# Principal Mineral

Startup profile on Capital Atlas: https://capitalatlas.ai/startups/principal-mineral

- Industry: Materials
- Headquarters: Southlake, US
- Website: www.principalmineral.com
- Total disclosed funding: $209M
- Latest round: Series A (Jun 15, 2026)
- Investors on record: 4

## About

Principal Mineral, based in the US, specializes in providing critical materials for high-tech industries, including defense and energy, focusing on copper foil and rare earth elements to support advanced manufacturing. Founded in 2024, Principal Mineral is dedicated to supplying essential materials for high-tech sectors, including defense technologies. The company is headquartered in Southlake, US and led by CEO Adam Johnson. In June 2026, Principal Mineral raised an approximately USD 280 million of debt and equity capital amount of venture funding co-led by new investors Overmatch Ventures and New Industrial Corporation, with participation from another new investor J2 Ventures and Ensemble VC. Other unspecified investors also participated in the round.
Principal Mineral specializes in the development and supply of critical materials essential for various high-tech industries, particularly in defense, artificial intelligence (AI), energy, and advanced manufacturing. The company's core offerings include high-performance copper foil, refined rare earth elements, and electromagnetic interference (EMI) shielding materials, which are vital for applications such as printed circuit boards (PCBs) used in defense technologies and advanced electronic systems. Additionally, Principal Mineral has acquired exclusive rights to innovative production technologies for rare earth metals, enhancing its capability to address supply chain vulnerabilities and support high-performance computing systems, large-scale energy storage, and next-generation semiconductor technologies. The primary customer base encompasses manufacturers in North America and globally, focusing on sectors that require sophisticated electronic components and robust energy solutions.
Principal Mineral's revenue model is structured around B2B transactions and strategic partnerships, enabling the company to serve various industries with its specialized materials. The firm engages directly with manufacturers and technology companies requiring essential components, such as multilayer PCBs, which leverage its copper foil and laminates. Transactions typically involve bulk orders, with customers entering agreements based on specific project requirements and anticipated product usage. Pricing structures are established through direct negotiations, ensuring competitive rates for high-quality materials tailored to the clients' needs. Principal Mineral's flagship products, such as its copper foil and advanced laminates, are integral to the production processes of defense and commercial technologies, positioning the company as a vital supplier in these critical markets.
In June 2026, Principal Mineral raised in venture funding, which will be utilized to accelerate growth and enhance operational capabilities. The company plans to expand its market reach, targeting new geographic regions and industries that demand its advanced materials. This strategic investment is anticipated to support the development and launch of new product lines, further strengthening its position in high-tech sectors.

## Funding rounds

- Series A, Jun 15, 2026, $209M — J2 Ventures, Ensemble VC, Overmatch, New Industrial Corporation

## Investors

- J2 Ventures (https://capitalatlas.ai/funds/j2-ventures) — Series A
- Ensemble VC (https://capitalatlas.ai/funds/ensemble-vc) — Series A
- Overmatch (https://capitalatlas.ai/funds/overmatch) — Series A
- New Industrial Corporation (https://capitalatlas.ai/funds/new-industrial-corporation) — Series A