I'm trying to guess why Elon Musk wants to mash SpaceX into xAI — or Tesla. I'm stumped.

Elon Musk's SpaceX is already set for a record-breaking IPO this year. What happens if it merges with xAI before that?

Harun Ozalp/Anadolu via Getty Images

• SpaceX: Very valuable company controlled by Elon Musk.
• xAI and Tesla: Other very valuable companies controlled by Elon Musk.
• Elon Musk's companies routinely feature overlapping tech, employees, and investors. So why potentially merge some?

Elon Musk starts and owns lots of companies. Maybe he's going to change that...