IPOListing poised to become first trillion-dollar debut in USPreparations are underway for a test flight of SpaceX's Starship spacecraft in Starbase, Texas, on Monday. © ReutersMay 21, 2026 06:23 JST(Reuters) -- SpaceX took the wraps off its initial public offering filing on Wednesday, opening the books of the company that has already revolutionized rocket technology, with even larger ambitions to colonize Mars and build AI data centers in space.