The retail energy markets have been quite volatile over the past few years. With natural gas prices ranging from  $1.60 to over $7.00/MMbtu in the course of a year, it has been challenging to remain competitive and profitable for many energy companies. In fact, companies that took the wrong positions in the wholesale energy market prior to this volatility were wiped out completely and are now exiting the market. This article outlines the top fifteen largest electricity suppliers in the U.S., their revenues, and employee count.

The Top Electricity Companies In The United States.

If you’re wondering who the top electricity suppliers and utility companies are in the United States, you’ve come to the right place. There are many benefits to working with a top energy company for your business. First, since most of these companies are publicly traded, you know that their supply contracts are valid and do not contain some sort of fine print to take advantage of you or your business. Furthermore, many of these companies offer hybrid, custom energy supply products that could be of benefit to you based on how you consume energy. Here is a list of the top 10 energy companies in the United States serving customers in deregulated markets.

The Top 15 List Of Energy Companies By Revenue.

1. Constellation – $9.5 Billion

Constellation is an energy company located in Baltimore, Maryland whose current structure was founded in 2022 after splitting off from its former parent, Exelon. 

  • Employee Count: 11,000+ 
  • Annual kWh: 122.9 billion
  • Customer Count: 1.4 million

2. NRG – $5.4 Billion

NRG was founded in 1989 and is headquartered in Houston, TX. Recently, NRG has acquired many other electric retail suppliers including Direct Energy, Reliant Energy, XOOM Energy, Green Mountain Energy, Stream Energy, Discount Power, and Cirro Energy. 

  • Employee Count: 18,000+ 
  • Annual kWh: 63.8billion
  • Customer Count: 1.5 million

3. Vistra Energy- $3.1 Billion

Vistra Energy is a large energy company with several electric supplier subsidiaries. Headquartered in Irving, Texas Vistra is on the Fortune 275 list of companies with revenues in excess of 3 billion dollars annually. 

  • Employee Count: 4,900+ 
  • Annual kWh: 56.3 billion
  • Customer Count: 2 million

4. Calpine Energy – $2.74 Billion

Calpine Energy is headquartered in Houston, Texas, and is one of the largest American energy companies today. Calpine is involved in both the wholesale and retail electricity markets and serves customers in 23 U.S. states and Canada. The company owns over 78 power plants that generate 26,000 megawatts of electricity.

  • Employee Count: 2,200+ 
  • Annual kWh: 32.4 billion
  • Customer Count: 1,070

5. ENGIE – $2.1 Billion

ENGIE is another French company involved in the electricity and natural gas industry. ENGIE’s operations include electricity generation, electricity distribution, renewable energy, nuclear energy, and natural gas. =

  • Employee Count: 160,000+ 
  • Annual kWh: 29.5 billion
  • Customer Count: 46,000

6. Energy Harbor – $2 Billion (Acquired by Vistra Energy in March 2024)

Energy Harbor was an electric supplier affiliate of First Energy Corporation, a public electric utility. The company was acquired by Vistra Energy in March 2024, and currently operates in all deregulated states and operates the second largest non-regulated nuclear fleet in the country, supplying 33 terawatts of electricity. The company is headquartered in Akron, Ohio.

7. EDF – $1.4 Billion

EDF, formally known as Électricité de France S.A., is a France-based energy company that operates internationally in Europe, South America, North America, Asia, the Middle East, and Africa. 

  • Employee Count: 165,000+ 
  • Annual kWh: 18.2 billion
  • Customer Count: 46,000

8. AEP – $1.4 Billion

American Electric Power (AEP) is both a public electric utility and an electricity generation supplier. 

  • Employee Count: 17,000+ 
  • Annual kWh: 22.54 billion
  • Customer Count: 492,000

9. WGL Energy – $762 Million

WGL is a public holding company serving more than one million customers in Maryland, Virginia, and Washington DC. The company employs over 1,400 people and is involved in the electricity, natural gas, and renewable energy sectors. 

  • Employee Count: 1,400+ 
  • Annual kWh: 11.1 billion
  • Customer Count: 84,000

10.Interstate Gas Supply, Inc. – $675 Million

Interstate Gas Supply (IGS) is a leading independent supplier of natural gas and electricity, providing innovative energy solutions to residential, commercial, and industrial customers. Founded in 1989, IGS is committed to offering sustainable and cost-effective energy options, including renewable energy and carbon-neutral products.

  • Annual kWh: 9.2 billion
  • Customer Count: 307,000

11. Shell Energy North America (US), L.P. – $572 Million

Shell Energy North America is a prominent player in the electricity retail markets, supplying power to residential, commercial, and industrial customers across the United States. They focus on providing a range of energy solutions, including renewable energy options, to help customers manage their energy needs efficiently and sustainably.

  • Annual kWh: 8.4 billion
  • Customer Count: 185

12. NextEra – $536 Million

Headquartered in Juno Beach, FL, NextEra Energy is the parent company of Florida Power & Light and is currently the largest electric utility holding company. 

  • Employee Count: 14,000+ 
  • Annual kWh: 5.8 billion
  • Customer Count: 150,000

13. MP2 Energy LLC – $533 Million

MP2 Energy, a Shell Energy North America subsidiary, specializes in providing comprehensive retail electricity services and energy solutions to commercial, industrial, and residential customers. Known for its innovative approach, MP2 Energy offers customized energy management strategies, including renewable energy options and demand response programs, to optimize energy usage and cost savings.

  • Annual kWh: 7.6 billion
  • Customer Count: 17,400

14. MidAmerican Energy Services, LLC – $414 Million

MidAmerican Energy Services is a leading energy provider, offering electricity and natural gas solutions to residential, commercial, and industrial customers across the Midwest and other parts of the United States. With a focus on reliability and customer satisfaction, MidAmerican Energy Services delivers tailored energy plans and competitive pricing to meet diverse energy needs.

  • Annual kWh: 5.8 billion
  • Customer Count: 19,000

15. Freepoint Energy Solutions LLC – $334 Million

Freepoint Energy Solutions is a dynamic retail energy provider offering electricity and natural gas services to commercial and industrial customers across the United States. They are known for their flexible energy plans, competitive pricing, and commitment to sustainability, helping businesses optimize their energy consumption and reduce costs.

  • Annual kWh: 5.3 billion
  • Customer Count: 8,000

Looking For The Right Retail Electric Supplier?

As one of the nation’s leading energy brokerage firms, Diversegy is proud to have relationships with the top energy companies in the country. In fact, on a regular basis, we negotiate and structure electricity and natural gas supply contracts from these suppliers on behalf of our customers. If you are looking for a supplier that can offer you the best energy supply plan for your business, you’ve come to the right place. Contact us today to learn more.

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