An unnamed financial partner of Elon Musk has built a position in his aerospace company valued at $40 billion. The investment was not previously disclosed and represents a large volume of private capital within the SpaceX equity structure.

The $40 billion stake underscores the increasing influence of private investors on the valuation and ownership of the space venture. The specific identity of the backer remains private, and the investment underscores the scale of ownership held by undisclosed individuals in Musk's company.