SpaceX's IPO prospectus is 377 pages long, yet vague around Musk's long-term ambitions for space tourism, asteroid mining and real estate.

SpaceX has finally made the contents of its IPO filing public, weeks ahead of what is expected to be the largest IPO ever.

Elon Musk's SpaceX is moving ahead with plans to go public in what some expect will be the biggest IPO ever.