| Abbreviation | Definition |
|---|---|
| MCL | Moore, LTD. |
| MCM | Controladora Comercial de Mexico |
| MCN | M C N Energy Group, Inc. |
| MCNPA | M C N Financing I |
| MCNPI | M C N Energy Group, Inc. Preferred I |
| MCNPS | M C N Financing II |
| MCNPT | M C N Michigan Limited Partnership Preferred T |
| MCO | Merrill Lynch & Company, Inc. |
| MCO | Moody's Corporation |
| MCR | M F S Charter Income Trust Fund |
| MCS | Marcus Corporation |
| MCT | Monsanto Company |
| MCW | McDonalds Corporation |
| MCY | Mercury General Corporation |
| MDA | Media Arts Group, Inc. |
| MDC | M D C Holdings, Inc. |
| MDG | Meridian Gold, Inc. |
| MDM | Medium4.com, Inc. |
| MDP | Meredith Corporation |
| MDR | McDermott International, Inc. |