Anthropic, the San Francisco AI company behind Claude, filed confidential IPO paperwork with the SEC on 1 June 2026, setting the stage for one of the most highly anticipated stock market debuts in years. Here is what UK investors need to know about the expected date, valuation, financial performance, and key risks.
Anthropic, the San Francisco AI company behind Claude, filed confidential IPO paperwork with the SEC on 1 June 2026, setting the stage for one of the most highly anticipated stock market debuts in years. Here is what UK investors need to know about the expected date, valuation, financial performance, and key risks.
Quick facts
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When is the Anthropic IPO?
Anthropic submitted a draft S-1 registration statement to the SEC on 1 June 2026 and is targeting a public listing as early as October 2026, according to Fortune. This would make it one of the first of the major AI labs to reach public markets, edging ahead of rival OpenAI, which filed its own S-1 on 22 May 2026 and is targeting a Q4 2026 window.
The confidential filing means Anthropic can advance its IPO preparations while keeping sensitive financial details private — the full prospectus will only become public approximately 15 days before the roadshow begins. No official IPO date, share price, or listing exchange has been confirmed.
What is Anthropic worth?
Anthropic raised $30 billion in a Series G round at a $380 billion valuation in February 2026, before a $65 billion Series H-1 round in May lifted its valuation to approximately $965 billion. A debut above the $1 trillion mark is now considered the base case by many investment bankers, assuming markets cooperate.
For context, SpaceX went public on 12 June 2026 and reached a market capitalisation of approximately $2.1 trillion after its first day of trading. Anthropic and OpenAI are both targeting the same $1 trillion-plus debut territory — in the same listing window.
The bull case for Anthropic
Anthropic generated $4.8 billion in Q1 2026 revenue, with Q2 2026 projected at $10.9 billion — more than doubling in a single quarter. That growth trajectory is running ahead of Zoom during the pandemic, ahead of Google before its IPO, and ahead of Facebook before its IPO.
Claude Code, the company's coding agent product, has become a major revenue contributor, reaching more than $2.5 billion in run-rate revenue by February 2026, driven by enterprise adoption in coding and agentic workflows.
On profitability, Anthropic projects $559 million in operating income for Q2 2026 — which would make it the first frontier AI lab to post a quarterly operating profit, and puts it ahead of OpenAI on the profitability timeline — a distinction that matters to investors comparing the two ahead of dual listings.
Anthropic relies primarily on chips from Google and Amazon rather than Nvidia, and has made more conservative data-centre spending commitments than rival OpenAI, which has helped contain costs. Anthropic also carries fewer free consumer users than OpenAI, reducing the subsidy burden that weighs on ChatGPT's economics.
The bear case for Anthropic
Anthropic itself has told investors explicitly that it does not expect to sustain profitability in quarters following Q2 2026, citing planned infrastructure spending. The Q2 profit figure has also attracted scrutiny: critics have argued the $559 million operating profit is inflated by a temporary ramp-up discount on Anthropic's $1.25 billion per month SpaceX compute deal once the full rate takes effect, the cost structure may not support an operating profit.
The Long-Term Benefit Trust holds special Class T shares designed to elect a majority of the board over time, meaning public shareholders may not control the board even after listing. This governance structure, combined with Anthropic's public benefit corporation status, adds complexity that public market investors may price in as a discount.
Anthropic, OpenAI, and SpaceX are all queuing for trillion-dollar listings simultaneously, which could strain institutional demand and pressure valuations if all three hit the market in a compressed window.
What happens next
Watch for the public S-1 amendment, which will be the first chance investors have to see audited financials, risk factors, ownership structure, and the terms of Anthropic's compute agreements with Amazon and Google. Major financial news outlets will cover it as soon as it becomes public.
IPO shares are typically allocated to institutional investors during the roadshow. UK retail investors will be able to buy shares at or after the first day of trading through any standard brokerage with US market access.
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