| Business | Phone |
| Allegheny Interest Inc Corp 223 4th Ave # 700, Pittsburgh 15222 | (412) 201-3080 |
| Ardent Resources Inc 70 Fort Couch Rd, Pittsburgh 15241 | (412) 854-1193 |
| Cbe Inc 2652 Hidden Valley Rd # 103, Pittsburgh 15241 | (724) 942-4737 |
| Edgewood Energy Inc 422 Morris St, Pittsburgh 15218 | (412) 241-3233 |
| Linn Energy Llc 1700 N Highland Rd, Pittsburgh 15241 | (412) 854-0470 |
| Natural Energy Dev Corp 37 Mcmurray Rd # Ll1, Pittsburgh 15241 | (412) 833-8284 |
| Power Gas Marketing & Trnsmsn 707 Grant St # 32, Pittsburgh 15219 | (412) 258-3630 |
| Vista Resources Inc 61 Mcmurray Rd, Pittsburgh 15241 | (412) 833-8884 |