Effectively, Musk buying Musk.

He controls both companies and, in practice, has extraordinary influence over their direction. That means he has far more freedom to pursue a deal than almost any other CEO in history. Whether shareholders like it is another matter and, for almost any other listed entity of this size, there would almost certainly be a shareholder revolt.

Many investors struggle to see the industrial logic. Tesla builds cars, robots and AI systems. SpaceX builds rockets, satellites and space infrastructure. The synergies are not immediately obvious.

Musk would likely argue the opposite. Increasingly, he frames both companies as AI businesses. Tesla is building real-world AI through autonomy and robotics. SpaceX is building the infrastructure layer, from satellite communications to data networks and potentially space-based computing. In his mind, the convergence may be inevitable.

The corporate governance implications are profound. A $4 trillion company controlled by the richest man in the world, whose paper wealth already exceeds $1 trillion, is not a structure that will appeal to everyone. For investors who value checks and balances, it may be a bridge too far.

The mechanics are equally interesting. Musk would not be able to pay cash for Tesla, or even a meaningful mix of cash and stock. Any transaction would almost certainly be stock-based, with SpaceX issuing shares to Tesla holders. That makes the Tesla/SpaceX valuation ratio a critical metric for shareholders to watch. The cheaper Tesla becomes relative to SpaceX, the more attractive and achievable such a deal becomes.

In almost any other company, talk of a founder orchestrating a transaction of this scale between businesses he controls would trigger a shareholder revolt. Musk operates in a different universe.

That reality will keep some investors away.

Others will see it as exactly the reason to own the stock.

The question may not be whether Musk wants to build an empire spanning AI, robotics, mobility, communications and space.

The question is whether anyone can stop him.