NSTAR Electric Company is a U.S.-based electric utility company focused on electricity distribution, primarily serving the Massachusetts area. It operates as a subsidiary of Eversource Energy, one of the largest energy providers in the region. NSTAR ensures reliable electricity transmission and delivery to households and businesses in its service area. The "PFD 4.25" class of shares refers to preferred stock with a 4.25% dividend yield, making it appealing for investors seeking stable income.