Quanta Services, Inc. provides infrastructure solutions for the electric and gas utility, renewable energy, communications, and pipeline and energy industries in the United States, Canada, Australia, and internationally. The company's Electric Power Infrastructure Solutions segment engages in the design, procurement, construction, upgrade, repair, and maintenance of electric power transmission and distribution infrastructure and substation facilities; installation, maintenance, and upgrade of electric power infrastructure projects; installation of smart grid technologies on electric power networks; and design, installation, maintenance, and repair of commercial and industrial wirings. This segment also offers aviation services; emergency restoration services; and other engineering and technical services; design and construction solutions to wireline and wireless communications, cable multi-system operators, and other customers; and training for electric workers, as well as training for the gas distribution and communications industries. The company's Renewable Energy Infrastructure Solutions segment is involved in engineering, procurement, construction, repair, and maintenance of wind, solar, and hydropower generation facilities, as well as battery storage facilities; and provision of engineering and construction services for substations and switchyards, transmission, and other electrical infrastructures. The company's Underground Utility and Infrastructure Solutions segment offers design, engineering, procurement, construction, upgrade, repair, and maintenance services for natural gas systems for gas utility customers; fabrication services for pipeline support systems and structures and facilities; and engineering and construction services for pipeline and storage systems, and compressor and pump stations. The company was formerly known as Fabal Construction, Inc. and changed its name to Quanta Services, Inc. in November 1997. The company was incorporated in 1997 and is headquartered in Houston, Texas.

NRG Energy, Inc., together with its subsidiaries, operates as an energy and home services company in the United States and Canada. It operates through Texas; East; West/Services/Other; Vivint Smart Home; and Corporate Activities segments. The company produces and sells electricity generated using coal, oil, solar, and battery storage; natural gas; and a cloud-based home platform, including hardware, software, sales, installation, customer service, technical support, and professional monitoring solutions. It offers retail electricity and energy management, line and surge protection products, HVAC installation, repair and maintenance, home protection products, carbon offsets, back-up power stations, portable power, portable solar, and portable lighting; retail services comprising demand response, commodity sales, energy efficiency, and energy management solutions; and system power, distributed generation, renewable and low-carbon products, carbon management and specialty services, backup generation, storage and distributed solar, and energy advisory services. In addition, the company trades in power, natural gas, and related commodities; environmental products; weather products; and financial products, including forwards, futures, options, and swaps. It offers its products and services under the NRG, Reliant, Direct Energy, Green Mountain Energy, and Vivint. It serves residential, commercial, government, industrial, and wholesale customers. NRG Energy, Inc. was founded in 1989 and is headquartered in Houston, Texas.

Solaris Energy Infrastructure, Inc. designs and manufactures specialized equipment for oil and natural gas operators in the United States. The company provides technician support, last mile, and mobilization logistics services. It is also involved in the transloading and storage of proppant or railcars at its transloading facility. In addition, the company develops Railtronix, an inventory management software; and all-electric equipment that automates the low pressure section of oil and gas well completion sites. It serves exploration and production, and oilfield services industries. The company was formerly known as Solaris Oilfield Infrastructure, Inc. and changed its name to Solaris Energy Infrastructure, Inc. in September 2024. Solaris Energy Infrastructure, Inc. was founded in 2014 and is headquartered in Houston, Texas.

Genie Energy Ltd., through its subsidiaries, engages in the supply of electricity and natural gas to residential and small business customers in the United States and internationally. It operates in two segments, GRE and Genie Renewables. The company also develops, constructs, and operates solar energy projects for commercial and industrial customers, as well as its own portfolio; provides energy brokerage and advisory services; markets community solar energy solutions; and manufactures and distributes solar panel, as well as engages in solar installation design and project management activities. Genie Energy Ltd. was incorporated in 2011 and is headquartered in Newark, New Jersey.

Zeo Energy Corp. provides residential solar energy systems, other energy efficient equipment, and related services in Florida, Texas, Arkansas, and Missouri, the United States. The company is involved in the selling and installing of residential solar energy systems that homeowners use electricity required to power their homes. Its residential solar energy systems comprise solar panels, inverters, and racking systems. It also offers insulation services, such as adding insulation to a home's attic or walls; energy efficiency equipment, including hybrid electric water heaters and swimming pool pumps; battery-based energy storage systems; and roofing services. Zeo Energy Corp. was founded in 2005 and is headquartered in New Port Richey, Florida.

SunPower Corporation, a solar technology and energy services provider, offers solar, storage, and home energy solutions primarily in the United States and Canada. Its solutions include the Equinox and SunVault systems which are pre-engineered modular solutions for residential applications that combine solar module technology with integrated plug-and-play power stations, cable management systems, and mounting hardware that enable dealers and installers to complete system installations, as well as for end customers to manage their energy production. The company also provides post-installation monitoring and maintenance services. It serves residential customers, including individual homeowners and new home builders. The company was incorporated in 1985 and is headquartered in Richmond, California. SunPower Corporation operates as a subsidiary of TotalEnergies SE.

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.

iSun, Inc., a solar energy services and infrastructure deployment company, provides design, development, engineering, procurement, installation, storage, and electric vehicle infrastructure services for residential, commercial, industrial, and utility customers in the United States. It provides operation, maintenance, and solar; electrical contracting; and data and communication services. The company was formerly known as The Peck Company Holdings, Inc. and changed its name to iSun, Inc. in January 2021. iSun, Inc. was founded in 1972 and is headquartered in Williston, Vermont.