Massachusetts Electric Company, doing business as National Grid, is a regulated electric utility operating company that engages in the transmission and distribution of electricity. Operating as an indirect wholly owned subsidiary of National Grid USA, which is a subsidiary of National Grid plc, the company serves approximately 1.3 million residential, commercial, industrial, and municipal customers across more than 170 communities throughout central, western, and northeastern Massachusetts. The company provides a comprehensive range of utility products and energy services, including regulated electricity delivery and distribution services; high-voltage electric transmission network operations; default electricity supply procurement through Basic Service; distributed energy resource interconnection services for rooftop solar, community solar, and battery energy storage systems; electric vehicle infrastructure development and make-ready charging programs; Advanced Metering Infrastructure deployment and data management; peak load management and demand response programs; and comprehensive energy efficiency and decarbonization initiatives administered under the Mass Save partnership, which includes residential weatherization, commercial building energy retrofits, and high-efficiency heat pump incentives. Founded in 1884 and headquartered in Waltham, Massachusetts, the company issues regulated debt and preferred equity securities, including its 4.44% Cumulative Preferred Stock. In recent major developments, Massachusetts Electric Company is implementing its Electric Sector Modernization Plan approved by the Massachusetts Department of Public Utilities, driving significant multi-billion-dollar capital investments to modernize the distribution grid, upgrade substation capacity, and expand circuit hosting capabilities for distributed renewable energy; advancing the full-scale deployment of next-generation smart meters across its service territory to enable time-varying electric rates and improved outage management; expanding transmission interconnections to accommodate incoming offshore wind and regional clean energy resources managed by ISO New England; scaling make-ready charging infrastructure under expanded fleet and residential EV programs; and deploying Advanced Distribution Management Systems alongside climate resilience hardening initiatives to mitigate severe weather impacts.