SpaceX vs OpenAI. Who IPOs first before 2028?

Polymarket says SpaceX at 81%. That's not surprising. But the reasoning behind that number is more interesting than the number itself.

SpaceX has one thing OpenAI doesn't: Elon Musk has actually said he doesn't want to IPO. That's a headwind, not a tailwind. Yet the market still prices SpaceX as the heavy favorite.

Why? Because OpenAI's path to IPO is structurally messier. They're mid-conversion from nonprofit to for-profit. That legal restructuring alone adds months of uncertainty. Then add regulatory scrutiny, Microsoft's equity stake complications, and Sam Altman's ongoing equity negotiations.

SpaceX is a cleaner story even if Musk is reluctant. One person changes his mind, the machine is ready to go. OpenAI needs the machine to be built first.

81% for SpaceX isn't irrational. But the real edge in this market isn't picking the winner. It's watching for news that moves OpenAI's probability fast. Right now at 19% it only needs one structural announcement to jump.

That's where the asymmetry lives.

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