| Abbreviation | Definition |
|---|---|
| MFCO | Microwave Filter Company, Inc. |
| MFCV | Marathon Financial Corporation |
| MFDE | DECS Trust VI |
| MFFC | Milton Federal Financial Corporation |
| MFLR | Mayflower Co-op Bank |
| MFNF | M F N Financial Corporation |
| MFNX | Metromedia Fiber Network |
| MFRI | M F R I, Inc. |
| MFSF | M F S Financial, Inc. |
| MFUN | Morgan Fundshares, Inc. |
| MGAB | Malaga Bank of California |
| MGAM | Multimedia Games, Inc. |
| MGAMW | Multimedia Games, Inc. Warrants |
| MGAMZ | Multimedia Games, Inc. |
| MGAWV | Marcum Natural Gas Service |
| MGEN | Micro General Corporation |
| MGIC | Magic Software Entertainment, LTD. |
| MGIFF | M G I Software Corporation |
| MGLCF | Misty Mountain Gold, LTD. |
| MGLG.PK | Magellan Energy, LTD. |