| Abbreviation | Definition |
|---|---|
| OXHP | Oxford Health Plans, Inc. |
| OXIS | Oxis International, Inc. |
| OXSQ | Oxford Square Capital Corporation |
| OYMP | Olympic Entertainment Group, Inc. |
| OYOG | O Y O Geospace Corporation |
| OZOA | Ozo Diversified Automation, Inc. |
| OZON | Cyclo P S S Corporation |
| OZRK | Bank of the Ozarks, Inc. |
| OZRKP | Bank of the Ozarks, Inc. Preferred |
| OZRKP | Bank of the Ozarks, Incorporated Preferred (de-listed) |
| OZRKP | Bank of the Ozarks, Incorporated Preferred (de-listed) |
| OZSC | Ozop Energy Solutions, Inc. |
| PAAN | Pan Am Corporation |
| PAAS | Pan American Silver Corporation |
| PABK.PK | PAB Bankshares, Inc. (formerly Pan American Bank of Los Angeles, California) |
| PABN | PanAmerican Bancorp |
| PACE | AmPace Corporation |
| PACEE | AmPace Corporation |
| PACI | Precision Auto Care, Inc. |
| PACK | Gibraltar Packaging Group |