You Can Ignore AI Giants Like SpaceX, but Your 401(k) Won’t

If SpaceX joins major stock indexes, millions of investors could become shareholders through index funds and retirement accounts.

Gwynne Shotwell, President and COO of SpaceX, right, celebrates with colleagues during a bell ringing ceremony for the IPO of SpaceX at the Nasdaq MarketSite in New York, Friday, June 12, 2026, in New York. Frank Franklin II/AP

NEW YORK—While you might want to ignore all the hubbub around SpaceX, Elon Musk and IPOs, your 401(k) likely can’t.

SpaceX is now worth $2.1 trillion after its stock launched 19.2 percent higher in its debut on Wall Street. Whether or not you believe it deserves to be worth more than Exxon Mobil, Bank of America, and Coca-Cola combined, the market does. And if SpaceX maintains that big a value, it will join some high-profile stock indexes.