SpaceX just went public. These alum-founded startups are following its playbook

SpaceX’s public debut could create a new wave of fortunes. But some former employees have already taken its hard-charging engineering culture into industries far beyond rockets. SpaceX finally went public on Friday, marking what could be one of the most profitable stock market debuts ever. The move stands to make Elon Musk, already the world’s wealthiest person, even wealthier, while turning many employees and early investors into millionaires and billionaires overnight.