| Business | Phone |
| Antero Resources 1660 17th St # 310, Denver 80202 | (303) 893-2343 |
| Duke Energy Merchants 9025 E Kenyon Ave, Denver 80237 | (303) 889-5973 |
| Dencor Energy Cost Controls 1450 W Evans Ave, Denver 80223 | (303) 922-1888 |
| Enduring Resources 475 17th St # 1500, Denver 80202 | (303) 573-1222 |
| Energy Acquisition Corp 1801 Broadway, Denver 80202 | (303) 298-0041 |
| Hat Resources 2800 S University Blvd # 82, Denver 80210 | (303) 759-9431 |
| Uranium Resources Inc 999 18th St, Denver 80202 | (303) 291-7550 |
| Tracker Resource Development 1050 17th St, Denver 80265 | (303) 534-9513 |
| Ultra Resources 1999 Broadway, Denver 80202 | (303) 295-0870 |
| Lake Fork Resources 1200 17th St, Denver 80202 | (303) 623-0984 |
| Lightly Treading Energy & Dsgn 4303 Brighton Blvd # 3, Denver 80216 | (303) 733-3078 |
| Sikkema & Assoc 2233 Eudora St, Denver 80207 | (303) 780-0409 |
| Metretek Technologies Inc 303 E 17th Ave # 660, Denver 80203 | (303) 785-8080 |
| Rule Resources Denver 80202 | (303) 575-1085 |
| San Juan Resources 1499 Blake St # 7k, Denver 80202 | (303) 573-6333 |
| Natuilus Resources 825 E Speer Blvd, Denver 80218 | (720) 570-3858 |
| Resources Unlimited 1291 S Pennsylvania St, Denver 80210 | (303) 282-8449 |