| Business | Phone |
| Duke Energy Trading & Mktng 8910 Purdue Rd, Indianapolis 46268 | (317) 879-3024 |
| Ems 3905 Vincennes Rd # 303, Indianapolis 46268 | (317) 471-3533 |
| Energy Systems Co 4414 W Washington St, Indianapolis 46241 | (317) 390-1752 |
| Viastar Energy 8888 Keystone Xing, Indianapolis 46240 | (317) 819-0881 |