Eversource Energy

Eversource Energy is a utility holding company that delivers electricity and natural gas to customers in the states of Connecticut, Massachusetts, and New Hampshire. The company serves residential, commercial, and industrial end‑users through its regulated distribution networks. Its core business consists of transmitting and delivering power and gas rather than generating electricity.

Eversource Energy’s operations are overseen by state public utility commissions that set rates and service standards. The firm is organized as a publicly traded holding company listed on the New York Stock Exchange under the ticker ES. It conducts its service activities through a set of state‑specific subsidiaries, such as the Connecticut Light and Power Company, NSTAR Electric and Gas, and the Public Service Company of New Hampshire.

A distinguishing attribute of Eversource Energy is its status as a regulated monopoly utility, meaning it holds exclusive franchise rights to deliver electricity and gas within its service territories while being subject to governmental oversight. The company places emphasis on maintaining grid reliability and has pursued initiatives to modernize its infrastructure and integrate renewable energy resources. These regulatory and operational characteristics shape its role in the New England energy landscape.

In April 2026, Eversource Energy experienced a phishing and social‑engineering incident that compromised two employee accounts, leading to the exposure of personal data for approximately 3,049 customers across Connecticut, Massachusetts, and New Hampshire. The breach did not affect electric service continuity. This event highlights the cybersecurity challenges faced by utility operators despite their regulated and essential service mandate.