Audax-backed EIS, a distributor of process materials, production supplies, specialty wire and cable, completed the acquisition of Norberg-IES, an Oklahoma-based provider of high-voltage fuses and NEMA enclosures, from Argonaut Private Equity, a Tulsa-based private equity firm. Financial terms were not disclosed. "Norberg is a tremendous addition to our growing team. This expansion of our engineered solutions will be of great benefit to our broad customer base. The product lines and capabilities that Norberg provides are an incredible complement to our existing offerings," Glenn Pennycook, EIS CEO.