Spark Energy, LP
Retail Power Marketer electric utility · Texas · #462 of 3,199 U.S. utilities by customers · EIA utility #17710
Spark Energy, LP is a retail power marketer electric utility serving 36,016 customers in Delaware, Illinois, Maryland, Texas. In 2025 it sold 435 gigawatt-hours of electricity for $77.34M in revenue, an average realized rate of 17.77¢ per kWh across all customer classes and 17.80¢ per kWh for residential customers. EIA records its activities as: retail marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 34,911 | 410 | $72.98M | 17.80¢ | |
| Commercial | 1,105 | 25.2 | $4.36M | 17.30¢ | |
| Total | 36,016 | 435 | $77.34M | 17.77¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (979 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Texas | 21,703 | 333 | 17.42¢ |
| Illinois | 13,252 | 88.5 | 19.60¢ |
| Delaware | 692 | 7.5 | 14.44¢ |
| Maryland | 369 | 6.5 | 16.06¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 85,209 | 923 | $111.27M | 12.01¢ |
| 2022 | 63,979 | 871 | $122.45M | 14.01¢ |
| 2023 | 49,843 | 589 | $92.89M | 15.71¢ |
| 2024 | 41,928 | 488 | $82.44M | 16.89¢ |
| 2025 | 36,016 | 435 | $77.34M | 17.80¢ |
Energy supply (2025)
Net generation: — GWh
Wholesale power purchased: 459 GWh
Winter peak demand: — MW
Energy losses: 5.2% of energy handled
Other large utilities in Texas
- TXU Energy Retail Co, LLC - 1,867,539 customers, residential 19.36¢
- Reliant Energy Retail Services - 1,646,366 customers, residential 18.38¢
- City of San Antonio - (TX) - 986,641 customers, residential 12.40¢
- Austin Energy - 577,889 customers, residential 13.14¢
- Entergy Texas Inc. - 531,824 customers, residential 13.89¢
- Pedernales Electric Coop, Inc - 474,954 customers, residential 12.75¢
- Just Energy - 474,201 customers, residential 16.82¢
- El Paso Electric Co - 470,748 customers, residential 13.01¢
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #17710 in the EIA frame.