Key Stats
Eversource Energy operates as New England’s largest energy delivery system. The company transmits and distributes electricity, natural gas, and water services throughout Connecticut, Massachusetts, and New Hampshire. Headquartered in both Hartford, Connecticut, and Boston, Massachusetts, the utility serves residential, commercial, industrial, and municipal customers.
The company was formerly known as Northeast Utilities until February 2015 when it rebranded to Eversource Energy. It operates through four primary segments: Electric Distribution, Electric Transmission, Natural Gas Distribution, and Water Distribution. The company focuses on regulated utility operations while investing in grid modernization and renewable energy infrastructure.
Fortune 500-listed Eversource maintains a workforce exceeding 10,000 employees who work to deliver reliable energy services. The company has established itself as a leader in energy efficiency programs and clean energy integration across the Northeast region.
Eversource Energy History
Hartford Electric Light Company founded in 1878, Western Massachusetts Electric Company established in 1886, and Connecticut Light and Power Company formed in 1917, laying the groundwork for what would become Eversource.
Northeast Utilities created through merger of Connecticut Light and Power, Western Massachusetts Electric, and Hartford Electric Light Company, forming the first multi-state utility holding company since the Public Utility Holding Company Act of 1935.
Holyoke Water Power Company joined the Northeast Utilities system, expanding the company’s hydroelectric capabilities.
Public Service Company of New Hampshire became part of Northeast Utilities following the PSNH bankruptcy reorganization, significantly expanding service territory.
Northeast Utilities completed merger with NSTAR, the major electric and gas provider in Greater Boston, creating New England’s largest utility company with combined assets.
Company and all subsidiaries rebranded as Eversource Energy in February, consolidating six operating companies under one customer-facing brand. Stock symbol changed from NU to ES.
Acquired Aquarion Water Company for $1.675 billion, adding water distribution services and 230,000 customers across three states, diversifying service offerings.
Joe Nolan assumed role as Chairman, President, and CEO in May, bringing focus on customer relations and clean energy initiatives.
Announced sale of Aquarion Water Company to refocus on core electric and natural gas utility operations, with $24.2 billion capital investment plan for 2025-2029.
Eversource Energy Leadership
Served as first CEO of Northeast Utilities from 1966, leading the formation of the holding company and championing nuclear power development as the least expensive and cleanest energy option for New England.
Chairman and CEO of Connecticut Light and Power who became president and CEO of Northeast Utilities in 1966, guiding the initial consolidation of the three founding utilities.
Current Chairman, President, and CEO since May 2021. Joined company in 1985 and advanced through customer service, government affairs, and business strategy roles before leading the organization.
Eversource Energy Competitors
Eversource faces competition from several major utility companies across New England and the broader Northeast region. The competitive landscape includes both regional utilities and large national energy providers.
| Company | Primary Service Area | Key Services |
|---|---|---|
| FirstEnergy | Ohio, Pennsylvania | Electric transmission and distribution |
| Entergy | Louisiana, Texas, Arkansas, Mississippi | Electric generation and distribution |
| Con Edison | New York City, Westchester | Electric, gas, steam |
| National Grid | Massachusetts, New York, Rhode Island | Electric and gas transmission |
| Duke Energy | Carolinas, Florida, Midwest | Electric generation and distribution |
| American Electric Power | 11 states, Central/Southern US | Electric generation and transmission |
| Avangrid | New York, New England | Electric and gas utilities |
| Dominion Energy | Virginia, Carolinas | Electric and gas services |
| Ameren | Missouri, Illinois | Electric and gas distribution |
| Unitil | New Hampshire, Massachusetts, Maine | Electric and gas distribution |
Eversource Energy Revenue
Eversource reported annual revenue of $11.90 billion for 2024, representing a slight decline from 2023. The company’s revenue peaked at $12.29 billion in 2022 following significant rate increases and infrastructure investments.
Eversource Energy Acquisitions
Eversource has grown strategically through several major acquisitions. The 2012 NSTAR merger created New England’s largest utility company, combining Northeast Utilities’ Connecticut and New Hampshire operations with NSTAR’s Massachusetts territory. This $4.5 billion transaction added 1.4 million customers.
The company acquired Aquarion Water Company in 2017 for $1.675 billion, entering the water utility business. Aquarion brought 230,000 water customers across Connecticut, Massachusetts, and New Hampshire. Under Eversource ownership, Aquarion expanded through six additional acquisitions including New England Service Company in 2021, The Torrington Water Company in 2022, and municipal water systems in New Hartford and Ansonia, Connecticut.
In 2020, Eversource acquired Columbia Gas operations, though this faced regulatory challenges. The company also purchased a 26-acre portion of the Mystic Property in Everett, Massachusetts from Constellation Energy in December 2024 to support Massachusetts’ clean energy transition.
In early 2025, Eversource announced the sale of Aquarion to the newly created Aquarion Water Authority for strategic refocusing on core electric and natural gas operations. This decision allows the company to strengthen its balance sheet and concentrate capital on transmission and distribution infrastructure investments totaling $24.2 billion through 2029.
The company also divested its offshore wind investments in 2024, exiting a 50 percent partnership with Ørsted to develop two gigawatts of offshore wind projects. These strategic moves position Eversource to focus on regulated utility operations where it maintains strong market positions across New England.
Eversource Energy Market Cap
Eversource maintains a market capitalization of approximately $24.38 billion as of September 2025. The company ranks among the largest utility holding companies in the United States.
FAQs
What services does Eversource Energy provide?
Eversource delivers electric transmission and distribution, natural gas distribution, and water services to approximately 4.6 million customers across Connecticut, Massachusetts, and New Hampshire through regulated utility operations.
When was Eversource Energy founded?
The company traces its origins to 1878-1917 through predecessor utilities. Northeast Utilities formed in 1966 through merger of three companies and rebranded as Eversource Energy in February 2015.
Who is the current CEO of Eversource Energy?
Joe Nolan serves as Chairman, President, and Chief Executive Officer since May 2021. He joined the company in 1985 and advanced through various customer service and strategic roles.
How many employees does Eversource have?
Eversource employed 10,680 people as of December 2024, a five percent increase from 2023, supporting operations across three states and serving over four million customers.
What is Eversource Energy’s stock symbol?
Eversource trades on the New York Stock Exchange under ticker symbol ES. The company changed its symbol from NU to ES in February 2015 during the rebranding.
