The question circulating every investment committee this weekend is not whether Anthropic can justify $2 trillion. It is what happens to the rest of the private AI complex if it cannot.
Why Wall Street Cares Now
OpenAI will not go public in 2026, CEO Sam Altman confirmed in a Fortune interview published Saturday, citing safety concerns over artificial intelligence. When asked whether an IPO would shift to 2027, Altman did not commit to a timeline but was direct: “I would say not 2026,” adding that the company has significant work ahead on safety and alignment and on how governments and industry can work together. That settles any residual ambiguity. OpenAI, the most anticipated listing in the market, is off the table for at least twelve months. The field is now Anthropic’s alone.
The Bull Case
Anthropic investors expect the AI company to go public in October at a valuation of $2 trillion or more, which would make it the largest initial public offering in history, according to the Financial Times. Anthropic is working with Morgan Stanley, Goldman Sachs and JPMorgan on a stock market listing that could launch as soon as October 2026. The revenue trajectory backs the ambition. Half a dozen of Anthropic’s backers said the company’s annualized revenue is expected to land somewhere between $100 billion and $120 billion before the year closes, a figure that would represent growth of more than tenfold compared with the $47 billion annualized revenue the company reported in May.
Bulls also point to competitive positioning. In terms of business AI adoption, Anthropic surpassed OpenAI for the first time in April 2026, based on Ramp’s AI Index and as reported by Axios, ending OpenAI’s lead in that measure. With OpenAI now explicitly out of the public-market conversation for 2026, there is no competing data point to undercut Anthropic’s pricing power on the roadshow.
The Bear Case
The numbers investors are underwriting are not Anthropic’s numbers. The diligence question is the gap between a $47 billion May run rate and the $100 billion to $120 billion December figure investors are underwriting: roughly a 2 to 2.5 times jump in seven months, and it is an investor projection, not Anthropic’s own guidance. The IPO process will force public disclosure, and the gap between investor assumption and audited reality is the central risk.
The SpaceX comparison is instructive and not entirely flattering. Reuters reported that SpaceX priced its June 2026 IPO at $135 a share and raised $75 billion, before its stock climbed enough in first-day trading to put its market capitalization near $2.1 trillion. A $2 trillion Anthropic listing would sit right at or above that opening level, meaning the record for largest tech IPO could change hands twice in the same year. But SpaceX’s market capitalization then fell more than 30% from its post-IPO peak within weeks, as reported by Quartz. If Anthropic follows a similar pattern, the headline $2 trillion price and the valuation that holds a quarter later could be two different numbers.
The Evidence
The reported $2 trillion target would represent a substantial step up from Anthropic’s latest disclosed private-financing benchmark. Following a $65 billion Series H funding round in May 2026, the company was valued at $965 billion. On those figures, a $2 trillion IPO valuation would be more than double the May private valuation. That step-up is not irrational if the revenue trajectory holds. It becomes very hard to defend if the S-1, once public, reveals that the $100 billion annualized figure is a projection built on enterprise contracts that have not yet converted.
What Investors Are Missing
The real consequence of Altman’s Saturday statement is not what it means for OpenAI shareholders. It is what it means for every fund manager, corporate treasury, and sovereign vehicle that has marked private AI holdings to anything close to current round prices. Microsoft and SoftBank face a more ambiguous outcome: both hold stakes that will be marked-to-market upon listing, and the debut may prompt outflows from investors who have used either stock as an OpenAI proxy. SoftBank, which trades more explicitly as an AI holding vehicle, faces the greater rotation risk of the two. If Anthropic prices and trades well, those marks survive. If it disappoints at $1.4 trillion instead of $2 trillion, every portfolio that carried private AI at inflated levels has a problem it can no longer defer.
Stocks to Watch
- Anthropic (pre-IPO / ANTHRO expected): The center of the debate. The S-1 disclosures, expected before the roadshow, will be the first audited look at frontier AI economics. Read those before the pricing, not after.
- SoftBank (9984.T): The most exposed public company. Its AI holding vehicle positioning makes it the clearest proxy trade heading into October, and the highest-risk one if Anthropic’s debut disappoints.
- Microsoft (MSFT): Holds stakes in both OpenAI and Anthropic with cloud commitments tied to both. An Anthropic mark-to-market is positive for the balance sheet but the bigger read-through is whether public-market pricing of frontier AI changes how Microsoft is valued as an infrastructure partner.
- Nvidia (NVDA): Nvidia provides indirect exposure to OpenAI and Anthropic because it supplies infrastructure, and it has also committed capital alongside strategic partnerships in the AI ecosystem. A strong Anthropic float validates the AI capex cycle that Nvidia’s forward estimates depend on. A weak one reopens the debate about whether GPU demand is durable or front-loaded.
