| Abbreviation | Definition |
|---|---|
| PLFE | Presidential Life Corporation |
| PLFM | Platforms International Corporation |
| PLHYQ | Planet Hollywood (in bankruptcy) |
| PLIN | Preformed Line Products Company |
| PLKR | Publicard, Inc. |
| PLLK | Parallel Technologies, Inc. |
| PLLL | Parallel Petroleum Corporation (de-listed) |
| PLLL | Parallel Petroleum Corporation of Delaware |
| PLMD | Polymedica Corporation |
| PLMK | Primelink Systems, Inc. |
| PLNR | Planar Systems, Inc. |
| PLNS | Pliant Systems, Inc. |
| PLNTC | Playnet Technologies, Inc. |
| PLRE | People Ridesharing Systems, Inc. |
| PLRP | Pacel Corporation |
| PLRS | Planet Resources, Inc. |
| PLRX | PlanetRx.Com |
| PLSEF | Phoenix Leisure Corporation |
| PLSEZ | Premier Laser Systems, Inc. |
| PLSIA | Premier Laser Systems, Inc. |