Five years ago, GM made a bet that almost no automaker was willing to make: it committed to becoming the anchor customer for a domestic rare earth magnet manufacturer that didn’t yet have a factory. Today, that factory exists, it’s in Fort Worth, Texas, and GM’s labs in Pontiac, Michigan are testing the magnets it produces inside actual electric motors.
The partnership with MP Materials, signed in 2021, was always about more than securing parts. China currently processes roughly 90 percent of the world’s rare earth materials, a concentration that makes every automaker’s EV motor supply chain vulnerable to geopolitical disruption. GM’s arrangement with MP Materials routes around that dependency by connecting three domestic points: rare earth materials mined and refined at Mountain Pass in California, magnet manufacturing at MP’s Independence facility in Fort Worth, and motor development and validation at GM’s Michigan labs. Mine to magnet to motor, all within U.S. borders.
MP Materials’ Mountain Pass operation is North America’s only active, large-scale rare earth mining and refining site. The Independence facility in Fort Worth is the piece that didn’t exist in 2021, and GM’s early commitment as the foundational automotive customer was what gave MP Materials the demand certainty to build it. Commercial shipments of production magnets from MP to GM are expected before the end of 2026.
The engineering rationale for this investment starts with what a permanent magnet actually does inside an EV motor. The stator generates a rotating magnetic field; the permanent magnets inside the rotor interact with that field to produce torque. Permanent-magnet motors offer strong efficiency and power density, which matters when the engineering brief is maximizing range and performance within a constrained package. But automotive-grade magnets must survive heat, vibration, and mechanical stress that would destroy a consumer-grade component, and they must do it consistently across years of service.
GM’s history with this technology is longer than most people realize. The company’s researchers helped pioneer neodymium-based permanent magnet production in the early 1980s. The first-generation Chevrolet Volt applied permanent-magnet motor technology in a hybrid application. The second-generation Volt introduced a dual-V magnet arrangement to improve torque and reduce noise. The Cadillac EV lineup that followed, now spanning five models from the $50,900 OPTIQ to the low-$400,000s CELESTIQ, runs permanent-magnet motors descended from that same development lineage. So does the 2027 Silverado ZR2, which completed a 505-mile Nevada desert race last week on the strength of a new 481-hp combustion V8, though that truck’s powertrain context is separate from the EV motor story GM is telling today.
Within the current EV motor family, GM engineers have moved from solid to segmented magnets. The segmented design reduces heat buildup and energy loss inside the rotor, a refinement that improves motor efficiency without changing the fundamental architecture. The dual-V magnet arrangement visible in MP Materials’ components, now being validated at Pontiac, reflects the same geometry that earlier generations proved out in the Volt.
GM is not the only automaker chasing domestic magnet supply. Noveon Magnetics announced a multi-year supply agreement with GM in August 2025, with deliveries beginning in July of that year, so MP Materials is not GM’s sole domestic magnet source. That parallel sourcing is, in itself, a supply chain signal: GM is building redundancy into a critical component category rather than accepting a single point of failure, domestic or otherwise.
Shilpan Amin, GM’s Global Chief Procurement and Supply Chain Officer, frames the MP Materials relationship as a demonstration that supply chain resilience requires early commitment under uncertainty. GM signed the agreement before the Independence factory existed, before the manufacturing process was proven at automotive scale, and before every engineering question was answered. That willingness to invest ahead of certainty is what created the factory in the first place. A customer that waits for a supplier to be fully operational before placing an order provides no leverage for a supplier to build the facility at all.
GM has not announced which specific current-production vehicles will be the first to receive magnets from the MP Materials supply chain, or when those vehicles will reach customers. The testing and validation work in Pontiac is the step before that answer exists.
Forty-some years after GM researchers helped develop the neodymium magnet process, the company is now trying to own the supply chain those magnets depend on. Whether China’s 90 percent processing share can be meaningfully reduced is a years-long question, but the Fort Worth factory running today is a more concrete answer than any policy document has produced.
Source: General Motors. Images courtesy of General Motors.
