Contact Us
The Linn Group, Inc.
Chicago Board of Trade
141 W. Jackson Blvd, 1220A
Chicago, IL 60604
Main Email: LinnGroup@linngroup.com
Phone: General and Support: 800-548-5580
Open an account: 800-254-1753 / Fax: 312-896-2050
Support Email: helpdesk@linngroup.com