SpaceX
SpaceX rewrote the economics of spaceflight with reusable rockets, and became the most valuable private company on the planet.
SpaceX was founded by Elon Musk in 2002 with a goal that sounded absurd at the time: make rockets reusable, cut the cost of space by an order of magnitude, and ultimately put humans on Mars. Two decades later it has done most of the first part, its Falcon rockets land and reuse their boosters, it launches more mass to orbit than the rest of the world combined, and it flies NASA’s astronauts.
It is now the most valuable private company on Earth, propelled by Starlink’s satellite-internet business, while Starship, the giant Moon-and-Mars rocket, is the next big bet. People search SpaceX mostly to answer a few blunt questions: who owns it, whether they can buy the stock (they can’t), how much it’s worth, and what Starship and Starlink actually are. Straight answers below, based on widely reported information as of 2025–2026.