| Abbreviation | Definition |
|---|---|
| UMG | University Medical Group |
| UMG | Upside-Down Media Group |
| UMG | Uranium Mining Group |
| UMG | Urban Mass-Media Group |
| UMH | United Mountain Horse |
| UMH | Universal Manufactured Homes |
| UMH | University of Missouri Health Care |
| UMHI | Universal Media Holdings Inc |
| UMI | Unidisc Music, Inc. |
| UMI | United Marine International |
| UMI | United Materials Inc |
| UMI | United Mechanical Inc |
| UMI | Universal Minerals, Inc. |
| UMI | University Microfilms, Inc. |
| UMI | Unlimited Musical Influences |
| UMI | Urban Ministries Inc |
| UMI | Ursa Major International, LTD. |
| UMKR | Uniloy, Milacron, Kemble, & Rude Communications, Inc. |
| UML | United Monkeys Limited |
| UMMC | Union Mosaic and Marble Company |