The shares are nearly impossible to buy because almost no one will sell them, even as the company has yet to turn an annual profit.
The Summary
- Anthropic's secondary market valuation hit $1.5 trillion, up 25% in a month, with the company reportedly planning a $2 trillion IPO in October that would eclipse SpaceX as the largest ever
- The company was last valued at $965 billion in May and filed to go public in June, but secondary traders report extreme scarcity of sellers even at the elevated $1.5 trillion price
- Revenue has flatlined while the company burns toward a $2 trillion listing without having reported an annual profit, yet investor appetite remains insatiable
The Signal
The gap between Anthropic's official valuation and what investors will pay on secondary markets tells you everything about the agent economy's trajectory. In May, the company raised at $965 billion. Three months later, secondary traders report deals at $1.5 trillion, a 55% premium to the last funding round. That is not normal price discovery. That is desperation.
"The few sellers on our books are around $1.5 trillion," Glen Anderson, CEO of Rainmaker Securities, told Business Insider. "Even at that number, there aren't a lot of sellers out there." Think about that dynamic. Investors are bidding up shares of a money-losing company in a crowded market, and the people who own those shares are declining to sell at nosebleed valuations.
"People are trying to position themselves ahead of the IPO."
The math gets weirder when you layer in the October timeline. If Anthropic lists at the rumored $2 trillion valuation, anyone buying at $1.5 trillion today is betting on a 33% pop in two months. Not impossible, but aggressive for a company that Fortune reports has flatlined revenue growth while racing toward the largest IPO in history. The normal IPO playbook is to show hockey-stick growth right before you go public. Anthropic is showing the stick without the blade.
What makes this froth sustainable is the belief that AI foundation models are winner-take-most markets. Anthropic's Claude models are the only serious alternative to OpenAI's GPT for enterprises that want state-of-the-art reasoning and don't want to be wholly dependent on Sam Altman's judgment. That strategic positioning is worth something, maybe a lot.
But the intensifying competition from OpenAI and Chinese open-source models raises the question of how durable that moat really is. If open-source models get within 80% of Claude's performance at 5% of the cost, enterprise buyers will do the math. And if OpenAI keeps shipping, Anthropic's "we're the safe, thoughtful alternative" pitch gets harder to sustain at a $2 trillion valuation.
The IPO itself would reset the entire venture capital market. A $2 trillion debut would be larger than the market caps of Walmart, JPMorgan, and Visa. It would make every AI startup's Series B pitch easier and every late-stage investor's return expectations higher. It would also create a new class of AI millionaires who will plow capital back into the next wave of agent startups, compounding the cycle.
The Implication
If you work in AI or adjacent to it, watch what happens to Anthropic's valuation between now and October. If secondary markets keep climbing even as fundamentals stall, that tells you the IPO window is wide open and other foundation model companies will rush through it. If the valuation stalls or dips, it means investors are finally doing the unit economics and the IPO could get delayed or repriced.
For builders, the signal is clear: the money is still flowing to foundational infrastructure, not yet to the application layer. If Anthropic can command a $2 trillion valuation on flattening revenue, the market is still betting on picks and shovels. Build the agents that sit on top of Claude, not another foundation model.