SpaceX employees cheer after the closing bell at the Nasdaq MarketSite following the launch of SpaceX's initial public offering (IPO) in New York on June 12, 2026. Shares in Elon Musk's SpaceX closed almost 20 percent higher on their trading debut Friday after the biggest IPO in history, making the polarizing entrepreneur the world's first trillionaire as he vowed to take humanity to Mars. (Photo by TIMOTHY A. CLARY / AFP via Getty Images)