| Business | Phone |
| Nordic Energy 7027 Belgold St, Houston 77066 | (281) 444-0434 |
| Aggreko International Power 2 Northpoint Dr 810, Houston 77060 | (281) 848-1400 |
| Amigo Energy 2650 Fountain View Dr, Houston 77057 | (832) 242-7168 |
| Arena Power Co 6200 Savoy Dr, Houston 77036 | (713) 532-5244 |
| Avis Electric Contracting 3365 Maroneal St, Houston 77025 | (713) 663-7585 |
| Avis Electric Svc Inc 3029 Blue Bonnet Blvd, Houston 77025 | (713) 663-7585 |
| Ball Electric Co 316 W 24th St, Houston 77008 | (713) 864-8336 |
| Basler Electric Co 3300 S Gessner Rd, Houston 77063 | (713) 914-0833 |
| Boldwater Brokers 6363 Woodway Dr # 415, Houston 77057 | (832) 251-8750 |
| Calpine Corp 700 Louisiana St, Houston 77002 | (713) 632-1050 |
| Center Point Energy 13330 W Bellfort Ave, Houston 77099 | (281) 530-3450 |
| Center Point Energy Inc 1111 Louisiana St, Houston 77002 | (713) 207-1111 |
| Cirro Energy 11011 Brooklet Dr, Houston 77099 | (832) 328-1494 |
| Cobisa Corp 820 Gessner Rd 930, Houston 77024 | (713) 932-8070 |
| Constellation New Energy Inc 1301 Mckinney St, Houston 77010 | (713) 222-6080 |
| Herbst & Assoc Mfr Rprsnttv 17717 Red Oak Dr, Houston 77090 | (281) 440-6090 |
| Direct Energy 8 E Greenway Plz 1000, Houston 77046 | (832) 476-2450 |
| E C Power 5120 Woodway Dr, Houston 77056 | (713) 626-8700 |
| E X Electrical Sales 951 Wax Myrtle Ln, Houston 77079 | (713) 827-7343 |
| Entergy Corp 1401 Rusk St, Houston 77002 | (713) 315-5200 |
| Entergy Corp 20 E Greenway Plz 1025, Houston 77046 | (832) 681-3000 |
| Franklin Power Co 14550 Torrey Chase Blvd, Houston 77014 | (281) 440-6363 |
| Gexa Corp 20 E Greenway Plz 600, Houston 77046 | (713) 961-9399 |
| Masters Unlimited Inc 5510 Norments St, Houston 77039 | (281) 449-2429 |
| M Power Energy Svc Llc 1221 Mckinney St, Houston 77010 | (832) 200-5630 |
| Houston Industries Energy Inc 1111 Louisiana St, Houston 77002 | (713) 207-5595 |
| Houston Power & Energy 11600 Jones Rd, Houston 77070 | (281) 894-8082 |
| Kma Electric Inc 5411 Killough St A, Houston 77086 | (281) 447-7491 |
| Lakey Electric 5730 Teague Rd, Houston 77041 | (713) 460-5882 |
| National Power Svc 11500 Northwest Fwy, Houston 77092 | (713) 682-7722 |