Elon Musk has ruled out any scenario in which TSMC owns or operates the proposed Terafab chip plant, stating on X on Wednesday that TSMC might at most sublease part of the facility. His companies, Tesla and SpaceX, will build and manage the fab themselves, Musk said.

The statement narrows a potential partnership that Musk confirmed in talks with the world's largest contract chipmaker only days ago. Speculation had grown that TSMC could take a far larger role in the project — possibly owning and running the plant outright. Musk's clarification reduces that likelihood.

What does Musk's statement change?

Under the arrangement Musk describes, control of Terafab stays with his companies. TSMC's participation would be limited to occupying and operating capacity as a sublease tenant, not directing the facility. For Tesla and SpaceX, owning and running the plant means more influence over semiconductor supply at a time when their AI ambitions are boosting demand for high-performance computing hardware.

The trade-off is clear. Launching a chip-making enterprise carries heavy capital requirements and significant execution risk. TSMC's involvement could still transfer manufacturing expertise to the project without requiring Musk's firms to relinquish control of the plant.

What remains unknown?

Neither side has disclosed key parameters of the project:

• Investment amounts
• Planned manufacturing capacity
• How tasks would be divided between the partners
• Whether the sublease model Musk described is reflected in the ongoing negotiations

What is the next trigger?

The next signal will come if discussions with TSMC produce a formal agreement, and if the terms confirm the ownership structure Musk has now outlined publicly. Until then, the scope of TSMC's role inside Terafab remains the central open question for both companies.