| Business | Phone |
| Alps Intl Management 141 W Jackson Blvd, Chicago 60604 | (312) 880-0800 |
| Chicago Stock Exchange 4507 N Magnolia Ave, Chicago 60640 | (773) 989-1540 |
| Kenwood Group 1 E Wacker Dr 1630, Chicago 60601 | (312) 828-1600 |
| National Stock Exchange 440 S La Salle St 2600, Chicago 60605 | (312) 786-8803 |
| Nabex Inc 100 N La Salle St, Chicago 60602 | (312) 595-9850 |
| Intercontinental Exchange Inc 55 W Monroe St 3430, Chicago 60603 | (312) 214-2010 |
| Chicago Trading Group 141 W Jackson Blvd 8, Chicago 60604 | (312) 379-5700 |
| Daw Trading 111 W Jackson Blvd, Chicago 60604 | (312) 386-9750 |
| Patrick Shea 141 W Jackson Blvd, Chicago 60604 | (312) 583-9028 |
| Wave Securities 440 S La Salle St 25, Chicago 60605 | (312) 442-7400 |
| Group Chicago Futures 1 S Wacker Dr, Chicago 60606 | (312) 263-3712 |
| Sangamon Trading 222 W Adams St, Chicago 60606 | (312) 920-0998 |
| Vankar Trading 20 W Kinzie St, Chicago 60610 | (312) 578-0225 |