Elon Musk's SpaceX has partnered with Anduril and Palantir to build key parts of the Golden Dome missile shield.

SpaceX is pitching for the part of the Golden Dome initiative called the "custody layer," a constellation of satellites that would detect missiles, track their trajectory, and determine if they are heading toward the U.S., according to two sources familiar with SpaceX's goals.

Should a group led by SpaceX win the contract, it would be the biggest win for Silicon Valley in the lucrative defense contracting industry.