Elon Musk arrives at the U.S. District Court in Oakland, Calif., Tuesday, April 28, 2026. Musk's commercial space company, SpaceX, is readying for what is expected to be the largest IPO in history. (Godofredo A. Vásquez/AP) As Elon Musk's SpaceX readies for an initial public offering June 12, new details have emerged that suggest the world's richest person is aiming for the largest IPO in history. SpaceX also launched a website Thursday morning, spacexipo.com, aimed at attracting retail investors.