Anthropic IPO: can UK investors buy shares?
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Anthropic eyes $2 trillion IPO: what UK investors need to know
Anthropic, the AI safety company behind the Claude chatbot, is reportedly planning an IPO that could value it at up to $2 trillion, which would make it one of the largest stock market debuts in history and potentially beat SpaceX’s long-anticipated float. UK investors are already asking how to get a piece of it, but access will depend heavily on your broker, your account type, and regulatory decisions that haven’t been made yet.
What is Anthropic and why does the valuation matter?
Anthropic was founded in 2021 by former OpenAI researchers, including Dario Amodei and Daniela Amodei, after a split over the direction of AI safety research. The company has since raised billions from investors including Google and Amazon, and its Claude models now compete directly with OpenAI’s GPT-4 class products across business and developer use cases.
The $2 trillion figure is striking because it would represent one of the fastest climbs from founding to mega-cap status in tech history. For context, Anthropic was valued at around $61 billion in early 2024 following an Amazon investment round. A $2 trillion IPO would represent a valuation roughly in the same neighbourhood as Meta’s current market cap, and larger than most FTSE 100 companies combined.
Why SpaceX is the benchmark being used
SpaceX has become the informal reference point because it has long been the most anticipated private tech IPO globally. Elon Musk has repeatedly said SpaceX is not ready to go public, leaving a vacuum that every major private tech company now gets measured against. If Anthropic lists first and at this scale, it takes that symbolic crown.
The comparison also matters because SpaceX’s valuation has itself been a moving target, recently estimated above $350 billion in secondary market trades. Anthropic’s rumoured $2 trillion target would dwarf that, placing it firmly in the territory of the world’s most valuable public companies on day one of trading.
When could the IPO happen?
No confirmed date has been announced. Reports suggest Anthropic is considering a float sometime in 2025 or 2026, but IPO timelines at this scale are notoriously fluid. The company would need to file with the SEC if listing in the United States, which is the most likely primary market, and that process typically involves months of regulatory review and roadshows before shares trade publicly.
Anthropic has reportedly been in early conversations with investment banks about the process, but nothing has been formally filed as of mid-2025. Treat any specific timeline you read as speculative until SEC documentation appears.
Can UK investors buy Anthropic shares at IPO?
This is where expectations need to be managed carefully. If Anthropic lists on a US exchange such as the NASDAQ or NYSE, UK retail investors can technically access US-listed shares through many standard brokers. Platforms such as Freetrade, Trading 212, and Interactive Brokers all offer access to US equities, and most larger providers like Hargreaves Lansdown and AJ Bell do too.
However, IPO allocations at this scale are typically dominated by institutional investors: large fund managers, pension funds, and high-net-worth clients of the underwriting banks. Retail access at IPO price, before the stock starts trading on the open market, is rare and usually limited to specific brokerage relationships or platforms with direct IPO participation agreements. Most UK retail investors who want exposure will end up buying on the open market after trading begins, which means paying whatever price the stock opens at, not the IPO price.
There is also a regulatory dimension. Some high-growth, pre-profit tech IPOs trigger additional requirements around suitability for retail investors in the UK under FCA rules. This does not mean you cannot invest, but it may mean your broker requires you to confirm your experience level or qualify as a self-certified sophisticated investor before purchasing.
What about ISAs and SIPPs?
US-listed shares are generally eligible to be held in a Stocks and Shares ISA or a SIPP, meaning UK tax wrappers could apply. However, IPO allocations through retail brokers into an ISA at launch price are unlikely. The more realistic scenario is buying post-IPO through your ISA once normal trading begins, subject to your annual allowance and the rules of your specific provider.
The risks UK investors should weigh
Anthropic is not yet profitable. Like many large-scale AI companies, it is spending heavily on compute infrastructure, model training, and safety research. The $2 trillion valuation, if accurate, would price in decades of future growth at a level that leaves very little margin for disappointment. History suggests that the most hyped IPOs often underperform in the first year as early institutional sellers take profit and growth projections get stress-tested against real earnings.
That does not mean the investment case is weak, but it does mean that buying at or near IPO price carries real risk, particularly if you are a retail investor without the ability to absorb a sharp drawdown.
What this means for you
If you are a UK investor interested in Anthropic, the practical steps are to check that your existing broker offers access to US-listed shares, confirm whether your ISA or SIPP can hold them, and sign up for IPO notifications through platforms that offer early access to US floats. Beyond that, patience is the right posture. The float is not imminent, the valuation is unconfirmed, and the most reliable route for most retail investors will be buying through the open market once trading begins and the initial volatility settles.
Verdict
Anthropic’s potential IPO is one of the most consequential market events the AI sector has produced, and UK investors should be paying attention. Access at IPO price will be difficult for most people, but access to the stock once it is publicly traded is straightforward through most standard brokers. The bigger question is whether the valuation will leave any room for growth after day one.
Frequently asked questions
Will Anthropic list on the London Stock Exchange?
This is unlikely. Anthropic is a US company and would almost certainly list on a US exchange such as NASDAQ or NYSE. A dual listing in London is possible but has not been mentioned in any reports to date.
Can I buy Anthropic shares through my ISA?
US-listed shares are generally ISA-eligible through Stocks and Shares ISA accounts. However, getting shares at the IPO price through an ISA wrapper before open-market trading begins is unlikely for most retail investors. Post-IPO purchases through your ISA are the more realistic option.
What is the difference between buying at IPO price and buying after the float?
IPO price is the price set by the company and its underwriters before shares trade publicly. After the float, the price is determined by market demand. High-profile IPOs often open well above the IPO price, meaning retail investors buying on the open market pay more than institutional investors who received an allocation at the original price.
Is a $2 trillion valuation realistic for a company that is not profitable?
It is speculative. Anthropic’s valuation is based on projected future revenue and its position in the AI market, not current earnings. Investors are betting on long-term growth. Whether that multiple is justified depends on how the AI sector develops over the next decade.
Should I wait for the IPO or buy AI exposure now through an ETF?
That depends on your risk appetite and time horizon. AI-focused ETFs already provide indirect exposure to companies building and using AI infrastructure, including some of Anthropic’s largest investors like Amazon and Google. If the wait for an Anthropic float feels uncertain, a broader AI or technology ETF gives you diversified exposure now without concentrating risk on a single listing.
The Anthropic IPO story will continue to develop as 2025 and 2026 unfold, so keeping an eye on SEC filings and announcements from your broker is the most practical thing you can do in the meantime.
