Company Story
1966 - Northeast Utilities (NU) was formed through the merger of Connecticut Light and Power (CL&P) and Western Massachusetts Electric Company.
1992 - NU acquired Holyoke Water Power Company.
1999 - NU merged with New England Electric System (NEES) to form Northeast Utilities System.
2006 - Northeast Utilities System acquired Yankee Energy System.
2012 - Northeast Utilities merged with NSTAR to form Eversource Energy.
2015 - Eversource Energy acquired Public Service Company of New Hampshire (PSNH).
2018 - Eversource Energy acquired Aquarion Water Company.
2020 - Eversource Energy announced plans to acquire Columbia Gas of Massachusetts.