| 51 | CHICAGO ANALYTIC TRADING COMPANY |
| 52 | CHICAGO ASSET MANAGEMENT COMPANY |
| 53 | CHICAGO BOARD BROKERAGE L.L.C. |
| 54 | CHICAGO BOARD OF TRADE |
| 55 | CHICAGO BOARD OPTIONS EXCHANGE |
| 56 | CHICAGO CAPITAL MARKETS LLC |
| 57 | CHICAGO CORPORATION THE |
| 58 | CHICAGO EQUITY PARTNERS |
| 59 | CHICAGO MERCANTILE EXCHANGE |
| 60 | CHICAGO RICE AND COTTON EXCHANGE |
| 61 | CHICAGO STOCK EXCHANGE INC. |
| 62 | CINCINNATI STOCK EXCHANGE |
| 63 | CITADEL |
| 64 | CITADEL ADVISORS LLC |
| 65 | CITADEL INVESTMENT GROUP L.L.C. |
| 66 | CITADEL INVESTMENT GROUP, L.L.C. |
| 67 | CITIBANK INTERNATIONAL |
| 68 | CITY OF CHICAGO |
| 69 | CLEARING CORPORATION FOR OPTIONS AND SECURITIES |
| 70 | COCHRAN CARONIA SECURITIES LLC |
| 71 | COLUMBIA WANGER ASSET MANAGEMENT LP |
| 72 | COMERICA BANK ILLINOIS |
| 73 | CONCORD ASSET MANAGEMENT |
| 74 | CONCORDE AM |
| 75 | CONSOLIDATED TRADING LLC |