NAICS 221118:
Other Electric Power Generation
This U.S. industry comprises establishments primarily engaged in operating electric power generation facilities (except hydroelectric, fossil fuel, nuclear, solar, wind, geothermal, biomass). These facilities convert other forms of energy, such as tidal power, into electric energy. The electric energy produced in these establishments is provided to electric power transmission systems or to electric power distribution systems.
Matching SIC code: 4911 Electric Services (also 4931 Electric and Other Services Combined, 4939 Combination Utilities, Not Elsewhere Classified)
Where it sits
- 22UtilitiesSector
- 221UtilitiesSubsector
- 2211Electric Power Generation, Transmission and DistributionIndustry group
- 22111Electric Power GenerationNAICS industry
- 221118Other Electric Power GenerationNational industry
Largest companies with NAICS 221118
Updated Nov 9, 2026| Rank | Company | Headquarters | Employees |
|---|---|---|---|
| 1 |  NextEra Energy Resourcesnexteraenergyresources.com | North Palm Beach, US | 6K |
| 2 |  ENGIE North America Inc.engieresources.com | Houston, US | 3.3K |
| 3 |  Energy Northwestenergy-northwest.com | Richland, US | 1.1K |
| 4 |  LS Powerlspower.com | New York, US | 629 |
| 5 |  Eon Energyeonenergyllc.com | Phoenix, US | 488 |
| 6 |  Southern Powersouthernpowercompany.com | Birmingham, US | 448 |
| 7 |  ON.energyon.energy | Miami, US | 339 |
| 8 |  Voltusvoltus.co | San Francisco, US | 308 |
| 9 |  Geronimo Powergeronimopower.com | Minneapolis, US | 307 |
| 10 |  Jupiter Powerjupiterpower.io | Austin, US | 271 |
Not this code?
Similar activities the Census classifies elsewhere.
- 562213Solid Waste Combustors and IncineratorsOperating trash disposal incinerators that also generate electricity
Questions about NAICS 221118
What SIC code matches NAICS 221118?
How many companies have NAICS 221118?
Code titles, definitions, examples and SIC matches: NAICS 2022 and the Census concordances, US Census Bureau. Company counts and lists: Crustdata, companies with a website, each by its primary code, updated weekly. Employee counts are estimates.