Here's a start:
Starship uses steel from Steel Dynamics Inc.
SpaceX has 6 subsidiaries worldwide:
Dogleg Park Llc - United States
Pioneer Aerospace Corp - United States
Spacex Sa - Luxembourg
Starlink Services Llc - United States
Space Exploration Technologies Corp - United States
Swarm Technologies Inc - United States
As for subcontractors, there's the rub:
"There's a YouTube video of Elon speaking somewhere in 2003 saying ... "we're really just a systems integrator, we're buying things from other people", but by the time I showed up in 2005 that had completely turned around and pretty much everything was getting done in-house.
And you can see why when you see the interactions with these suppliers, particularly the ones in the space industry. They think they're the only ones who can make this widget or who have the secret sauce, and when you say "no, you're too expensive", they say "well, that's what it is". And they're used to customers who, if they slip the schedule and double the price, the customer shrugs and goes back to headquarters and says, "well, it's gonna take twice as long and it's gonna cost twice as much", and that's how things go in a traditional government run program.
But SpaceX would say "no, that's not acceptable", and they'd cancel the contract. And sometimes these suppliers were literally scoffing on the phone as you hung up, and call you back a few months later saying "so, have you changed your mind yet?" And being able to say to them that "no, if you can do it, then maybe somebody else can do it too", like either SpaceX figured out how to do it themselves, because they hired some smart people and gave them the resources and tools, or you find another supplier with maybe a non-space version and you upgrade and qualify it for space.
And now what you've done, this backward supplier has bred a competitor for themselves, where they're not used to competition. I mean, many of the suppliers in this industry would just go out of business in a heartbeat if competition were actually introduced.
So really that's the game changing stuff that SpaceX has been doing: bringing stuff in-house, not just because it gives them control of cost and schedule, but because the space suppliers, traditional suppliers just don't get it. They're not used to being held to schedules and budgets.
And that's not true of everybody, but there is list of anecdotes I could tell you about suppliers with this attitude. And in each case either SpaceX brings it in-house and makes it successfully, or they find another supplier and upgrade it, and that supplier is usually thrilled to have a whole new market opened up for them."
