Initial investment was $33.5bn Musk and $7.1bn from other equity investors.

  $1.89bn (~4%) from Prince Alwaleed
  $1bn (~2%) from Jack Dorsey, 
  $500m from Ellison,
  $300m from Fidelity,
  ... and so on.

Those numbers might have changed since.

ps. Alwaleed has also invested $400 million into xAI