Principal Mineral has announced the acquisition of Isola Group, a premier manufacturer of copper-clad laminates and dielectric prepregs used in printed circuit boards (PCBs). The transaction closed on June 16, 2026.

The company also announced approximately $280 million of new funding to support its next phase of strategic, long-term growth. The funding was co-led by Overmatch Ventures and The New Industrial Corporation, with participation from J2 Ventures, Ensemble VC, and other existing and new investors, alongside a credit facility provided by Lane42 Investment Partners. The capital raise will support integration of the combined company, expansion of advanced manufacturing capacity, continued technology development, and long-term investment in critical supply-chain capabilities across North America, Europe, and Asia.