American Water Works Company, Inc., through its subsidiaries, provides water and wastewater services in the United States. It offers water and wastewater services to approximately 1,700 communities in 14 states serving approximately 3.5 million active customers. The company serves residential customers; commercial customers, including food and beverage providers, commercial property developers and proprietors, and energy suppliers; fire service and private fire customers; industrial customers, such as large-scale manufacturers, mining, and production operations; public authorities comprising government buildings and other public sector facilities, such as schools and universities; and other utilities and community water and wastewater systems. It also provides water and wastewater services on military installations; and undertakes contracts with municipal customers, primarily to operate and manage water and wastewater facilities, as well as offers other related services. In addition, the company operates approximately 80 surface water treatment plants; 540 groundwater treatment plants; 175 wastewater treatment plants; 53,700 miles of transmission, distribution, and collection mains and pipes; 1,200 groundwater wells; 1,700 water and wastewater pumping stations; 1,100 treated water storage facilities; and 74 dams. The company was founded in 1886 and is headquartered in Camden, New Jersey.

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.

Sterling Infrastructure, Inc. engages in the provision of e-infrastructure, transportation, and building solutions primarily in the United States. It operates through three segments: E-Infrastructure Solutions, Transportation Solutions, and Building Solutions. The E-Infrastructure Solutions segment provides site development services for the blue-chip end users in the e-commerce distribution center, data center, manufacturing, warehousing, and power generation sectors. The Transportation Solutions segment is involved in the development of infrastructure and rehabilitation projects for highways, roads, bridges, airports, ports, rail, and storm drainage systems for the departments of transportation in various states, regional transit authorities, airport authorities, port authorities, water authorities, and railroads. The Building Solutions segment provides residential and commercial concrete foundations for single-family and multi-family homes, parking structures, elevated slabs, other concrete work for developers and general contractors, as well as provides plumbing services for residential builds. The company was formerly known as Sterling Construction Company, Inc. and changed its name to Sterling Infrastructure, Inc. in June 2022. Sterling Infrastructure, Inc. was founded in 1955 and is headquartered in The Woodlands, Texas.

American States Water Company, through its subsidiaries, provides water and electric services to residential, commercial, industrial, and other customers in the United States. It operates through three segments: Water, Electric, and Contracted Services. The company purchases, produces, distributes, and sells water, as well as distributes electricity. As of December 31, 2022, American States Water Company provided water service to 263,265 customers located throughout 10 counties in the State of California; and distributed electricity to 24,705 customers in San Bernardino County mountain communities in California. The company also provides water and/or wastewater services, including the operation, maintenance, and construction of facilities at the water and/or wastewater systems at various military installations. American States Water Company was incorporated in 1929 and is headquartered in San Dimas, California.

SJW Group, through its subsidiaries, provides water utility and other related services in the United States. It operates in Water Utility Services and Real Estate Services segments. The company engages in the production, purchase, storage, purification, distribution, wholesale, and retail sale of water and wastewater services; and supplies groundwater from wells, surface water from watershed run-off and diversion, reclaimed water, and imported water purchased from the Santa Clara Valley Water District. It also offers non-tariffed services, including water system operations, maintenance agreements, and antenna site leases; contracted services, sewer operations, and other water related services to water utilities; and a Linebacker protection plan for public drinking water customers in Connecticut and Maine. In addition, the company provides water service to approximately 232,400 connections that serve approximately one million people residing in portions of the cities of San Jose and Cupertino and in the cities of Campbell, Monte Sereno, Saratoga, and the Town of Los Gatos; adjacent unincorporated territories in the County of Santa Clara in the State of California; water service to approximately 141,000 service connections, which serve approximately 461,000 people in 81 municipalities with a service area of approximately 272 square miles in Connecticut and Maine and approximately 3,000 wastewater connections in Southbury, Connecticut; approximately 28,000 service connections that serve approximately 83,000 people in a service area comprising approximately 271 square miles in the region between San Antonio and Austin, Texas; and approximately 950 wastewater connections. Further, it owns undeveloped land in California and Tennessee; commercial and warehouse properties in Tennessee; and commercial properties and parcels of land in Connecticut. The company was formerly known as SJW Corp. and changed its name to SJW Group in November 2016. SJW Group was incorporated in 1985 and is headquartered in San Jose, California.

Select Water Solutions, Inc., together with its subsidiaries, provides water management and chemical solutions to the energy industry in the United States. The company operates through three segments: Water Services, Water Infrastructure, and Chemical Technologies. The Water Services segment provides water-related services, including water sourcing, water transfer, flowback and well testing, water containment, fluids hauling, water monitoring, and water network automation; technology solutions comprising hydrographic mapping, water volume and quality monitoring, remote pit and tank monitoring, leak detection, asset and fuel tracking, and automated-equipment services, as well as various surface rental equipment and workforce accommodation services. The Water Infrastructure segment engages in the recycling, gathering, transferring, and disposal of water through a network of permanent pipeline infrastructure, semi-permanent pipeline infrastructure, water recycling facilities, earthen pits, water sources, and SWDs; provides solids management services; and develops, builds, and operates semi-permanent and permanent infrastructure solutions. The Chemical Technologies segment provides technical solutions, products, and services related to chemical applications in the oil and gas industry. This segment develops, manufactures, and manages logistics; and provides chemicals used in hydraulic fracturing, stimulation, cementing, and well completions for pressure pumpers and oil and gas producers, as well as offers production chemical solutions for underperforming wells, corrosion and scale monitoring, chemical inventory management, well failure analysis, and lab services. It primarily serves oil and gas producers. The company was formerly known as Select Energy Services, Inc. and changed its name to Select Water Solutions, Inc. in May 2023. Select Water Solutions, Inc. was incorporated in 2016 and is headquartered in Houston, Texas.

Cadiz Inc., together with its subsidiaries, provides water solutions in the United States. The company operates through Land and Water Resources; and Water Filtration Technology segments. It offers water supply, water storage, water conveyance, and water filtration services. In addition, the company is involved in the cultivation of grain crops and alfalfa, as well as provides water filtration solutions for impaired or contaminated groundwater sources. It serves public water systems, government agencies, and other clients. Cadiz Inc. was founded in 1983 and is based in Los Angeles, California.

INNOVATE Corp., through its subsidiaries, operates in infrastructure, life sciences, and spectrum areas in the United States. The Infrastructure segment provides industrial construction, structural steel, and facility maintenance services, such as fabrication and erection of structural steel and heavy steel plate services, and large-diameter water pipes and water storage tanks; fabrication of trusses and girders; and 3-D building information modeling and detailing for commercial, industrial, and infrastructure construction projects, such as buildings and office complexes, hotels and casinos, convention centers, sports arenas and stadiums, shopping malls, hospitals, dams, bridges, mines, metal processing, refineries, pulp and paper mills, and power plants. This segment also offers solutions for digital engineering, modeling and detailing, construction, and heavy equipment installation and facility services including maintenance, repair, and installation; and manufactures pollution control scrubbers, tunnel liners, pressure vessels, strainers, filters, separators, and customized products. The Life Sciences segment develops products to treat early osteoarthritis of the knee; and aesthetic and medical technologies for the skin. The Spectrum segment operates over-the-air broadcasting stations across the United States; and Azteca America, a Spanish-language broadcast network. The company was formerly known as HC2 Holdings, Inc. and changed its name to INNOVATE Corp. in September 2021. The company was incorporated in 1994 and is headquartered in New York, New York.