| Business | Phone |
| Abbotly Technologies 1701 N Greenville Ave 800, Richardson 75081 | (972) 994-0055 |
| Energy Systems North America 701 N Glenville Dr, Richardson 75081 | (972) 367-4300 |
| Heights Energy Inc 1600 Promenade Shopping Ctr, Richardson 75080 | (972) 231-7800 |
| Hi Tech Energy Group 1202 Richardson Dr, Richardson 75080 | (469) 916-4970 |
| International Energy Ntwrk Oil 1202 Richardson Dr 309, Richardson 75080 | (469) 916-4975 |
| Synergy Energy Inc 1701 N Greenville Ave, Richardson 75081 | (972) 235-9620 |