| Abbreviation | Definition |
|---|---|
| PKMS | Peckham Industries, Inc. |
| PKOH | Park Ohio Holdings Corporation |
| PKPT | Packetport.Com, Inc. |
| PKSI | Primus Knowledge Solutions, Inc. |
| PKTR | Packeteer, Inc. |
| PLAB | Photonic, Inc. |
| PLAN | Open Plan Systems, Inc. |
| PLAY | Players International, Inc. |
| PLBA | Plumas Bank of Quincy, California |
| PLBA | Plumas Bank of Quincy, California (de-listed) |
| PLBA | Plumas Bank of Quincy, California (de-listed) |
| PLCC | Paulson Capital Corporation |
| PLCE | Children's Place Retail Stores, Inc. |
| PLCM | Polycom, Inc. |
| PLCO | Play Company Toys & Entertainment Corporation |
| PLCOP | Play Company Toys & Entertainment Corporation Preferred |
| PLCR | Credit Store, Inc. |
| PLDY | Paladyne Corporation |
| PLEL | Plentech Electronics, Inc. |
| PLFC | Pulaski Furniture Corporation |