Principal Mineral, based in Dallas, TX, positions itself as a leader in rebuilding the industrial 'missing midstream' for strategic materials. In June 2026 it completed the acquisition of Isola Group, a manufacturer of copper-clad laminates and dielectric prepregs used in printed circuit boards. The company has secured approximately $280 million of new funding plus a credit facility to support integration of the combined businesses. Principal Mineral plans to expand advanced manufacturing capacity and continue technology development. It intends to invest long-term in critical supply-chain capabilities across North America, Europe, and Asia. The fresh capital and debt facility underpin the company's near-term growth and integration strategy.

Total raised

$280M

Funding rounds

2

Latest round

Equity

Latest activity

Jun 2026