SpaceX, OpenAI and Anthropic's $5.2 Trillion Combined Value Tops 45 Years of Tech IPOs

SpaceX, OpenAI and Anthropic now carry a combined valuation of roughly $5.2 trillion. That number is bigger than the total first-day market value of every single US technology company that went public between 1980 and 2025, according to data compiled by University of Florida finance professor Jay Ritter and cited by the Financial Times. All 3,365 of those IPOs, combined, topped out at about $4.1 trillion.

Economist Steve Rattner, CEO of Willett Advisors, put the comparison in a chart he posted September 21. It's been making the rounds ever since, cited by Yahoo Finance, Benzinga, TradingView and others.

The Only One That's Actually Public

SpaceX is the one company of the three that's actually trading. It priced its June IPO at $135 a share, valuing the company around $1.75 trillion, according to TradingView. Shares opened at $150 and closed the first day at $160.95, pushing the market cap to roughly $2.1 trillion.

How much cash SpaceX actually raised depends on which outlet you read. TradingView and Crypto Briefing both put the figure at about $75 billion. Yahoo Finance and AOL report $85.7 billion. Either way, it was the largest IPO in history by proceeds.

SpaceX later hit an intraday record of $225.64 a share before falling hard. TradingView reports the stock closed Monday, September 21, at $151.85, down 5.7% from its first-day close and nearly 33% below its record high. Yahoo Finance puts the current market cap at almost $2.1 trillion as of September 23. The volatility has been significant, even for the one company in this trio that public investors can actually buy.

Two Trillion-Dollar Companies That Don't Trade Yet

OpenAI and Anthropic account for roughly $3.2 trillion of the $5.2 trillion total, according to TradingView. That's about 62% of the combined figure resting entirely on private-market bets.

OpenAI closed a $122 billion funding round in March 2026 at an $852 billion valuation, according to Crypto Briefing. Bloomberg reports the company is now discussing a new round at roughly $1.2 trillion. OpenAI has pushed back its IPO plans and isn't expected to list in 2026, per TradingView, with Crypto Briefing pointing to a possible 2027 timeline. OpenAI is projecting a net loss of about $14 billion for 2026, according to Crypto Briefing, and Yahoo Finance and AOL both report the company is projecting $278 billion in negative free cash flow through 2030.

Anthropic closed a $65 billion round in May 2026 at a $965 billion valuation, per Crypto Briefing, and has confidentially filed for an IPO that could target a valuation as high as $2 trillion. BigGo Finance reports Anthropic pushed that listing from October to November, in part to present full third-quarter financials and in part to counter competitive pressure from OpenAI's newer GPT-6 Astra model, which BigGo says has overtaken Anthropic in some enterprise spending metrics. Yahoo Finance and AOL both report Anthropic won't reach positive cash flow until 2028.

Not Exactly Apples to Apples

The 1980-2025 IPO figure measures value at the moment of listing and isn't adjusted for inflation. The AI figures for OpenAI and Anthropic are prospective valuations for companies that haven't listed at all. TradingView, BigGo Finance and Benzinga all flag this directly.

The Financial Times, cited by BigGo Finance and Benzinga, estimates private US unicorns overall are collectively worth about $5.3 trillion based on their latest funding rounds. That means AI's biggest three names account for nearly the entire private-market megacap universe. Jason Calacanis, co-host of the All-In Podcast, has flagged this shift as evidence that private markets are now capturing value that used to flow to public shareholders after a company had already proven itself.

The Bull Case and the Warning

The bull case is straightforward: if Anthropic lists near its $2 trillion target and SpaceX's post-IPO trading holds up, it validates the idea that AI infrastructure companies deserve valuations that used to require entire industries to generate.

The warning comes from Apollo Global's chief economist Torsten Slok, cited by Yahoo Finance and AOL. Slok says major tech firms need to roughly triple their cash flow by 2030 or risk weakening the broader AI trade and slowing US GDP growth. That's not a fringe concern. It's coming from the chief economist at one of the largest alternative asset managers in the world, and it lands directly on companies that are currently losing tens of billions of dollars a year.

None of this is illegal, none of it is fraud, and nobody is accusing these companies of cooking the books. It's private capital making a bet. The open question is whether OpenAI's and Anthropic's actual IPOs, whenever they happen, will confirm the bet or reset it. SpaceX's 33% drop from its own record high is the only real-world data point anyone has so far.