| Business | Phone |
| American Trading Group 100 S Wacker Dr, Chicago 60606 | (312) 372-5930 |
| Botta Trading 440 S La Salle St 916, Chicago 60605 | (312) 260-5100 |
| G Barr Ltd Partnership 30 S Wacker Dr, Chicago 60606 | (312) 362-4260 |
| Bright Trading 440 S La Salle St, Chicago 60605 | (312) 362-3555 |
| Enriquez Trading Co 141 W Jackson Blvd # 2181, Chicago 60604 | (312) 786-1608 |
| Equitec Group 111 W Jackson Blvd, Chicago 60604 | (312) 692-7600 |
| Eckhardt Trading Co 53 W Jackson Blvd, Chicago 60604 | (312) 787-1107 |
| Chicago Trading & Arbitrage B 318 W Adams St, Chicago 60606 | (312) 236-0930 |
| D T Trading 141 W Jackson Blvd, Chicago 60604 | (312) 922-7047 |
| Cruz Trading Corp 141 W Jackson Blvd, Chicago 60604 | (312) 957-1320 |
| Gni Inc 141 W Jackson Blvd 20, Chicago 60604 | (312) 715-6101 |