NEW YORK, April 30 : Blue Owl sold about half its investment in SpaceX at a $1.25 trillion valuation, the alternative asset manager's co-CEO Marc Lipschultz said on Thursday. "Specifically at SpaceX... we made about 10 (times) our money on that investment," Lipschultz said on a conference call with analysts. "We've sold about half of it at a $1.25 trillion valuation, still holding about half of it." SpaceX is expected to go public later this year at a possible valuation of $1.75 trillion,