here is there web-site, which has barely nothin... http://www.kcco.com/ Have been trying to find out what I can about them...hasn't been much. From what I have found, they're in inactive clearing firm for the CME, and they trade CME/CBOE mostly index work. http://www.cme.com/files/GAD.pdf There is a very good CME "Access Directory", a compiled list of brokers / platforms, trade groups, and some other info. KC's info is on page 69...reads as follows... "KC-CO II, LLC is a Chicago-based trading firm that has had a strong presence in the derivatives industry since 1986. KC-CO is a private, member-owned firm trading exclusively for its own accounts. The firm primarily makes markets in index and interest rate options on the three Chicago derivatives exchanges, both on the exchange floors and over electronic interfaces. KC-CO is an inactive clearing member of CME. The firm has a strong history of promoting its trading assistants to firm traders after their extensive training both on the trading floor, in trading strategy meetings and during supplemental classroom sessions. KC-CO utilizes proprietary trading and risk management software developed and maintained by in-house information technology and quantitative research personnel." Anyways, that's what I can help out with. Will post here if I find anything more out. Anybody else have info / know anyone from the firm? All thoughts welcome.