The largest IPO in history gives Elon Musk's rocket company a win, and signals how massive the next OpenAI and Anthropic deals could be.

First-day trading for the aerospace and AI company turned an unprecedented IPO into a $2tn-style market reckoning for public-market readiness.

The SpaceX IPO values the company around $1.77T and estimates Musk’s stake at $866.5B, with broad investor ripple effects.

The ChatGPT maker’s filing joins Anthropic’s AI listing wave and turns “someday” into a real timing option.

The filing fixes SpaceX at 555.6 million shares at $135 apiece, while Musk still controls 82.4% of voting power and public buyers get a sliver of the float.

The 2026 Fortune 500 shows record revenues, profits, and market concentration, with Nvidia crossing $4 trillion in value.