| Abbreviation | Definition |
|---|---|
| CLBR | Caliber Learning Network |
| CLBYF | Chandeleur Bay Products Company |
| CLCI | Cadiz, Inc. |
| CLCK | Columbia Capital Corporation |
| CLCR | Clinicor, Inc. |
| CLCT | Collectors Universe |
| CLCX | Computer Learning Centers |
| CLDB | Cortland Bancorp of Ohio |
| CLDN | Celadon Group, Inc. |
| CLEBD | Celebrity Entertainment, Inc. |
| CLEC | U S Lec Corporation |
| CLFC | California Center Bank of Los Angeles |
| CLFD | Clearfield Bank & Trust Company of Pennsylvania |
| CLFY | Clarify, Inc. |
| CLGY | Cellegy Pharmaceuticals, Inc. |
| CLGYW | Cellegy Pharmaceuticals, Inc. Warrants |
| CLHB | Clean Harbors, Inc. |
| CLHD | Capital Holdings, Inc. of Ohio (delisted) |
| CLHL | Carlisle Holdings, Ltd. |
| CLHVF | Coral Gold Corporation |