| Abbreviation | Definition |
|---|---|
| DNR | Denbury Resources, Inc. |
| DNT | Delta Air Lines, Inc. of Delaware |
| DNY | R. R. Donnelly & Sons Company |
| DO | Diamond Offshore Drilling, Inc. |
| DOL | Dole Foods, Inc. |
| DOM | Dominion Resources Bank, Warrior Trail |
| DON | Donnelly Corporation |
| DOV | Dover Corporation |
| DOX | Amdocs, LTD. |
| DP | Diagnostic Products Corporation |
| DPH | Delphi Automotive Systems Corporation |
| DPL | D P L, Inc. |
| DQE | DQE, Inc. |
| DQPA | Duquesne Capital, L. P. |
| DQUPA | Duquesne Light Company Preferred A |
| DQUPB | Duquesne Light Company Preferred B |
| DQUPC | Duquesne Light Company Preferred C |
| DQUPD | Duquesne Light Company Preferred D |
| DQUPE | Duquesne Light Company Preferred E |
| DQUPG | Duquesne Light Company Preferred G |