| Associated Electric Cooperative, Inc. | AECI | | Central | 5 | 3.9 GW | 370 GWh | Full |
| Avista Corporation | AVA | | Pacific | 6 | 2.1 GW | 8.6 TWh | Full |
| Avangrid Renewables, LLC | AVRN | | Pacific | 2 | — | — | Gen Only |
| Arizona Public Service Company | AZPS | | Arizona | 9 | 8.6 GW | 26.6 TWh | Full |
| Balancing Authority of Northern California | BANC | | Pacific | 3 | 4.5 GW | 17.4 TWh | Full |
| Black Hills Energy | BHBA | | Mountain | 3 | — | — | Subregions |
| Bonneville Power Administration | BPAT | | Pacific | 18 | 18.6 GW | 60.7 TWh | Full |
| Public Utility District No. 1 of Chelan County | CHPD | | Pacific | 4 | 292 MW | 7.3 TWh | Full |
| California Independent System Operator | CISO | | Pacific | 11 | 51.5 GW | 51.8 TWh | Subregions |
| Duke Energy Progress East | CPLE | | Eastern | 5 | 17.0 GW | 61.9 TWh | Full |
| Duke Energy Progress West | CPLW | | Eastern | 3 | — | — | Full |
| Arlington Valley, LLC | DEAA | | Arizona | 1 | — | — | Gen Only |
| PUD No. 1 of Douglas County | DOPD | | Pacific | 2 | 364 MW | 3.5 TWh | Full |
| Duke Energy Carolinas | DUK | | Eastern | 9 | 23.1 GW | 85.2 TWh | Full |
| El Paso Electric Company | EPE | | Arizona | 3 | 2.3 GW | 10.9 TWh | Full |
| Electric Reliability Council of Texas, Inc. | ERCO | | Central | 2 | 26.1 GW | 37.3 TWh | Subregions |
| Florida Municipal Power Pool | FMPP | | Eastern | 4 | 3.1 GW | 7.6 TWh | Full |
| Duke Energy Florida, Inc. | FPC | | Eastern | 7 | 9.9 GW | 43.6 TWh | Full |
| Florida Power & Light Co. | FPL | | Eastern | 8 | 29.7 GW | 145.6 TWh | Full |
| Public Utility District No. 2 of Grant County, Washington | GCPD | | Pacific | 4 | 1.0 GW | 7.9 TWh | Full |
| Gridforce Energy Management, LLC | GRID | | Pacific | 4 | — | — | Gen Only |
| Gainesville Regional Utilities | GVL | | Eastern | 2 | 405 MW | 1.8 TWh | Full |
| NaturEner Power Watch, LLC | GWA | | Mountain | 1 | — | — | Gen Only |
| City of Homestead | HST | | Eastern | 1 | 126 MW | -3 GWh | Full |
| Imperial Irrigation District | IID | | Pacific | 3 | 1.2 GW | 1.3 TWh | Full |
| Idaho Power Company | IPCO | | Pacific | 6 | 3.8 GW | 13.5 TWh | Full |
| ISO New England | ISNE | | Eastern | 3 | 19.5 GW | 4.4 TWh | Subregions |
| JEA | JEA | | Eastern | 3 | 2.6 GW | 11.8 TWh | Full |
| Los Angeles Department of Water and Power | LDWP | | Pacific | 6 | 6.9 GW | 19.9 TWh | Full |
| Louisville Gas and Electric Company and Kentucky Utilities Company | LGEE | | Eastern | 3 | 6.5 GW | 30.7 TWh | Full |
| Midcontinent Independent System Operator, Inc. | MISO | | Eastern | 10 | 119.2 GW | 415.1 TWh | Subregions |
| Nevada Power Company | NEVP | | Pacific | 6 | 9.2 GW | 21.8 TWh | Full |
| NorthWestern Corporation | NWMT | | Mountain | 7 | 2.2 GW | 4.4 TWh | Full |
| New York Independent System Operator | NYIS | | Eastern | 4 | 30.4 GW | 4.4 TWh | Subregions |
| PacifiCorp East | PACE | | Mountain | 7 | 1.5 GW | 859 GWh | Full |
| PacifiCorp West | PACW | | Pacific | 7 | 11.1 GW | 45.0 TWh | Full |
| Portland General Electric Company | PGE | | Pacific | 2 | 4.4 GW | 17.0 TWh | Full |
| PJM Interconnection, LLC | PJM | | Eastern | 7 | 134.4 GW | 104.4 TWh | Subregions |
| Public Service Company of New Mexico | PNM | | Arizona | 7 | 2.5 GW | 5.3 TWh | Subregions |
| Public Service Company of Colorado | PSCO | | Mountain | 3 | 8.6 GW | 25.0 TWh | Full |
| Puget Sound Energy, Inc. | PSEI | | Pacific | 5 | 3.8 GW | 14.3 TWh | Full |
| South Carolina Public Service Authority | SC | | Eastern | 5 | 8.3 GW | 20.4 TWh | Full |
| Dominion Energy South Carolina, Inc. | SCEG | | Eastern | 5 | 4.9 GW | 19.0 TWh | Full |
| Seattle City Light | SCL | | Pacific | 2 | 1.4 GW | 4.5 TWh | Full |
| Seminole Electric Cooperative | SEC | | Eastern | 4 | 3.8 GW | 3 GWh | Full |
| Southeastern Power Administration | SEPA | | Central | 4 | 85 MW | — | Gen Only |
| Sikeston Board Of Municipal Utilities | SIKE | | Central | 4 | — | — | Gen Only |
| Southern Company Services, Inc. - Trans | SOCO | | Central | 9 | 48.3 GW | 143.6 TWh | Full |
| Southwestern Power Administration | SPA | | Central | 4 | 178 MW | 1.6 TWh | Full |
| Salt River Project Agricultural Improvement and Power District | SRP | | Arizona | 6 | 8.3 GW | 32.7 TWh | Full |
| Southwest Power Pool | SWPP | | Central | 10 | 61.9 GW | 132.2 TWh | Subregions |
| Southwest Power Pool West Balancing Authority Area | SWPW | | Mountain | 7 | — | — | Subregions |
| City of Tallahassee | TAL | | Eastern | 2 | 594 MW | 3.0 TWh | Full |
| Tampa Electric Company | TEC | | Eastern | 4 | 4.3 GW | 20.3 TWh | Full |
| Tucson Electric Power | TEPC | | Arizona | 5 | 3.4 GW | 13.7 TWh | Full |
| Turlock Irrigation District | TIDC | | Pacific | 2 | 707 MW | 2.6 TWh | Full |
| City of Tacoma, Department of Public Utilities, Light Division | TPWR | | Pacific | 2 | 718 MW | 2.1 TWh | Full |
| Tennessee Valley Authority | TVA | | Central | 7 | 60.8 GW | 137.1 TWh | Full |
| Western Area Power Administration - Desert Southwest Region | WALC | | Arizona | 9 | 1.5 GW | 136 GWh | Full |
| Alcoa Power Generating, Inc. - Yadkin Division | YAD | | Eastern | 2 | — | — | Gen Only |