| Abbreviation | Definition |
|---|---|
| MOCO | MOCON, Inc. |
| MODI | Modine Manufacturing Company, Inc. |
| MODM | Modern Medical Modalities |
| MODT | Modtech Holdings, Inc. |
| MODU | Mod U Kraf Homes, Inc. |
| MOE | Mark Of Excellence |
| MOGN | M G I Pharmaceuticals, Inc. |
| MOIL | Maynard Oil Company |
| MOKA | Coffee People, Inc. |
| MOKTL | Missouri, Kansas, and Texas Railroad Company |
| MOLX | Molex, Inc. |
| MOLXA | Molex, Inc. Class A |
| MOLY | Worldwide Petromoly, Inc. |
| MOND | Robert Mondavi Corporation |
| MONE | Matrixone, Inc. |
| MONFA | Monaco Finance, Inc. Class A |
| MONM | Monmouth Capital Corporation |
| MONOO | Monongahela Power Company |
| MONOP | Monongahela Power Company Preferred |
| MONT | Montgomery Financial Corporation |