# Anthropic S-1 Filing: What the Claude Maker’s IPO Papers Reveal

URL: https://whatisagenticai.net/blog/anthropic-s1-filing/
Published: 2026-10-26
Publisher: Little Tough LLC, maker of AI Agent Assistant: Agentic AI (https://apps.apple.com/us/app/ai-agent-assistant-agentic-ai/id6761501260)

The Anthropic S-1 filing went public on October 26, 2026. Ticker ANT on Nasdaq, $16.3B in half-year revenue, an $80.7B net loss, and who really controls Claude.

The Anthropic S-1 filing is public. On October 26, 2026, the company behind Claude posted its IPO paperwork on the SEC’s EDGAR site, and "anthropic s1" became one of the most searched phrases in the US within hours.

An S-1 is long, dense and written by lawyers. This page pulls out the parts most people are actually looking for: where it will trade, how much money Claude makes, why the loss number looks so scary, and the unusual rules about who controls the company.

**TL;DR:** Anthropic, PBC publicly filed its Form S-1 on October 26, 2026, and applied to list Class A shares on the Nasdaq Global Select Market under the ticker **ANT**. The filing shows $16.3 billion in revenue for the first half of 2026, up from $1.2 billion a year earlier, and an $80.7 billion net loss, of which $72.4 billion came from accounting changes in the value of convertible notes and similar instruments. No share price, share count or listing date is set yet.

## What is the Anthropic S-1 filing?

Form S-1 is the registration document a US company must file with the Securities and Exchange Commission before it sells shares to the public for the first time. It explains the business, the finances, the risks and who owns what.

Anthropic first submitted a confidential draft earlier in 2026. The version filed on October 26 is the public one, which is why the numbers are now in the news. The cover page calls it a preliminary prospectus: it "is not complete and may be changed," and the price range is still blank.

## Anthropic IPO: ticker, exchange and banks

| Item | What the S-1 says |
| --- | --- |
| Company name | Anthropic, PBC (a Delaware public benefit corporation) |
| Filed publicly | October 26, 2026 |
| Exchange | Nasdaq Global Select Market (applied) |
| Ticker | ANT |
| Shares offered | Class A common stock, sold by Anthropic and some existing holders |
| Price range | Not set yet ("between $ and $") |
| Lead banks listed first | Goldman Sachs, Morgan Stanley, J.P. Morgan |
| Listing date | Not announced; sales start after the SEC declares the filing effective |

Note the ticker. Yahoo Finance shows Anthropic’s private-market quote as ANTH.PVT, but the planned public symbol in the filing is ANT.

## How much money does Anthropic make?

A lot more than a year ago. The S-1 gives these revenue figures:

| Period | Revenue | Net loss |
| --- | --- | --- |
| 2023 | $41 million | $1.5 billion |
| 2024 | $386 million | $8.3 billion |
| 2025 | $4.6 billion | $42.0 billion |
| First half of 2025 | $1.2 billion | not used here |
| First half of 2026 | $16.3 billion | $80.7 billion |

About 80% of first-half 2026 revenue ($13.1 billion) was consumption-based, meaning businesses and developers paying for how much they use Claude through the API. The other 20% ($3.2 billion) came from subscriptions, such as Claude Pro and Max plans. The filing also says the number of customers paying $100,000 or more a year grew from more than 950 to more than 11,900 between September 2025 and September 2026.

Anthropic is careful to add that it does "not expect" revenue to keep growing at these rates.

## Why is the Anthropic net loss $80.7 billion?

This is the number in most headlines, and it needs context. Of the $80.7 billion first-half loss, $72.4 billion came from changes in the fair value of convertible notes, derivative liabilities and SAFEs. In plain words: Anthropic raised money through investment contracts that turn into shares later, and as the company’s value rose, accounting rules made it book those contracts as much bigger costs. That is not cash leaving the bank.

The operating loss, which is closer to the cost of actually running the business, was $693 million for the first half of 2026, down from $2.1 billion a year earlier. Using its own adjusted measure, Anthropic reports $2.2 billion of Adjusted Operating Income for the three months ended June 30, 2026. Adjusted figures are company-defined, so read them with care. The filing still warns that Anthropic "may not achieve or sustain profitability."

## Who controls Anthropic after the IPO?

Buying ANT shares will not buy much say over the company. The S-1 describes several share classes:

- **Class A:** the shares sold in the IPO, one vote each.

- **Class N:** same economics as Class A but no vote, held mainly by strategic business partners.

- **Class F:** a single share held by an LLC of the seven co-founders, including CEO Dario Amodei and President Daniela Amodei. It carries 50.1% of the total vote on general matters, with no economic rights.

- **Class T:** held by the Long-Term Benefit Trust, a group of financially independent trustees. It lets the trust elect directors who make up a majority of the board.

- **Class E:** issued to employees for voting on certain limited matters, with no economic rights.

As a public benefit corporation, Anthropic must balance shareholder returns against its stated purpose: "the responsible development and maintenance of advanced AI for the long-term benefit of humanity." The filing itself warns this multi-class setup may keep the stock out of some indexes and put off some institutional investors. We covered another piece of Anthropic’s public benefit structure in [What is the Anthropic Public Benefit Fund?](https://whatisagenticai.net/blog/what-is-anthropic-public-benefit-fund/)

## Anthropic S-1 customers: how concentrated is the revenue?

Early reports differed on this, so here is the filing’s wording. No single customer made up more than 10% of revenue in the nine months ended September 30, 2026. The top five customers together made up about 25% over that period. In the three months ended September 30, about 79% of revenue came from outside the top five, up from about 64% in the first quarter.

## What the S-1 says about AI agents

The business section is really a pitch for agents. Anthropic calls its agent products "Virtual Collaborators" and names Claude Code, its coding agent, as the clearest example of "autonomous AI work." It says Claude Cowork, launched as a research preview in January 2026, grew faster than Claude Code did at the same stage, and that in September 2026 it began merging Cowork into the main Claude app. Newer products like [Claude Duet](https://whatisagenticai.net/blog/what-is-claude-duet/) follow the same idea: AI that does tasks, not just answers questions.

## What this means for you

If you use Claude, nothing changes today. The models, apps and prices stay the same while the SEC reviews the filing. What the S-1 does show is where the money is: businesses paying for AI that finishes multi-step work. That is the core idea of [agentic AI](https://whatisagenticai.net/what-is-agentic-ai/).

You do not need an enterprise contract to work that way. **Agentic AI** puts a team of expert agents on your iPhone and iPad, running on frontier models, with no account or login. You hand off a task, like a research brief or a weekly plan, and up to four agents work on it together. This page is not investment advice, and we are not telling anyone whether to buy ANT. It is a guide to what the filing says.

## Quick answers

**When was the Anthropic S-1 filed?** The public S-1 was filed with the SEC on October 26, 2026. An earlier draft had been submitted confidentially.

**Where can I read the Anthropic S-1 filing PDF?** The official document is on SEC EDGAR under "Anthropic, PBC." It is an HTML page, not a PDF; your browser can print it to PDF. The link is in the sources below.

**What is Anthropic’s ticker symbol?** ANT, on the Nasdaq Global Select Market, if the listing is approved.

**What is the Anthropic IPO date and price?** Not set. The S-1 leaves the price range and share count blank. Those usually appear in a later amended filing before the shares start trading.

**Is Anthropic profitable?** Not on a net basis: it lost $80.7 billion in the first half of 2026, mostly from non-cash accounting changes. Its operating loss was $693 million, and it reports positive adjusted operating income for the second quarter.

**Does the IPO change Claude?** No. Claude keeps working the same way. Questions about its training data, like the [Anthropic Elvis lawsuit](https://whatisagenticai.net/blog/anthropic-elvis-lawsuit/), now also show up as risk factors investors will read.

**Sources:** [Anthropic, PBC Form S-1 (SEC EDGAR)](https://www.sec.gov/Archives/edgar/data/0002130357/000162828026067168/anthropicpbc-sx1.htm) · [Yahoo Finance](https://finance.yahoo.com/technology/article/anthropic-publicly-files-ipo-prospectus-noting-strong-revenue-growth-and-massive-spending-131807138.html) · [CNBC](https://www.cnbc.com/2026/10/26/anthropic-ipo-live-updates-ai-s-1-filing.html) · [Investing.com](https://in.investing.com/news/stock-market-news/anthropic-files-for-nasdaq-ipo-reports-807b-loss-in-first-half-432SI-5654437)