range; Bloomberg reported on October 28 that investors had indicated $1.4 trillion to $1.5 trillion.

Anthropic may also set aside 15% to 20% of its IPO shares for retail investors, with JPMorgan leading that portion, according to Bloomberg on October 28, 2026.

The S-1 itself only says underwriters may allocate shares to their online brokerage customers, naming no brokers.

It also includes public offerings in Australia, Canada, Japan, Switzerland, the UK and parts of the EEA.

Each confirmed milestone is tracked in Anthropic IPO date, plans and status.

New filings and reports land first on our latest Anthropic IPO news page.

How to Follow the Anthropic IPO on MEXC

On MEXC, eligible users can follow the Anthropic IPO through the Pre-IPO Launchpad, a platform-based mirror credits event rather than a way to buy actual shares.

Users with Advanced KYC verification subscribe using assets on MEXC, and anyone allocated gets mirror credits that track how Anthropic shares perform after the IPO.

Credits follow the actual allocation ratio, and unallocated funds return automatically to the account they came from.

After trading closes on Anthropic's first day, MEXC settles the credits against that day's closing price.

If the listing is delayed or canceled, refunds follow the event rules.

MEXC does not subscribe to the real IPO or receive share allocations for users, and joining the event is not a securities investment.

Users in restricted regions cannot join.

Fees and other terms are set out in the Anthropic IPO subscription FAQ.

*BTN- Follow the Anthropic Pre-IPO Countdown on MEXC&BTNURL=https://www.mexc.com/events/star/Anthropic*

Anthropic IPO Prospectus FAQ

What is in Anthropic's IPO prospectus?

Anthropic's IPO prospectus, the Form S-1 filed on October 26, 2026 and updated with third-quarter results by Amendment No. 1 on November 2, covers its financial results, five-class share structure, compute commitments, risk factors and lockup terms, but leaves the price range, share count and deal size blank for a later amendment.

Where can I read Anthropic's S-1?

The full S-1, filed on October 26, 2026, and Amendment No. 1, filed on November 2, 2026, are free to read on the SEC's EDGAR database under Anthropic, PBC, and our guide on where to find Anthropic's S-1 on EDGAR shows the exact filing pages and the amendments to watch.

What ticker will Anthropic use?

Anthropic plans to list Class A shares on the Nasdaq Global Select Market as ANT, but nothing trades until the SEC declares the filing effective and the IPO prices, and our guide "Is Anthropic stock public yet?" tracks that status.

Does the S-1 include an IPO price range?

No, neither the S-1 filed on October 26, 2026 nor Amendment No. 1 filed on November 2 includes the price range, share count or deal size, so as of November 5, 2026 they are expected in a later S-1/A before the roadshow.

Is Anthropic profitable according to the S-1?

Partly, because the S-1 shows $974 million of operating income in the second quarter of 2026 and $3.9 billion of positive operating cash flow in the first half, but Amendment No. 1 shows a $567 million operating loss in the third quarter, and the $80.7 billion first-half net loss is mostly a non-cash charge.

What are the main Anthropic IPO risk factors?

The S-1's main risk factors are reliance on a few cloud partners that are also investors and customers, pushback against AI, tougher regulation and the chance that advanced AI causes serious harm.

Who controls Anthropic after the IPO?

Control stays with the Long-Term Benefit Trust, whose single Class T share elects a majority of the board, and with a co-founders' LLC, whose single Class F share carries 50.1% of total voting power, while IPO buyers get one-vote Class A shares.

Is Anthropic a public benefit corporation?

Yes, Anthropic, PBC is a public benefit corporation, so after the IPO its board must weigh its public benefit purpose alongside shareholder returns, and the Long-Term Benefit Trust elects a majority of that board.

Conclusion

The Anthropic IPO prospectus tells a two-sided story.

It shows an operating profit in the second quarter of 2026 that turned into a $567 million operating loss in the third, wrapped in huge accounting losses, giant compute contracts and a structure that keeps control away from public buyers.

The next S-1/A is the document to watch, because Amendment No. 1 added the third quarter but not the price range.

*BTN- Follow the Anthropic Pre-IPO Countdown on MEXC&BTNURL=https://www.mexc.com/events/star/Anthropic*

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