Several allies of Elon Musk are set to make billions if SpaceX's IPO reaches a $2 trillion valuation. Among the biggest beneficiaries would be SpaceX President Gwynne Shotwell (12.6 million shares), CFO Bret Johnsen (9.6 million shares), Director Luke Nosek (33 million shares) and investor Antonio Gracias (503.4 million shares). Musk himself could become a trillionaire.