| Abbreviation | Definition |
|---|---|
| CTR | Crutches Resources Corporation (delisted) |
| CTT | Competitive Technologies, Inc. |
| CTU | Chad Therapeutics, Inc. |
| CTY | Community Banks, Inc. |
| CUB | Cubic Corporation |
| CUO | Continental Materials Corporation |
| CVB | C V B Financial Corporation |
| CVC | Cablevision Systems Corporation |
| CVM | Cel-Sci Corporation |
| CVR | Chicago Rivet & Machine Company |
| CXI | Commodore Applied Technology, Inc. |
| CXY | Canadian Occidental Petroleum, LTD. |
| CYB | Cybex International, Inc. |
| CYL | Community Capital Corporation of South Carolina |
| CYP | Cypros Pharmaceutical Corporation |
| DAR | Darling International, Inc. |
| DAY | Dayton Mining Corporation |
| DC | Datametrics Corporation |
| DCU | DryClean U S A, Inc. |
| DDD | Chequemate International, Inc. |