Eversource Energy is a public utility holding company operating through wholly-owned subsidiaries that provide regulated energy and water delivery services across Connecticut, Massachusetts, and New Hampshire. The company generates revenue through four main business segments: electric distribution to approximately 3.6 million customers, electric transmission infrastructure operated as part of the regional ISO-NE grid under FERC-approved formula rates, natural gas distribution to approximately 897,000 customers, and water distribution to approximately 249,000 customers. Eversource's utilities are regulated by state public utilities commissions and earn returns on invested capital through rate structures that include energy supply pass-throughs (without markup), distribution and transmission charges, and public benefits charges, while customers in competitive markets may choose alternative energy suppliers yet remain dependent on the company's distribution infrastructure.