| Abbreviation | Definition |
|---|---|
| CTHR | C3, Inc. |
| CTIB | C T I Industries Corporation |
| CTIC | Cell Therapeutics, Inc. |
| CTIG | C T I Group Holdings, Inc. |
| CTII | Cytotherapeutics, Inc. |
| CTIM | Childtime Learning Centers |
| CTIX | Cheap Tickets, Inc. |
| CTKKF | Caldera Technologies Corporation |
| CTKT | Cetek Technologies, Inc. |
| CTLG | Specialty Catalog Corporation |
| CTOO | C2, Inc. |
| CTPPL | Central Maine Power and Light Company |
| CTPTF | Castle Capital, Inc. |
| CTRA | Centra Software, Inc. |
| CTRA.LK | Ciputra Development TBK |
| CTRB | Connecticut River Bank |
| CTRB.KL | Century Bond BHD |
| CTRL | Centaur Mining and Exploration Class A |
| CTRN | Citi Trends, Inc. |
| CTRP | Ctrip.com International, LTD. |