Principal Mineral
Developer of domestic critical mineral and material supply chain solutions, producing strategic metals, high-performance alloys, copper foil, and PCB laminates for defense, AI, energy, and advanced manufacturing.
- CEO / Founder
- Adam Johnson
- Team Size
- 1001-5000
- Stage
- Growth Stage
- Total Funding
- $280M
- Latest Round
- Venture Round
- Key Investors
- Overmatch Ventures; The New Industrial Corporation; J2 Ventures; Ensemble VC; Lane42 Investment Partners (credit facility)
Technology & Products
Key Products
Camden Copper (electrodeposited copper foil — North America's only producer); Isola Group (copper-clad laminates and dielectric prepregs for PCBs); Rare Earth Fluoride and Metal (via REMAFS process licensed from Ames National Laboratory/CMI); strategic metals and high-performance alloys production; supply chain intelligence platform.
Technological Advantage
Exclusive license to REMAFS (Rare Earth Metals via Alternative Fluoride Salt) process from Ames National Laboratory/CMI — a safer, more scalable rare earth metal production method; ownership of North America's only electrodeposited copper foil facility (Camden Copper); acquisition of Isola Group (114-year-old PCB laminate leader); AI-driven supply chain intelligence platform.
Differentiation
Value Proposition
Rebuilding the U.S. "missing midstream" of critical materials supply chain — the manufacturing layer between raw metals and finished electronics — through a platform of acquired and scaled production assets, proprietary rare earth processing technology, and an intelligence engine for supply chain visibility.
How They Differentiate
Unlike MP Materials (mining-focused) or Lynas (separation-focused), Principal Mineral targets the "missing midstream" — the processing and manufacturing layer between raw materials and finished components. Their platform model combines multiple production assets (copper foil, laminates, rare earth metals) with an intelligence engine, rather than focusing on a single segment of the supply chain.
Market & Competition
Target Customers
U.S. Department of Defense, defense contractors, AI infrastructure operators, electronics manufacturers, PCB fabricators, aerospace OEMs, energy sector, and advanced manufacturing companies.
Industry Verticals
Defense & National Security; Artificial Intelligence Infrastructure; Electronics & PCB Manufacturing; Aerospace; Energy; Advanced Manufacturing (including additive manufacturing)
Competitors
MP Materials (NYSE: MP); Lynas Rare Earths (ASX: LYC); Neo Performance Materials
Growth & Milestones
Growth Metrics
~1,300 employees across 10 facilities worldwide (post-Isola acquisition); operations in North America, Europe, and Asia.
Major Milestones
2024: Company founded by Adam Johnson and Wes Spurlock; 2025: Acquired and relaunched Camden Copper (North America's only electrodeposited copper foil facility); 2025: Acquired exclusive rights to REMAFS rare earth processing technology from Ames National Laboratory/CMI; 2025: Strategic alliance with ReElement Technologies for rare earth midstream; 2026: Acquired Isola Group (114-year-old PCB laminate manufacturer); 2026: Raised ~$280M in funding co-led by Overmatch Ventures and The New Industrial Corporation.
Notable Customers
U.S. Department of Defense; defense contractors (F-35 supply chain); AI/data center infrastructure operators; PCB manufacturers; General Motors (via CEO's prior work at MP Materials/Vacuumschmelze)