Principal Mineral

About Principal Mineral

Principal Mineral operates as a holding company focused on rebuilding the domestic supply chain for strategic materials essential for advanced technologies. Founded in 2024 by CEO Adam Johnson and COO Wes Spurlock, the Southlake, Texas-based firm is developing the "missing midstream"—the manufacturing layer between raw metals and finished electronics that has largely moved overseas. Johnson has a background in the magnet and defense industries and was involved in building MP Materials.

The company's business model involves acquiring, developing, and scaling infrastructure and capabilities to address weaknesses in strategic supply chains. It executes this strategy through a portfolio of operating subsidiaries. In 2025, Principal Mineral acquired and relaunched Camden Copper in South Carolina, the only North American producer of defense-grade electrodeposited copper foil for printed circuit boards (PCBs). In June 2026, the company acquired Isola Group, a manufacturer of copper-clad laminates and dielectric prepregs, which are also used in PCBs. This acquisition, combined with Camden Copper, created a vertically integrated Western platform for two foundational PCB materials. The company also acquired exclusive rights to a rare earth metal production technology in 2025.

Principal Mineral serves clients in the defense, electronics, aerospace, AI infrastructure, and energy industries by supplying critical material inputs. Its offerings include copper foil, copper-clad laminates, and rare earth materials. The company's approach is powered by an intelligence engine that uses AI and data analysis to identify supply chain trends, forecast market conditions, and guide investment. Following its acquisition of Isola, the combined company employs approximately 1,300 people across 10 facilities worldwide. The company secured approximately $280 million in new funding in June 2026, co-led by Overmatch Ventures and The New Industrial Corporation, to support this acquisition and further expansion.