Eversource Energy
publicly traded, Fortune 500 energy company
Eversource Energy is a publicly traded, Fortune 500 energy company headquartered in Springfield, Massachusetts with additional corporate offices in Hartford, Connecticut, and Boston, Massachusetts, with several regulated subsidiaries offering retail electricity, natural gas service and water service to approximately 4 million customers in Connecticut, Massachusetts, and New Hampshire.
Following its 2012 merger with Boston-based NSTAR, Northeast Utilities had more than 4,270 circuit miles of electric transmission lines, 72,000 pole miles of distribution lines, and 6,459 miles of natural gas pipeline in New England.
Through predecessors New England Gas & Electric System and Commonwealth Energy Systems, Eversource is the direct legal successor of the Associated Gas & Electric System, a labyrinthine trust corporation based in Massachusetts controlling over a hundred regional gas, electric, railroad and other utility monopolies across the United States, and as distant as Manila. On February 2, 2015, this company and all its subsidiaries rebranded themselves as "Eversource Energy". The stock symbol changed on February 19, 2015, from "NU" to "ES".
Corporate structure
Before its rebranding, the company operated six main subsidiaries: Connecticut Light and Power (CL&P), Public Service Company of New Hampshire (PSNH), Western Massachusetts Electric Company (WMECO), Yankee Gas Services Company (Yankee Gas), NSTAR Electric, and NSTAR Gas. NSTAR itself was the product of corporate mergers, and included the former Boston Edison Company, Cambridge Electric Light Company, Commonwealth Electric Company, Commonwealth Gas, and Cambridge Gas Company. All now currently operate under the Eversource name.
Eversource remains Connecticut's largest electric utility, serving more than 1.2 million residential, municipal, commercial and industrial customers in approximately 149 cities and towns.
Eversource is also New Hampshire's largest electric utility, serving over 500,000 customers, including homes and businesses, in 211 cities and towns throughout the state.
Begin with the source’s own compact description: “Eversource Energy” is publicly traded, Fortune 500 energy company. The dossier treats that line as a proposition to test through Eversource, Energy and publicly, not as a finished interpretation.
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The record creator and administrative purpose are central evidence, because official documentation reflects both action and institutional priorities. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q3344199. VIAF identifies the subject as 131788032. The Library of Congress control number is nr90001203. 3 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 2012 and 2015.
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This entry incorporates text from “Eversource Energy” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.