mdu resources group said monday it aims to pursue a spinoff of its construction services business following an extensive strategic review the supplier of products and services to regulated energy delivery and utilitiesrelated construction materials said becoming a pureplay regulated energy delivery company through a taxadvantaged separation of the unit would enhance shareholder value mdu resources which plans to invest 25 billion into capital projects at its regulated energy delivery businesses over the next five years is working on what the best timeline would be for the business separation this decision reflects the strong financial performance of this business and longterm growth opportunities tied to continued electrification of the economy as well the tax basis of the business and current market conditions chief executive david goodin said