SpaceX stands out for the unprecedented size of its planned IPO, and for its close ties to government and members of the administration. The IPO, expected to happen as soon as next week, is set to make Musk the world's first trillionaire if it achieves its targeted valuation of at least $1.8 trillion. It's also expected to make billionaires of several company insiders and investors, while minting millions in wealth for employees.

He is already the richest man in the world, but when SpaceX finally makes its hotly anticipated stock market debut, Elon Musk could become the planet's first trillionaire.…

He is already the richest man in the world, but when SpaceX finally makes its hotly anticipated stock market debut, Elon Musk could become the planet's first trillionaire.