| Abbreviation | Definition |
|---|---|
| COC | Conoco, Inc. (now ConocoPhillips, COP) |
| COCA | Conoco, Inc. Class A (now ConocoPhillips) (de-listed) |
| COCB | Conoco, Inc. Class B (now ConocoPhillips) |
| COE | Cone M L S Corporation of North Carolina |
| COF | Capital One Financial Corporation |
| COG | Cabot Oil & Gas Corporation |
| COL | Columbia/ HCA Healthcare Company |
| COO | Cooper Companies, Inc. |
| COP | CONOCO Phillips, Inc. |
| COP | CONOCO Phillips, Incorporated |
| COP | Consolidated Products, Inc. (delisted) |
| COX | Cox Communications, Inc. |
| COXPG | Cox Communications, Inc. Preferred G |
| COXPI | Cox Communications, Inc. Preferred I |
| COY | Corporate High Yield Fund, Inc. |
| CP | Canadian Pacific, LTD. |
| CPB | Campbell Soup Company |
| CPC | Central Packaging Corporation |
| CPD | Carolina Power and Light Company |
| CPE | Callon Petroleum Company of Delaware |