Last year, SpaceX was involved in more than $660 million worth of transactions with Tesla and The Boring Company.

SpaceX's S-1 paperwork, which pulls back the curtain on the rocket company's finances, is a required step ahead of its hotly anticipated IPO.

SpaceX filed its S-1 on Wednesday, giving the public its first look at the inner workings of Elon Musk's rocket company and AI venture xAI.