| Abbreviation | Definition |
|---|---|
| MBE | Mwb |
| MBH | Michelmersh |
| MBO | Mobilityone |
| MBT | Mobile Tornado Group, PLC. |
| MBW | Mobilewave |
| MCAP | Mission Capital |
| MCAU | Speymill Mac. |
| MCB | Mcbride |
| MCBA | Mcb Bk 144A |
| MCBS | Mcb Bk Regs |
| MCGN | Microgen |
| MCHL | Mouchel Group |
| MCII | Marwyn Cap Ii |
| MCKS | Mckay Secs. |
| MCM | Motivcom |
| MCP | M.c.pacific |
| MCRB | Mcb Fin Grp. |
| MCRB | MCB Finance Group (de-listed) |
| MCRO | Micro Focus |
| MCT | Middlefield Prf |