The 100 largest Utilities companies in the United States (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Dominion Energy dominionenergy.com A company headquartered in Richmond, Va, providing electricity and natural gas to 7 million customers in 15 states with a focus on sustainability and safety	Utilities	🇺🇸 Richmond	27,676	n/a
2	Duke Energy Corporation duke-energy.com Electric and natural gas utilities serving millions, focusing on clean energy transition, grid upgrades, and net-zero emissions goals.	Utilities	🇺🇸 Charlotte	25,788	n/a
3	Pacific Gas and Electric Company pge.com Transmission and delivery of natural gas and electricity to approximately 15 million customers across a large service area in California.	Utilities	🇺🇸 Oakland	23,550	n/a
4	Exelon exeloncorp.com A leading utility company providing reliable and affordable energy to over 10 million customers in urban areas across multiple states, with a commitment to sustainability and community support	Utilities	🇺🇸 Chicago	20,291	n/a
5	Constellation constellationenergy.com Leader in clean energy production and services, accelerating transition to carbon-free future through diverse energy portfolio, sustainability initiatives, and technology investments	Utilities	🇺🇸 Baltimore	13,291	n/a
6	American Electric Power aep.com The company is focused on reducing carbon footprint, empowering communities, developing workforce, shifting to clean energy sources, and building stronger communities for the future	Utilities	🇺🇸 Columbus	13,166	n/a
7	Southern California Edison (SCE)sce.com A leading electric utility in Southern California focused on bringing clean and renewable energy sources to reduce emissions and promote innovation	Utilities	🇺🇸 Rosemead	12,652	1886
8	NextEra Energy, Inc.nexteraenergy.com Leading electric utility company providing reliable electricity to millions, developing diverse energy sources including natural gas, nuclear, renewables, and battery storage.	Utilities	🇺🇸 Juno Beach	12,649	n/a
9	Westinghouse Electric Company westinghousenuclear.com Global leader in providing safe and innovative nuclear technology, offering reliable power plants, fuel, automation, and services with a focus on safety and sustainability	Utilities	🇺🇸 Cranberry Township	12,455	n/a
10	Entergy entergy.com This company provides safe, affordable, and reliable energy to the Middle South region, with a focus on clean power generation and community impact	Utilities	🇺🇸 New Orleans	12,253	1913
11	Xcel Energy my.xcelenergy.com providing reliable, resilient, and sustainable energy services to customers across eight states, focusing on excellent service and growth opportunities	Utilities	🇺🇸 Minneapolis	12,073	n/a
12	Southern Company southerncompany.com A company and its subsidiaries provide clean, safe, reliable energy to 9 million customers with a focus on service excellence, community value, and net zero emissions by 2050	Utilities	🇺🇸 Atlanta	12,062	n/a
13	Con Edison coned.com Providing reliable electricity to millions, focusing on clean energy transition, energy efficiency, and infrastructure resilience against extreme weather.	Utilities	🇺🇸 New York	9,822	n/a
14	DTE Energy dteenergy.com Provides diversified energy solutions including renewable energy, emission control technologies, and energy services primarily serving Michigan communities.	Utilities	🇺🇸 Detroit	9,635	n/a
15	Tennessee Valley Authority tva.com A self-financing government-owned power provider focusing on delivering affordable electricity, environmental stewardship, and economic development in the Tennessee Valley region	Utilities	🇺🇸 Knoxville	8,616	1933
16	PSEG landing.pseg.com Delivering electricity and gas services to millions of customers in New Jersey and Long Island, while prioritizing sustainability, community investment, and workforce development	Utilities	🇺🇸 Newark	8,371	1903
17	Eversource Energy jobs.eversource.com A Fortune 500 energy company in New England, prioritizing safety, reliability, environmental leadership, and energy options for millions of customers	Utilities	🇺🇸 Hartford	8,353	n/a
18	Florida Power & Light fpl.com Leading electric utility in America, providing affordable, reliable, and clean electricity to over 12 million people in Florida Recognized for exceptional reliability	Utilities	🇺🇸 Juno Beach	7,783	1925
19	NRG Energy nrg.com Provides innovative natural gas, electricity, and smart home energy solutions to a diverse range of customers across North America.	Utilities	🇺🇸 Houston	7,492	1989
20	Schweitzer Engineering Laboratories (SEL)selinc.com The company provides products and services for power system protection, monitoring, control, automation, communications, and metering with a focus on safety, reliability, and cost-effectiveness	Utilities	🇺🇸 Pullman	7,267	1982
21	PPL Corporation pplweb.com Providing electricity to millions, building smarter, resilient power grids, advancing sustainable energy solutions, and fostering inclusive work environments.	Utilities	🇺🇸 Allentown	7,118	1920
22	Avangrid avangrid.com A leading sustainable energy company with a focus on transitioning America to a clean future through its Networks and Renewables businesses	Utilities	🇺🇸 Orange	7,096	n/a
23	CenterPoint Energy centerpointenergy.com An investor-owned energy delivery company with operations in electric transmission, power generation, and natural gas distribution serving over 7 million customers	Utilities	🇺🇸 Houston	7,080	1866
24	Ameren ameren.com A Fortune 500 company based in St Louis, providing electric and natural gas services to millions of customers in Illinois and Missouri	Utilities	🇺🇸 St. Louis	7,078	1902
25	FirstEnergy firstenergycorp.com Forward-thinking electric utility dedicated to safety, reliability, and operational excellence Serving customers in multiple states with transmission lines connecting regions	Utilities	🇺🇸 Akron	6,901	1997
26	Consumers Energy careers.consumersenergy.com Consumers Energy is Michigan's energy provider offering careers in a dynamic industry focused on safe, efficient, and sustainable energy generation	Utilities	🇺🇸 Jackson	6,839	1886
27	NiSource nisource.com A utility company serving 4 million customers across 6 states with safe, reliable, and affordable gas and electric services, investing in infrastructure for the future	Utilities	🇺🇸 Merrillville	6,597	n/a
28	NextEra Energy Resources jobs.nexteraenergy.com Development and operation of renewable, battery storage, natural gas, nuclear power, transmission assets, retail energy solutions, and integrated energy services.	Utilities	🇺🇸 Juno Beach	6,274	2000
29	The AES Corporation aes.com Energy company focused on innovative, customized solutions for organizations with a collaborative approach, empowering growth and driving impact in the energy sector	Utilities	🇺🇸 Arlington	5,910	1981
30	Itron, Inc.na.itron.com This company enables utilities and cities worldwide to deliver critical infrastructure services through smart networks, software, meters, and sensors for energy and water management	Utilities	🇺🇸 Liberty Lake	5,820	1977
31	Georgia Power Company georgiapower.com A leading energy company dedicated to providing reliable, affordable, and clean energy to millions of customers while giving back to the community	Utilities	🇺🇸 Atlanta	5,448	1883
32	Salt River Project srpnet.com Providing essential water and power services to the Phoenix area with a focus on customer satisfaction and innovative technology.	Utilities	🇺🇸 Tempe	5,372	1903
33	ComEd comed.com The company provides electricity to over 4 million customers in northern Illinois, focusing on safety, reliability, innovation, and customer empowerment	Utilities	🇺🇸 Chicago	5,359	n/a
34	USIC usicllc.com A leading provider of underground utility damage prevention services and utility solutions in the United States and Canada	Utilities	🇺🇸 Indianapolis	5,331	n/a
35	UGI Corporation ugicorp.com An international energy distribution and services company focusing on delivering energy products, providing great service, serving communities, and delivering value to investors	Utilities	🇺🇸 King of Prussia	5,226	1882
36	Bitcoin Inc. The company develops tools, products, and services based on Bitcoin’s open source technology to serve individuals, institutions, and the global community	Utilities	🇺🇸 Las Vegas	5,151	2011
37	Los Angeles Department of Water and Power ladwp.com Provide safe, reliable water and electricity services to millions of residents and businesses in Los Angeles, ensuring municipal utility needs.	Utilities	🇺🇸 Los Angeles	4,862	1902
38	Ambit Energy ambitenergy.com An energy provider offering electricity, gas, and solar services nationwide through a network of independent consultants committed to exceptional customer care	Utilities	🇺🇸 Irving	4,794	2006
39	Atmos Energy atmosenergy.com Safe, reliable, and affordable natural gas delivery to over 3 million customers across eight southern states with modern infrastructure.	Utilities	🇺🇸 Dallas	4,769	1906
40	Oncor Electric Delivery oncor.com Regulated electricity distribution and transmission company operating the largest system in Texas, delivering power to nearly 4 million customers.	Utilities	🇺🇸 Dallas	4,068	n/a
41	SoCalGas socalgas.com Largest gas distribution utility serving over 21 million consumers across Central and Southern California with safe, reliable, affordable energy.	Utilities	🇺🇸 Los Angeles	3,699	n/a
42	American Water amwater.com Providing safe, clean, reliable, and affordable drinking water and wastewater services to over 14 million people across multiple states.	Utilities	🇺🇸 Camden	3,399	1886
43	TECO Energy tecoenergy.com Holding company operating regulated electric and gas utilities serving hundreds of thousands of customers in Florida and New Mexico.	Utilities	🇺🇸 Tampa	3,301	n/a
44	OVO company.ovo.com energy company focused on fair, green, and simple services, committed to net zero carbon and supporting climate education and action	Utilities	🇺🇸 Bristol	3,178	2009
45	Aqua aquawater.com Providing water and wastewater services to over 3 million people across multiple U.S. states with a focus on safety and integrity.	Utilities	🇺🇸 Bryn Mawr	3,174	n/a
46	AWP Safety awpsafety.com A leading provider of professional traffic management and protection services, offering work zone flagging, design, engineering, equipment sales, rental, and support	Utilities	🇺🇸 North Canton	3,152	1981
47	Puget Sound Energy pse.com A longstanding energy provider in Washington state serving over 11 million electric customers and 800,000 natural gas customers across 10 counties Visit psecom for more information	Utilities	🇺🇸 Bellevue	3,123	1873
48	Arizona Public Service - APS aps.com Arizona's largest and longest serving electric utility, providing power to nearly 12 million customers in 11 counties with a focus on sustainability and customer satisfaction	Utilities	🇺🇸 Phoenix	3,112	1886
49	WEC Energy Group wecenergygroup.com Provides electric and natural gas services to millions of customers across multiple states, focusing on reliability, customer care, and operational efficiency.	Utilities	🇺🇸 Milwaukee	3,080	2015
50	Portland General Electric portlandgeneral.com Providing reliable energy services, supporting community resilience, addressing climate change, and driving clean energy transformation in Oregon's evolving energy landscape.	Utilities	🇺🇸 Portland	2,961	1889
51	PacifiCorp pacificorp.com A leading western US energy services provider, PacifiCorp serves 2 million customers with renewable resources and a focus on a lower carbon future	Utilities	🇺🇸 Portland	2,951	1910
52	ENTRUST Solutions Group entrustsol.com Providing engineering, consulting, and automation services to pipeline, utility, and industrial sectors with expertise in various areas across multiple office locations	Utilities	🇺🇸 Lisle	2,943	2002
53	We Energies we-energies.com A leading energy company serving over 11 million electric and natural gas customers in Wisconsin and Michigan, with a focus on reliability and customer satisfaction	Utilities	🇺🇸 Milwaukee	2,832	1896
54	San Diego Gas & Electric sdge.com provides clean, safe, and reliable energy to improve lives in San Diego and southern Orange counties with over 4,000 employees	Utilities	🇺🇸 San Diego	2,822	1881
55	Vistra Corp.vistracorp.com Leading integrated electricity provider offering reliable, affordable, and sustainable power generation and retail services across the United States.	Utilities	🇺🇸 Irving	2,731	1882
56	CPS Energy cpsenergy.com Community-owned provider delivering safe, reliable electric and natural gas services to San Antonio and surrounding counties with low customer rates.	Utilities	🇺🇸 San Antonio	2,699	1942
57	Osmose osmose.com Specializing in structural solutions, we ensure asset health and system performance by mitigating risks through innovative and reliable field services	Utilities	🇺🇸 Atlanta	2,683	1934
58	Alliant Energy alliantenergy.com Provides regulated electric and natural gas services to retail customers in Iowa and Wisconsin with focus on sustainability and community.	Utilities	🇺🇸 Madison	2,626	1917
59	Alabama Power Company alabamapower.com This company provides affordable, reliable electricity to 15 million homes, businesses, and industries in the southern two-thirds of Alabama	Utilities	🇺🇸 Birmingham	2,606	1906
60	Bonneville Power Administration bpa.gov A federal nonprofit wholesale power marketer selling carbon-free electricity, operating a high-voltage transmission grid, and funding a large fish and wildlife program in the Northwest region	Utilities	🇺🇸 Portland	2,596	1937
61	Sempra sempra.com A leading energy infrastructure company helping to electrify and decarbonize major markets in North America through sustainable practices and operational excellence	Utilities	🇺🇸 San Diego	2,572	n/a
62	PECO peco.com A historic company in the energy sector, dedicated to providing safe, reliable, affordable, and clean energy services while promoting environmental awareness and innovation	Utilities	🇺🇸 Philadelphia	2,481	1881
63	ONE Gas jobs.onegas.com A natural gas distribution company serving over 22 million customers in Kansas, Oklahoma, and Texas, with a focus on creating a respectful online community	Utilities	🇺🇸 Tulsa	2,413	2014
64	Calpine calpine.com A leading American electricity generator utilizing natural gas and geothermal resources, with a focus on clean, efficient power production for residential and commercial customers	Utilities	🇺🇸 Houston	2,343	1984
65	NAES naes.com A leading provider of operations, maintenance, construction, engineering and technical services for power generation industry, prioritizing safety, compliance, quality, and integrity	Utilities	🇺🇸 Issaquah	2,309	1980
66	MidAmerican Energy Company midamericanenergy.com Energy company serving over 15 million customers in Iowa, Illinois, Nebraska, and South Dakota, providing timely and relevant information on energy-related topics	Utilities	🇺🇸 Des Moines	2,295	n/a
67	New York Power Authority nypa.gov Largest state public power organization producing mostly clean hydropower, supporting jobs, promoting energy efficiency, and selling electricity to diverse customers.	Utilities	🇺🇸 White Plains	2,295	1931
68	CLEAResult clearesult.com Leading provider of energy efficiency and sustainability solutions in North America, focused on transitioning to a carbon-neutral future through local partnerships and innovative technology	Utilities	🇺🇸 Austin	2,266	2003
69	Black Hills Energy blackhillsenergy.com A vertically integrated energy enterprise serving 12 million utility customers in eight states, with non-regulated businesses in wholesale electricity and natural gas/coal production	Utilities	🇺🇸 Rapid City	2,220	1883
70	Southern Nuclear southernnuclear.com This company operates nuclear plants in Alabama and Georgia, including the first new nuclear units built in the US in 30 years	Utilities	🇺🇸 Birmingham	2,214	n/a
71	SMUD smud.org A community-owned electric service provider in Sacramento County, focused on low-cost, reliable electricity with innovative energy efficiency programs and sustainable solutions	Utilities	🇺🇸 Sacramento	2,209	1946
72	LCRA lcra.org A Texas-based organization providing essential services such as electric power generation, water management, public parks, and community development without state funding	Utilities	🇺🇸 Austin	2,192	1934
73	JEA jea.com A community-owned utility in Jacksonville, Florida providing electric, water, sewer, and reclaimed water services with a focus on safety, reliability, and customer satisfaction	Utilities	🇺🇸 Jacksonville	2,126	n/a
74	NV Energy nvenergy.com A Nevada-based energy holding company serving residents and tourists with a wide range of energy services and products Connect on social media	Utilities	🇺🇸 Las Vegas	2,114	1906
75	Direct Energy directenergy.com Retail provider of electricity, natural gas, and energy-related services for homes and businesses across North America, offering various plans.	Utilities	🇺🇸 Houston	2,095	2000
76	EPRI epri.com A global energy research and development organization driving innovation for clean, safe, reliable, affordable electricity access worldwide	Utilities	🇺🇸 Palo Alto	2,092	1972
77	Omaha Public Power District oppd.com A public power utility passionate about providing affordable, reliable, and environmentally sensitive energy services to communities across 13 counties	Utilities	🇺🇸 Omaha	2,047	1946
78	Luminant luminant.com A competitive power generation business with nearly 17,000 MW in Texas, including nuclear and coal-fueled generation, as well as a large purchaser of wind-generated electricity	Utilities	🇺🇸 Dallas	2,026	n/a
79	Progress Energy progress-energy.com The merged company is the nation's largest utility, delivering affordable, reliable, and clean energy to 7 million customers with efficient operations and a consolidated online presence	Utilities	🇺🇸 Raleigh	2,015	1908
80	Just Energy justenergy.com A leading provider of simple and reliable energy services offering electricity, natural gas, and green energy options with competitive rates and rewards	Utilities	🇺🇸 Houston	1,983	1997
81	Southwest Gas Corporation swgas.com Engaged in purchasing, transporting, and distributing natural gas as the environmental fuel of choice to over two million customers in three states	Utilities	🇺🇸 Las Vegas	1,971	1931
82	Enercon Services, Inc.enercon.com Multi-discipline engineering and environmental services for power generation, transmission, renewable energy, microgrids, and industrial sectors with safety focus.	Utilities	🇺🇸 Kennesaw	1,942	1983
83	Conservice conservice.com This company is the largest utility management and billing provider in the US, specializing in sub-meters, resident billing, and utility invoice management	Utilities	🇺🇸 River Heights	1,942	2000
84	LADWP ladwp.com The company delivers water and electricity to over 38 million residents in Los Angeles, with a budget of billions for operations and capital projects	Utilities	🇺🇸 Los Angeles	1,940	1902
85	EthosEnergy ethosenergy.com Global services and tailored solutions for rotating equipment across power, oil, gas, industrial, and aerospace markets to ensure affordable and sustainable energy.	Utilities	🇺🇸 Houston	1,939	2014
86	Edison International edison.com A leading electric power generator and distributor, investing in renewable energy, infrastructure, and energy assets through its subsidiaries Based in California	Utilities	🇺🇸 Rosemead	1,900	n/a
87	Evergy linkedin.com The company delivers energy to communities in Kansas and Missouri, prioritizing sustainability, safety, and a people-first mindset to empower a better future	Utilities	🇺🇸 Kansas City	1,895	2018
88	OGE Energy Corp.oge.com Serving over 910,000 customers in Oklahoma and Arkansas, providing energy with focus on safety, innovation, and community improvement.	Utilities	🇺🇸 Oklahoma City	1,892	1902
89	Waste Pro USA wasteprousa.com A rapidly growing company in the solid waste industry, providing collection, recycling, processing, and disposal services across eight southeastern states	Utilities	🇺🇸 Longwood	1,869	2001
90	Pepco Holdings exeloncorp.com A major energy delivery company in the Mid-Atlantic region serving over 2 million customers with regulated electricity and natural gas services	Utilities	🇺🇸 Washington	1,868	n/a
91	SCANA Corporation scana.com A corporation providing electricity and natural gas to homes and businesses in South Carolina, North Carolina, and Georgia, supporting economic growth and local communities for over 160 years	Utilities	🇺🇸 Cayce	1,770	n/a
92	Memphis Light, Gas and Water (MLGW)mlgw.com A public power utility in Memphis and Shelby County providing electricity, natural gas, water services, and supporting local businesses through economic development initiatives	Utilities	🇺🇸 Memphis	1,760	1939
93	Colorado Springs Utilities csu.org largest community-owned utility providing electric, natural gas, water, and wastewater services, supporting community well-being and local businesses for 100 years	Utilities	🇺🇸 Colorado Springs	1,753	1922
94	PNM Resources txnmenergy.com Energy holding company providing electricity to over 720,000 homes and businesses in New Mexico and Texas through utilities.	Utilities	🇺🇸 Albuquerque	1,727	n/a
95	Hawaiian Electric hawaiianelectric.com A pioneering energy company in Hawaii with over 125 years of history, providing power to 95% of the state's residents on various islands	Utilities	🇺🇸 Honolulu	1,717	1891
96	LG&E and KU Energy LLC lge-ku.com A regulated utility company serving 12 million customers with over 8,000 MW generating capacity, providing reliable, safe, and competitively priced energy	Utilities	🇺🇸 Louisville	1,716	1913
97	CAMS camstex.com Provides disciplined asset management and operations services, maximizing clients' value through operational performance, commercial optimization, and financial controls A reputation for creativity and flexibility	Utilities	🇺🇸 Houston	1,712	2007
98	Metropolitan Water District of Southern California mwdh2o.com A cooperative serving 19 million people in six counties, importing water to supplement local supplies and promoting water conservation and resource management programs	Utilities	🇺🇸 Los Angeles	1,684	1928
99	Austin Energy austinenergy.com Providing affordable, reliable electric power to over 500,000 customers with strong focus on renewable energy and community engagement.	Utilities	🇺🇸 Austin	1,639	1895
100	Avista myavista.com Provider of energy services, electricity, and natural gas to customers in a service territory spanning 30,000 square miles across multiple states	Utilities	🇺🇸 Spokane	1,624	n/a

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 9, 2026.

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