| CenterPoint Energy | 3,636 | 3,228,652 |
| DTE Energy | 2,589 | 2,264,340 |
| Omaha PPD | 2,432 | 374,831 |
| NV Energy | 1,988 | 1,431,000 |
| Philadelphia Electric Company | 1,678 | 1,689,178 |
| Oncor | 1,593 | 4,122,903 |
| HILCO Electric Cooperative | 1,591 | 36,107 |
| Florida Power & Light Company | 1,587 | 5,934,712 |
| Lubbock Power & Light System | 1,422 | 100,000 |
| Grand Haven | 1,162 | 15,168 |
| Cleco Power | 1,083 | 304,757 |
| American Electric Power Ohio | 944 | 1,517,294 |
| Consumers Energy | 862 | 1,975,539 |
| Clay Electric Coop | 836 | 198,133 |
| American Electric Power Texas | 814 | 1,094,735 |
| Medina Electric Cooperative | 742 | 39,426 |
| Duck River EMC | 673 | 85,167 |
| REA Energy | 616 | 26,570 |
| Alabama Power | 585 | 1,595,073 |
| Public Service Electric and Gas | 570 | 2,351,619 |
| Tampa Electric | 560 | 841,564 |
| Georgia Power | 546 | 2,755,616 |
| Pacific Gas and Electric Company | 532 | 5,500,000 |
| Portland General Electric | 480 | 429,390 |
| Southern California Edison | 469 | 5,000,000 |
| Commonwealth Edison Company | 456 | 4,088,413 |
| Baltimore Gas and Electric Company | 432 | 1,346,526 |
| Seattle City Light | 402 | 495,562 |
| CPS Energy | 367 | 969,781 |
| Sam Houston Electric Cooperative | 358 | 94,627 |
| PPL Electric Utilities | 357 | 1,944,856 |
| Appalachian Power Company | 356 | 544,427 |
| North Arkansas Electric Cooperative | 336 | 38,812 |
| Bluebonnet Electric Cooperative | 330 | 142,899 |
| EverSource | 324 | 1,446,877 |
| Northeast Oklahoma Electric Cooperative | 300 | 42,474 |
| National Grid | 261 | 1,378,132 |
| Public Service Enterprise Group Long Island | 251 | 1,162,294 |
| Salt River Project | 245 | 229,112 |
| Entergy | 242 | 457,687 |
| Lexington Electric System | 231 | 23,300 |
| Southern Pine Electric | 218 | 70,621 |
| Dixie Electric Membership Corporation | 217 | 118,528 |
| Rocky Mountain Power | 214 | 1,058,115 |
| Volunteer Energy Cooperative | 211 | 129,217 |
| NorthWestern Energy | 196 | 434,706 |
| New York State Electric and Gas | 189 | 1,338,863 |
| Public Service Company of Oklahoma | 183 | 570,718 |
| Central Hudson Gas & Electric Corp | 181 | 315,570 |
| Ameren | 180 | 1,254,087 |