Juan Hernandez joined SpaceX as a welder in 2015, viewing it as just another job opportunity. Along with his employment, he received company stock that he initially paid little attention to. Following SpaceX's historic IPO, his roughly 6,500 shares are now worth nearly Rs 10 crore. Hernandez, who later moved to Blue Origin, says he plans to keep working and use his experience to teach his children about investing and long-term financial planning.

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.

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