The extraordinary valuations attached to SpaceX, Anthropic and OpenAI are reaching a scale that could eclipse 45 years of U.S. technology IPOs combined, illustrating how dramatically the artificial intelligence boom has reshaped public and private markets.
SpaceX currently carries a market capitalization of roughly $2 trillion following its public-market debut earlier this year. Anthropic is meanwhile expected to seek a valuation of approximately $2 trillion when it goes public, while OpenAI is discussing new financing at a valuation of more than $1.2 trillion. Together, those figures amount to roughly $5.2 trillion.
Three Companies Versus 3,365 Tech IPOs
The comparison becomes particularly striking when placed against the history of the U.S. technology sector. Data compiled by University of Florida emeritus professor Jay Ritter shows that 3,365 technology companies went public between 1980 and 2025, carrying a combined market capitalization of approximately $4.1 trillion on their first trading day.
That means the $5.2 trillion combined value represented by SpaceX and the prospective valuations of Anthropic and OpenAI would be about $1.1 trillion higher than the debut-day value of all those technology IPOs combined.
The historical group spans generations of companies that transformed the technology industry, from the personal-computing and internet eras to cloud computing, smartphones and social media. The fact that three companies associated with the current AI investment cycle can now be compared with that entire period demonstrates the unprecedented scale of capital flowing toward frontier AI and its infrastructure.
There is, however, an important caveat. The comparison is not perfectly like-for-like: SpaceX already trades publicly, while Anthropic’s $2 trillion figure remains a prospective IPO valuation and OpenAI’s $1.2 trillion figure reflects a private financing valuation under discussion rather than an established public-market value. The historical $4.1 trillion figure also is not adjusted for inflation.
Anthropic Could Be the Next Major Test
Anthropic could provide the next major test of whether public investors are prepared to support the enormous valuations established during the AI boom. The Claude developer has been preparing for a potential listing, with investors discussing a valuation around $2 trillion.
If achieved, that would put Anthropic in the same valuation range as SpaceX and make its debut one of the largest public-market events ever.
OpenAI’s path is less immediate. The ChatGPT developer has been discussing financing at a valuation exceeding $1.2 trillion, but CEO Sam Altman has indicated that the company does not plan to complete an IPO in 2026. A public listing could therefore come in 2027 or later.
That distinction means the $5.2 trillion figure should not be interpreted as the value of three simultaneous IPOs or as the amount of capital the companies would raise. Instead, it combines SpaceX’s current public-market capitalization with valuations being discussed for Anthropic and OpenAI.
AI Is Rewriting the Scale of Public Markets
The numbers nevertheless demonstrate how rapidly the scale of technology companies has changed. Companies can now accumulate trillion-dollar valuations before, or shortly after, entering public markets, supported by enormous private funding rounds and expectations that AI will reshape large portions of the global economy.
The same valuations also create substantial expectations. Public investors will ultimately have to determine whether revenue growth, profitability and future cash flows can support prices established during an extraordinary period of AI investment.
SpaceX has already crossed that threshold into public markets. Anthropic may soon follow, while OpenAI remains further behind.
If their current and prospective valuations hold, three of the most prominent companies associated with the AI era would together represent more value than 3,365 U.S. technology companies carried at their IPO debuts over the previous 45 years — one of the clearest illustrations yet of the unprecedented financial scale of the AI boom.
