New Delhi, June 14 -- Elon Musk became the world's first trillionaire on Friday after his rocket and satellite company, SpaceX, made its debut on Wall Street. However, it wasn't just Musk whose title changed. The SpaceX listing, one of the biggest IPOs in history, made a welder who worked at his company for nearly a decade a millionaire.

CBS News reported on Saturday that before Juan Hernandez became a welder at SpaceX, he had never even heard of the company. In an exclusive interview, he said, "It was just another contract job for me at the time."

Hernandez, who now works at Jeff Bezos-owned rocket startup Blue Origin, has approximately 6,500 SpaceX shares. On Friday, the rocket and satellite company's shares closed at $160.95, valuing...