The private-market AI boom is starting to move toward the public market, and the accountability that comes with it. Anthropic has confidentially filed to go public, SpaceX/xAI is preparing for one of the largest IPOs ever, and OpenAI seems to be preparing for its own filing. This week is not just about the companies listing shares though, it is about whether public investors will go along with what the private industry has been indicating: that frontier AI can convert their massive compute spending, high valuations, and ambitious growth stories into business value.
Anthropic’s confidential IPO filing is the clearest signal yet that frontier AI companies are moving from private-market hype into public-market scrutiny. The company recently reached a $965 billion valuation, surpassing OpenAI, but the real test will be what investors learn once financial disclosures become public: revenue quality, compute costs, customer concentration, and whether Claude’s enterprise momentum can justify one of the largest tech listings ever.
Reuters reports that OpenAI is preparing a confidential IPO filing and could aim to go public as early as September. That puts OpenAI in direct public-market comparison with Anthropic and SpaceX/xAI, forcing investors to ask a harder question than “who has the best model?”: which company has the strongest path from usage and capability to profit, disclosure discipline, and long-term market trust?
SpaceX is targeting a June 12 Nasdaq listing at a $1.75 trillion valuation, aiming to raise $75 billion and surpass Saudi Aramco as the largest IPO in history. The filing reveals that Starlink is the only profitable segment, generating $4.42 billion in operating income in 2025 while the xAI merger added $4.94 billion in net losses for the year. Musk retains voting control through a dual-class share structure, which means public investors are buying exposure to the business without proportional influence over its direction.
BigDATAwire frames the core economics behind this IPO wave: frontier AI companies are not simply raising money to grow faster; they are raising money because compute, talent, data centers, GPUs, networking, and power are becoming structural costs of the business. The piece is useful because it connects IPO timing to capital intensity: public markets may become the next funding layer for the AI buildout.
Axios takes the investor-skeptic angle: even if SpaceX, OpenAI, and Anthropic become historic listings, that does not automatically make them good buys for everyday investors. The useful point is discipline. These IPOs may be priced for perfection before public investors ever get access, and broad index exposure may offer a less risky way to participate in the AI boom without chasing the most crowded trade.
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Going Deeper
Optional reads for those who want more. (Some may be behind a paywall)
SpaceX's galaxy mathAxiosA useful deeper read on how SpaceX frames its total addressable market, including AI, and why huge TAM claims deserve careful interpretation.
How long is Anthropic's lease with SpaceX? Opinions varyTechCrunchGood context on the Anthropic–SpaceX compute relationship, which matters because compute contracts may become one of the most important financial details in frontier AI IPOs.