Northeast Utilities is adopting a new name as part of a rebranding effort.
The utility, based in Hartford and Boston, will be known beginning on Feb. 2 as Eversource Energy.
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The company said it launched an internal initiative in 2013 focusing on integrating its electric and gas companies and improving customer service. It included options for the utility's brand as it worked to integrate the company in Connecticut, Massachusetts and New Hampshire.
Northeast Utilities closed its $5 billion purchase of NStar in April 2012, creating one of the biggest utilities in the United States. Subsidiaries include Connecticut Light and Power, NU Transmission, Western Massachusetts Electric Co., Public Service of New Hampshire, NSTAR Electric and Gas and Yankee Gas Services Co.