While investors await the SpaceX IPO, these space stocks are already public, building an economy in Earth orbit and beyond

(Credit: Marie D. De Jesús/Houston Chronicle via Getty Images)

Wall Street is salivating for SpaceX’s blockbuster IPO this week, but demand is so high that retail investors may not be able to buy shares at the offering price and will likely have to pay a steep premium once they trading begins.

While SpaceX is the clear industry leader, there are already a number of publicly traded stocks with exposure to different parts of the expanding space economy.