SpaceX, which confidentially filed for an IPO in April, is planning to disclose its prospectus as soon as next week, according to people familiar with the matter, as Elon Musk's reusable rocket company nears what's expected to be a record share sale. The company is aiming to kick off a roadshow to officially market the deal to investors on June 8, said the sources, who asked not to be named because of a quiet period ahead of the listing process. The filing needs to be disclosed at least 15