# GM cancels rare earth magnet supply pact with Vacuumschmelze *SEC filings reveal General Motors ended a 10-year offtake contract taking 90% of a South Carolina factory, triggering arbitration over domestic EV supply lines.* **Published:** October 23, 2026 **By:** Mina Okoro **Section:** Semiconductors & AI Hardware — Cross-border **Format:** Breaking **Confidence:** high **Source:** https://eastasiabrief.com/semiconductors/gm-cancels-rare-earth-magnet-supply-pact-vacuumschmelze-886 **Publisher:** East Asia Brief (https://eastasiabrief.com/) --- ## What to know - GM terminated a 10-year magnet deal covering 90% of a 2,000-ton Sumter plant - Unit e-VAC filed arbitration against GM over the July 1 termination - Energy Fuels closes its $1.79 billion VAC buyout by Dec. 31, 2026 ![A technician monitors automated equipment as a robotic arm moves large metal rings along a conveyor belt in a manufacturing facility. (AI-generated image)](https://eastasiabrief.com/media/2026-10-23-a08c3cc04e68.webp) *A technician monitors automated equipment as a robotic arm moves large metal rings along a conveyor belt in a manufacturing facility. (AI-generated image)* General Motors canceled a long-term supply agreement for domestic rare earth permanent magnets, according to regulatory disclosures confirmed Oct. 22, 2026, stalling North American electric vehicle reshoring efforts. The contract covered 90% of the planned output from a 2,000-metric-ton facility built in Sumter, South Carolina by German manufacturer Vacuumschmelze. The factory represented a $500 million investment designed to feed traction motors across GM's Ultium vehicle line. Regulatory filings show the automaker terminated the sourcing agreement with effect from July 1, 2026. The move prompted e-VAC Magnetics, the American unit of Vacuumschmelze, to initiate binding arbitration seeking financial damages. General Motors acknowledged the dispute in a quarterly filing to the U.S. Securities and Exchange Commission on Form 10-Q. The company stated that an electric vehicle motor supplier filed arbitration following the termination of a strategic sourcing agreement. The automaker noted in the filing that it cannot estimate a potential range of loss. General Motors had signed the initial agreement in 2023 to secure localized neodymium-iron-boron magnets, which provide the magnetic field that spins EV motors. Uranium and rare earths producer Energy Fuels disclosed the dispute in an amended Form 8-K filed Oct. 13, 2026. Energy Fuels agreed in June to acquire Vacuumschmelze from private equity firm Ara Partners in a $1.79 billion cash-and-stock deal. Energy Fuels stated that a key customer terminated a commercial supply agreement on July 1. The filing noted that e-VAC Magnetics began arbitration proceedings days later to recover compensation for the canceled volume. The disclosure forced an amendment to the merger terms between Energy Fuels and Ara Partners. The revised pact incorporates price adjustment clauses to offset potential balance sheet liabilities resulting from the lost commercial revenues. Vacuumschmelze generated €211.5 million ($228 million) in group revenue during the first half of 2026. Its permanent magnet division accounted for €82.4 million ($88.8 million) of that revenue, according to audited exhibits attached to the filing. The Sumter plant was central to Washington's drive to decouple defense and automotive manufacturing from Chinese supply chains. China controls more than 90% of global rare earth magnet manufacturing and almost all heavy rare earth refining capacity. Federal agencies had backed the South Carolina factory with substantial capital grants. The U.S. Department of Defense awarded the project $94.1 million under Title III of the Defense Production Act in September 2023. The U.S. Department of Energy granted the facility an additional $111.9 million in March 2024. That funding came through the Qualifying Advanced Energy Project Tax Credit program under Section 48C of the Internal Revenue Code. Western automakers face steep cost penalties when attempting to establish independent mineral refining and sintering pipelines. Sintering—the industrial process of compressing and heating alloy powders into dense solid magnets—remains concentrated in Asian production hubs. Chinese manufacturers benefit from integrated upstream separation facilities, state grid power subsidies and economies of scale. Processing rare earths outside China carries operating cost premiums estimated between 30% and 50% across key magnet grades. Slowing electric vehicle sales growth across North America has forced legacy carmakers to reconsider high-cost supply obligations. General Motors scaled back previous medium-term electric vehicle assembly targets to align capital outlays with consumer adoption rates. The contractual dispute leaves the Sumter site without its primary commercial anchor customer. The plant held an opening ceremony in July 2026, aiming to ramp commercial deliveries to federal and commercial buyers through 2027. Fellow domestic magnet developer MP Materials continues separate deliveries of sintered magnets to General Motors from its Texas plant. That arrangement forms the remaining domestic magnet pipeline for the Detroit automaker. The filings do not state the official commercial grounds for terminating the agreement, and neither General Motors nor Vacuumschmelze has published the damage claim amount sought in arbitration. Energy Fuels expects to close its acquisition of Vacuumschmelze before Dec. 31, 2026, subject to final regulatory sign-offs and purchase price adjustments linked to the arbitration proceeding. ## Impact map | Event | Korea | China | Japan | Global impact | | --- | --- | --- | --- | --- | | GM cancels Sumter magnet contract | Battery and motor builders face slower US localized supply chain mandates | Retains over 90% of global sintered NdFeB magnet processing share | Hitachi Metals licensees face higher price scrutiny from Western EV clients | Western EV supply chain costs rise as off-China magnet scale falters | | GM cancels Sumter magnet contract | Battery and motor builders face slower US localized supply chain mandates | Retains over 90% of global sintered NdFeB magnet processing share | Hitachi Metals licensees face higher price scrutiny from Western EV clients | Western EV supply chain costs rise as off-China magnet scale falters | ## In this story - **Companies:** General Motors, Energy Fuels - **Tickers:** GM, UUUU - **Exposed:** MP Materials - **Policy:** Subsidies, Tax Credits - **Impact:** Supply Chain, Order Book, Capex ## Primary sources 1. sec.gov 2. streetinsider.com 3. primexbt.com 4. daijiworld.com 5. marketindex.com.au --- Cite as: East Asia Brief, "GM cancels rare earth magnet supply pact with Vacuumschmelze," October 23, 2026. https://eastasiabrief.com/semiconductors/gm-cancels-rare-earth-magnet-supply-pact-vacuumschmelze-886