SigmaTron is a mid-sized electronic manufacturing services (EMS) contract manufacturer. SigmaTron assembles printed circuit boards and integrates them into finished electronic products for customers who design the products but outsource manufacturing. SigmaTron serves over 100 active customers across three end markets: industrial electronics (~66% of revenue), consumer electronics (~28%), and medical/life sciences (~6%). SigmaTron's business model involves charging customers for labor, overhead, and materials to assemble their products — customers own the designs, while SigmaTron handles manufacturing execution. SigmaTron also procures components on behalf of customers. Profitability is driven by production volume, labor cost management, and product complexity, with higher-complexity assemblies typically carrying better margins. SigmaTron manufactures across five countries, with Mexico as its largest production hub (~60% of revenue), followed by the U.S. (~24%) and China (~14%), plus smaller operations in Vietnam and Taiwan. The multi-country footprint allows customers to shift production between regions as supply chain strategies evolve. The majority of SigmaTron's workforce is based in Mexico and Vietnam, where labor costs are lower than in the U.S. In July 2025, private equity firm Transom Capital acquired SigmaTron and took the company private.