The five companies led by Elon Musk have increasingly become intertwined, even before merger chatter.

Two of Elon Musk's companies are merging to build data centers in space, according to a post on the SpaceX website.

“SpaceX has acquired xAI to form the most ambitious, vertically-integrated innovation engine on (and off) Earth, with A.I., rockets, space-based internet, direct-to-mobile device communications and th...