Justin Fishner-Wolfson, who runs a small investment firm above a tailor shop in San Francisco, is at the helm of a multibillion-dollar windfall.

The winners of SpaceX's blockbuster IPO—valuing the company at $1.75 trillion—might not just be investors, but also the ones who welded the rockets.

Justin Fishner-Wolfson, who runs a small investment firm above a tailor shop in San Francisco, is at the helm of a multibillion-dollar windfall.

Juan Hernandez, a former SpaceX employee who owns 6,500 company shares, could see his wealth balloon by as much as $880,000.

Johnsen, SpaceX’s longest-tenured and only CFO, is now worth about $1.4 billion.