| Abbreviation | Definition |
|---|---|
| MRBK | Mercantile Bankshares, Inc. |
| MRCH | Marchfirst, Inc. |
| MRCO | Meridian National Corporation |
| MRCOP | Meridian National Corporation Preferred |
| MRCY | Mercury Computer Systems |
| MRDG | Miracor Diagnostics |
| MRGE | Merge Technologies, Inc. |
| MRGO | Margo Caribe, Inc. |
| MRII | Medical Resources, Inc. |
| MRKF | Market Financial Corporation |
| MRKR | Marker International |
| MRMC | Medical Resources, Inc. |
| MRMY | Memry Corporation |
| MRNT | Merant, P. L. C. Sponsored Depositary Recripts |
| MRQT | Marquett Savings Bank, S. A. |
| MRSA | Marisa Christina, Inc. |
| MRTI | Metal Recovery Technologies, Inc. |
| MRTK | Maritek Corporation |
| MRTN | Marten Transport, LTD. |
| MRTO | MerchantOnLine.Com |