| Abbreviation | Definition |
|---|---|
| PING | Pinnacle Global Group, Incorporated (de-listed) |
| PIOG | Pioneer Group, Inc. |
| PIOG | Pioneer Group, Incorporated (de-listed) |
| PIOG | Pioneer Group, Incorporated (de-listed) |
| PIOL | Pioneer Oil & Gas |
| PIONA | Pioneer Companies, Inc. Class A |
| PIONA | Pioneer Companies, Incorporated Class A (de-listed) |
| PIONA | Pioneer Companies, Incorporated Class A (de-listed) |
| PIOS | Pioneer Standard Electric, Inc. |
| PISC | Pacific International Services Corporation |
| PIXR | Pixar |
| PIXT | Pixtech, Inc. |
| PJAM | P J America, Inc. |
| PJET | Priority Aviation, Inc. |
| PKAM | Parks American, Inc. |
| PKER | Poker.Com, Inc. |
| PKIN | Pekin Life Insurance Company |
| PKLB | Pharmakinetics Labs, Inc. |
| PKLBD | Pharmakinetics Labs, Inc. |
| PKMB | Park Meridian Bank |