| MTEN | | Metal Doors, Sash, Frames, Moldings & Trim | 1948099 |
| MTEX | | Medicinal Chemicals & Botanical Products | 1056358 |
| MTG | | Surety Insurance | 876437 |
| MTGRF | | - | 1537543 |
| MTH | | Operative Builders | 833079 |
| MTLK | | Semiconductors & Related Devices | 1098462 |
| MTLS | | Services-Prepackaged Software | 1091223 |
| MTMTY | | - | 2090231 |
| MTN | | Services-Miscellaneous Amusement & Recreation | 812011 |
| MTNB | | Pharmaceutical Preparations | 1582554 |
| MTR | | Oil Royalty Traders | 313364 |
| MTRN | | Metal Forgings & Stampings | 1104657 |
| MTRX | | Construction - Special Trade Contractors | 866273 |
| MTSI | | Semiconductors & Related Devices | 1493594 |
| MTUS | | Steel Works, Blast Furnaces & Rolling Mills (Coke Ovens) | 1598428 |
| MTVA | | Pharmaceutical Preparations | 1638287 |
| MTW | | Construction Machinery & Equip | 61986 |
| MTWO | | Wholesale-Metals & Minerals (No Petroleum) | 1753373 |
| MTX | | Industrial Inorganic Chemicals | 891014 |
| MTZ | | Water, Sewer, Pipeline, Comm & Power Line Construction | 15615 |
| MU | | Semiconductors & Related Devices | 723125 |
| MUA | | 0000 | 901243 |
| MUC | | - | 1051004 |
| MUE | | - | 1071899 |
| MUFG | | Commercial Banks, NEC | 67088 |
| MUJ | | - | 1053988 |
| MUR | | Crude Petroleum & Natural Gas | 717423 |
| MURA | | Pharmaceutical Preparations | 1971543 |
| MUSA | | Retail-Auto Dealers & Gasoline Stations | 1573516 |
| MUX | | Gold and Silver Ores | 314203 |
| MVBF | | State Commercial Banks | 1277902 |
| MVCO | | Finance Services | 924095 |
| MVF | | 0000 | 835948 |
| MVIS | | Electronic Components, NEC | 65770 |
| MVNC | | Finance Services | 1439264 |
| MVO | | Crude Petroleum & Natural Gas | 1371782 |
| MVST | | Miscellaneous Electrical Machinery, Equipment & Supplies | 1760689 |
| MVT | | 0000 | 897269 |
| MWA | | Miscellaneous Fabricated Metal Products | 1350593 |
| MWAI | | Finance Services | 1520118 |
| MWG | | Miscellaneous Manufacturing Industries | 1941500 |
| MWYN | | Wholesale-Groceries, General Line | 2030522 |
| MX | | Semiconductors & Related Devices | 1325702 |
| MXC | | Crude Petroleum & Natural Gas | 66418 |
| MXCT | | Services-Commercial Physical & Biological Research | 1287098 |
| MXE | | - | 863900 |
| MXF | | - | 65433 |
| MXL | | Semiconductors & Related Devices | 1288469 |
| MYCB | | Real Estate | 1556801 |
| MYD | | 0000 | 879361 |
