What Prediction Markets Are Forecasting

Prediction markets currently give SpaceX a strong lead in this race. Traders collectively estimate there is an 80% chance that SpaceX will go public before OpenAI does. In simpler terms, this means the market sees about a 4 in 5 likelihood that Elon Musk's rocket company will have its stock market debut first. This shows a high, though not absolute, level of confidence in that outcome, with OpenAI seen as the clear underdog before the end of 2027.

Why the Market Sees It This Way

The high probability for SpaceX is based on a few clear factors. First, SpaceX has been around since 2002 and has a more traditional, capital-intensive business model in aerospace. Going public is a classic way for such companies to raise the enormous funds needed for projects like Starship and Starlink. There has been persistent speculation and reported internal discussions about a SpaceX IPO for years, especially as its Starlink satellite internet service reaches profitability.

In contrast, OpenAI's structure and recent turmoil make an IPO seem more distant. OpenAI started as a non-profit in 2015 and later created a "capped-profit" arm. This unique hybrid structure is not typical for public markets. More importantly, the company's governance was shaken by the brief ousting and return of CEO Sam Altman in late 2023, revealing instability that public investors typically avoid. While OpenAI is a leader in AI, its path to a standard IPO appears more complex and less certain than SpaceX's.

Key Dates and Events to Watch

There are no fixed IPO dates for either company, so the timeline depends on corporate decisions. For SpaceX, the main signal to watch is the financial performance and spin-out potential of Starlink. If SpaceX announces that Starlink has achieved consistent, strong profitability on its own, it could be a major step toward an IPO for either the entire company or that specific unit. Any official filing with the Securities and Exchange Commission (SEC) would be the definitive event.

For OpenAI, watch for any major changes to its corporate governance and profit structure. If the company announces a full restructuring into a traditional for-profit corporation, it would significantly increase its IPO chances. Also, monitor its revenue growth from products like ChatGPT Enterprise and its API. Sustained high revenue could build pressure to go public, but the company must solve its governance questions first.

How Reliable Are These Predictions?

Prediction markets are generally useful for aggregating diverse opinions on future corporate events, but this specific question has limited historical parallels. Markets have been decent at forecasting the timing of major IPOs when there is substantial public speculation and clear financial milestones. However, both these companies are unusual. SpaceX is a private behemoth in a unique industry, and OpenAI has a novel corporate form. The biggest limitation is that the decision rests entirely with a small group of executives and board members, whose motivations may not be purely financial. A sudden strategic shift by either Elon Musk or Sam Altman could quickly upend the current market consensus.