SpaceX files proposal for $119bn Terafab semiconductor facility in Texas

A formal proposal has been filed with Grimes County, Texas, outlining SpaceX's consideration to invest up to $119 billion in a new semiconductor manufacturing venture known as Terafab. The filing describes the project as a multi-phase, next-generation facility designed for vertically integrated semiconductor manufacturing and advanced computing fabrication. While the total potential spend reaches $119 billion, the initial investment estimate for the project is set at $55 billion, with further capital contingent on future phases.

Elon Musk has indicated that Grimes County is merely one of several locations currently under review for the site. The proposed facility aims to address what Musk describes as a critical shortage in chip production speed required for his companies' artificial intelligence and robotics ambitions. The billionaire has stated that without building the Terafab facility, his organisations will not have the necessary chips, driving the urgent need for this domestic manufacturing capability.

The scope of the project is extensive, targeting the production of chips for AI servers, satellites, SpaceX's proposed orbital data centres, and autonomous Tesla vehicles. Intel has been engaged to contribute to the effort alongside Tesla, creating a collaborative approach to develop the necessary hardware. The facility is intended to produce enough chips to provide one terawatt of power per year, a target Musk argues is essential to meet the demands of xAI's Grok models and robotics initiatives.

This initiative aligns with Musk's broader strategy to secure computing power for xAI's Grok series of AI models while simultaneously building data centres in space. The move reflects a structural shift in the semiconductor sector, where the rise of inference and agentic AI is expected to sustain demand for longer than previous cycles focused solely on model training. The combined SpaceX and xAI entity, valued at $1.25 trillion, is expected to go public in June, potentially bringing significant capital to the project.

The filing highlights the ambition of the project, though specific timelines for construction and operational commencement are not specified in the available documents. The feasibility of manufacturing chips capable of delivering the stated one terawatt of power annually remains a stated ambition rather than a confirmed technical capability at this stage. Investors and industry observers will be watching the regulatory review process in Texas to determine if this massive capital outlay proceeds as planned.