Public Service Enterprise Group Incorporated, through its subsidiaries, operates in electric and gas utility business in the United States. It operates through PSE&G and PSEG Power segments. The PSE&G segment transmits electricity; distributes electricity and natural gas to residential, commercial, and industrial customers; and appliance services and repairs to customers through its service territory, as well as invests in solar generation projects, and energy efficiency and related programs. The PSEG Power segment engages in nuclear generation businesses; and supplies power and natural gas to nuclear power plants and gas storage facilities activities. As of December 31, 2023, it had electric transmission and distribution system of 25,000 circuit miles and 866,600 poles; 56 switching stations with an installed capacity of 39,953 megavolt-amperes (MVA), and 235 substations with an installed capacity of 10,382 MVA; 109 MVA aggregate installed capacity for substations; four electric distribution headquarters and five electric sub-headquarters; 18,000 miles of gas mains, 12 gas distribution headquarters, two sub-headquarters, and one meter shop, as well as 56 natural gas metering and regulating stations; and 158 MegaWatts defined conditions of installed PV solar capacity. Public Service Enterprise Group Incorporated was founded in 1903 and is based in Newark, New Jersey.

Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. The company operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. It engages in the rate-regulated electric generation, transmission, and distribution activities; and rate-regulated natural gas distribution business. In addition, the company generates electricity through coal, nuclear, and natural gas, as well as renewable sources, such as hydroelectric, wind, methane gas, and solar. It serves residential, commercial, and industrial customers. The company was founded in 1881 and is headquartered in Saint Louis, Missouri.

NiSource Inc., an energy holding company, operates as a regulated natural gas and electric utility company in the United States. It operates in two segments, Gas Distribution Operations and Electric Operations. The company distributes natural gas to approximately 3.3 million customers through approximately 55,000 miles of distribution main pipeline and the associated individual customer service lines; and 1,000 miles of transmission main pipeline in northern Indiana, Ohio, Pennsylvania, Virginia, Kentucky, and Maryland. It also generates, transmits, and distributes electricity to approximately 0.5 million customers in various counties in the northern part of Indiana, as well as engages in wholesale electric and transmission transactions. It owns and operates coal-fired electric generating stations in Wheatfield and Michigan City; combined cycle gas turbine in West Terre Haute; natural gas generating units in Wheatfield; hydro generating plants in Carroll County and White County; wind generating units in White County, Indiana; and solar generating units in Jasper County and White County. The company was formerly known as NIPSCO Industries, Inc. and changed its name to NiSource Inc. in April 1999. NiSource Inc. was founded in 1847 and is headquartered in Merrillville, Indiana.

Avangrid, Inc., an energy services holding company, engages in the regulated energy transmission and distribution, and renewable energy generation businesses in the United States. The company operates through Networks and Renewables segments. It is involved in the generation, transmission, and distribution of electricity; and distribution, transportation, and sale of natural gas. In addition, the company operates renewable energy generation facilities primarily using onshore wind power, as well as solar, biomass, and thermal power. Further, it delivers natural gas and electricity to residential, commercial, and institutional customers through its regulated utilities in New York, Maine, Connecticut, and Massachusetts; and sells its output to investor-owned utilities, public utilities, and other credit-worthy entities, as well as generates and provides power and other services to federal and state agencies, institutional retail, and joint action agencies. Additionally, the company delivers thermal output to wholesale customers in the Western United States. It owns eight electric and natural gas utilities, serving 3.3 million customers in New York and New England, as well as owns and operates 9.3 gigawatts of electricity capacity primarily through wind power in 22 states. Avangrid, Inc. was incorporated in 1997 and is headquartered in Orange, Connecticut. The company operates as a subsidiary of Iberdrola, S.A.

Essential Utilities, Inc., through its subsidiaries, operates regulated utilities that provide water, wastewater, or natural gas services in the United States. The company operates through Regulated Water and Regulated Natural Gas segments. It offers water services through operating and maintenance contract with municipal authorities and other parties. In addition, the company provides utility service line protection solutions and repair services to households. It serves approximately 5.5 million residential water, commercial water, fire protection, industrial water, wastewater, and other water and utility customers in Pennsylvania, Ohio, Texas, Illinois, North Carolina, New Jersey, Indiana, Virginia, and Kentucky under the Aqua and Peoples brands. The company was formerly known as Aqua America, Inc. and changed its name to Essential Utilities, Inc. in February 2020. Essential Utilities, Inc. was founded in 1886 and is headquartered in Bryn Mawr, Pennsylvania.

New Jersey Resources Corporation, an energy services holding company, distributes natural gas. The company operates through four segments: Natural Gas Distribution, Clean Energy Ventures, Energy Services, and Storage and Transportation. The Natural Gas Distribution segment offers regulated natural gas utility services to approximately 576,000 customers in Burlington, Middlesex, Monmouth, Morris, Ocean, and Sussex counties in New Jersey; provides capacity and storage management services; and participates in the off-system sales and capacity release markets. The Clean Energy Ventures segment invests in, owns, and operates clean energy projects, including commercial and residential solar installation situated in New Jersey, Rhode Island, New York, Connecticut, Michigan, and Indiana. The Energy Services segment maintains and operates natural gas transportation and storage capacity contracts, as well as provides physical wholesale energy, retail energy and energy management services in the United States and Canada. The Storage and Transportation segment invests in invests in energy-related ventures. It provides heating, ventilation, and cooling services; sales and installation of appliances; offers solar equipment installation, and plumbing repair and installation services; and holds commercial real estate properties. The company was incorporated in 1981 and is headquartered in Wall, New Jersey.

Unitil Corporation, a public utility holding company, engages in the distribution of electricity and natural gas. It operates through two segments, Utility Electric Operations, Utility Gas Operations. The company distributes electricity in the southeastern seacoast and state capital regions of New Hampshire, and the greater Fitchburg area of north central Massachusetts; and distributes natural gas in southeastern New Hampshire and portions of southern and central Maine, including the city of Portland and the Lewiston-Auburn area, as well as electricity and natural gas in the greater Fitchburg area of north central Massachusetts. It also operates 86 miles of interstate underground natural gas transmission pipeline that provides interstate natural gas pipeline access and transportation services primarily in Maine and New Hampshire. In addition, the company provides real estate management services. It serves approximately 108,100 electric customers and 87,500 natural gas customers. Unitil Corporation was incorporated in 1984 and is headquartered in Hampton, New Hampshire.

Via Renewables, Inc., through its subsidiaries, operates as an independent retail energy services company in the United States. It operates through two segments, Retail Electricity and Retail Natural Gas. The Retail Electricity segment engages in the transmission and sale of electricity to residential and commercial customers. The Retail Natural Gas segment is involved in the transportation, distribution, and sale of natural gas to residential and commercial customers. It also provides broker services for retail energy customers; and wireless services and equipment to wireless customers. The company offers its services under the Electricity Maine, Electricity N.H., Major Energy, Provider Power Massachusetts, Spark Energy, and Verde Energy brand names. It operates in 104 utility service territories across 20 states and the District of Columbia; and has approximately 335,000 residential customer equivalents. The company was formerly known as Spark Energy, Inc. and changed its name to Via Renewables, Inc. in August 2021. Via Renewables, Inc. was founded in 1999 and is headquartered in Houston, Texas. As of June 13, 2024 Via Renewables, Inc operates as a subsidiary of NuRetailco LLC.