Mutual funds can hold private assets. Fidelity holds SpaceX assets in several funds. http://blog.sfgate.com/pender/2015/03/25/see-which-fidelity-funds-invested-

Mutual funds can hold private assets. Fidelity holds SpaceX assets in several funds. http://blog.sfgate.com/pender/2015/03/25/see-which-fidelity-funds-invested-in-spacex/ http://blog.sfgate.com/pender/2015/03/25/see-which-fidelity-... That said, I don't think you can get your hands on Planetary Resources stock.