| Abbreviation | Definition |
|---|---|
| PZN | Prison Realty Trust |
| PZNPA | Prison Realty Trust Preferred A |
| PZX | PITTSTON Company (now Pittston Brinks, PZB) |
| Q | QWEST Communications International, Inc. |
| QJQ | Insight Communications Company, Inc. options |
| R | Ryder Systems, Incorporated |
| R | Uniroyal |
| RA | Reckson Associates Realty Corporation |
| RAD | Rite Aid Corporation |
| RAH | RALCORP Holdings, Inc. |
| RAL | Ralston Purina Company |
| RAM | Royal Appliance Manufacturing Company |
| RAY | Raytech Corporation |
| RBA | Ritchie Brothers Auctioneers, Inc. |
| RBK | Reebok International, LTD. |
| RBLX | Roblox Corp |
| RBN | Robbins & Muers, Inc. |
| RBSPB | Royal Bank Of Scotland Group, P. L. C. Preferred B |
| RBSPC | Royal Bank Of Scotland Group PLC, Preferred C |
| RBSPD | Royal Bank Of Scotland Group, P. L. C. Preferred D |