Did you actually read the S-1 ?

Tesla is mentionned 87 times. And even they explicitly state that they have strategic collaboration. They supposedly biggest projects are developped together (Macrohard, Terafab - all fugazzi, but still).

Related party transactions are close to a $1 Billion in 2025.

xAI perhaps. But that wasn’t even a part of spacex last year and the company existed just fine.