Largest IPO by market cap in 2026?
💡 What the odds say
Most likely: SpaceX at about a 86% chance — very likely.
The field is overwhelmingly concentrated on SpaceX at 87%, driven by its imminent IPO pricing as the largest in history; the single biggest recent shift is SpaceX's surge after the July 4 headline confirming a $135 price and record size, while Anthropic and OpenAI remain distant with no comparable near-term catalysts.
What's driving it
- • SpaceX's odds jumped after TradingKey reported on July 4 that the company priced its IPO at $135 per share, calling it 'the largest IPO in history' and citing S-1 financials.
- • CNBC reported on July 3 that the first known congressional stock buys in SpaceX surfaced after the record IPO, signaling insider confidence and political interest.
- • OpenAI's odds remain at 1% despite The Motley Fool's July 4 report that it is 'headed for a $1 trillion IPO,' because no concrete filing or valuation date has been set.
- • Anthropic's 13% share lacks a recent headline catalyst; its position appears to be a residual bet on AI hype rather than a specific IPO milestone.
Why the front-runners lead
- • SpaceX leads because its IPO is imminent (priced for July 5) with a record market cap, backed by strong institutional and political interest as seen in congressional stock buys (CNBC, Jul 3).
- • Anthropic's 13% reflects its status as the only other credible AI IPO candidate, but it has no recent filing or valuation news to challenge SpaceX.
- • OpenAI's 1% is a long-shot bet on its eventual $1 trillion IPO (Motley Fool, Jul 4), but the lack of a timeline keeps it far behind.
Why it's still open
- • The field could open if SpaceX's IPO underperforms or is delayed—the July 4 pricing headline is the only concrete event, and any negative surprise would crater its odds.
- • Anthropic could overtake if it announces a surprise IPO filing with a valuation exceeding SpaceX's, but no such news exists in the provided headlines.
- • OpenAI would need to announce a specific IPO date and valuation above SpaceX's record to move from 1%, but its $1 trillion target remains speculative without a filing (Motley Fool, Jul 4).
What to watch
- • SpaceX's IPO trading debut on or around July 5–6: a strong first-day pop would lock in its lead; a drop below the $135 price would open the field (TradingKey, Jul 4).
- • OpenAI's S-1 filing or valuation announcement: if it files before year-end with a $1 trillion+ target, odds would shift sharply upward (Motley Fool, Jul 4).
- • Anthropic's IPO filing or a major funding round at a higher valuation than SpaceX: no recent headlines, but any such event would be a direct challenge.
AI-generated · grounded in recent news + odds · informational only, not advice. Verify on the source platform.
Data from Smarkets’s public API, for informational purposes only. PredictPal is not affiliated with any platform and does not facilitate trading.
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How it resolves
Settled by the source platform according to the rules written into this specific market.
ⓘ A market settles under its own written rules, which can lag what looks decided in the news — so the price may not move to 100% the moment an outcome seems obvious.
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