| Business | Phone |
| A G Resource Co 200 W Jackson Blvd, Chicago 60606 | (312) 408-0045 |
| Alternative Resource Corp 311 W Washington St, Chicago 60606 | (312) 223-1297 |
| Pengo Products Co 5540 N Kedzie Ave, Chicago 60625 | (773) 588-5642 |
| American Land Resources 401 N Michigan Ave 1200, Chicago 60611 | (312) 840-8595 |
| Asset E Iii Inc 20 E Jackson Blvd, Chicago 60604 | (312) 663-9963 |
| Bioenergy 4250 N Milwaukee Ave, Chicago 60641 | (773) 283-1505 |
| Bracken Resources Inc 203 N La Salle St, Chicago 60601 | (312) 558-1624 |
| Calumet Energy Team Llc 11653 S Torrence Ave, Chicago 60617 | (773) 221-4198 |
| Cambridge Energy Group 360 E Randolph St, Chicago 60601 | (312) 863-4323 |
| Family Resource Ctr 1725 W Thorndale Ave, Chicago 60660 | (773) 271-1801 |
| People's Energy Svc 130 E Randolph St, Chicago 60601 | (630) 375-9775 |
| Cathy Melloan Resources Inc 1354 W Greenleaf Ave 3a, Chicago 60626 | (773) 973-4305 |
| Entech 8700 W Bryn Mawr Ave, Chicago 60631 | (773) 714-2350 |
| Energy Consultants 1666 W 104th Pl, Chicago 60643 | (773) 238-8638 |
| Energy Information & Mgmt Svc Chicago 60631 | (773) 594-1113 |
| Chesapeake Energy 100 N Riverside Plz, Chicago 60606 | (312) 756-1805 |
| Edge Technological Resources 7828 S Aberdeen St, Chicago 60620 | (773) 224-5366 |
| Dte Energy Svc 3430 S Federal St, Chicago 60616 | (312) 225-4535 |
| D R Balti Inc 2998 S Archer Ave 1, Chicago 60608 | (773) 847-2951 |