| UFO Gestapo | 1 | 55 | 0 | |
| Ufomammut | 1 | 18 | 0 | |
| Ulcerate | 1 | 10 | 0 | |
| Ultha | 8 | 282 | 0 | |
| UltraMantis Black | 1 | 0 | 0 | |
| Ultrasound | 1 | 0 | 0 | |
| Ultraviolence | 1 | 3 | 0 | |
| Ulver | 3 | 107 | 0 | |
| Umbra Nihil | 4 | 8 | 0 | |
| Un | 2 | 67 | 0 | |
| Unarm | 1 | 0 | 0 | |
| Unbeing | 1 | 13 | 0 | |
| The Unborn | 1 | 0 | 0 | |
| Uncle Acid And The Deadbeats | 2 | 19 | 0 | |
| Undacova | 1 | 0 | 0 | |
| Undermind | 1 | 1 | 0 | |
| Undersmile | 3 | 5 | 0 | |
| Undivine Essence | 1 | 4 | 0 | |
| Unearthly Trance | 14 | 162 | 0 | |
| Ungl'unl'rrlh'chchch | 1 | 67 | 0 | |
| Unholy Grave | 1 | 0 | 0 | |
| The Unholy Three | 1 | 9 | 0 | |
| Unicorn Love | 1 | 1 | 0 | |
| Universe217 | 1 | 1 | 0 | |
| Unkind | 1 | 0 | 0 | |
| Unorthodox | 3 | 370 | 0 | |
| Unsane | 1 | 0 | 0 | |
| Until My Funerals Began | 1 | 0 | 0 | |
| Uphill Battle | 1 | 0 | 0 | |
| Upwards Of Endtime | 1 | 2 | 0 | |
| Ural Umbo | 1 | 2 | 0 | |
| Urban Trash | 1 | 0 | 0 | |
| Urfaust | 7 | 218 | 0 | |
| Uroboros | 1 | 3 | 0 | |
| Urr | 1 | 3 | 0 | |
| Urzeit | 4 | 90 | 0 | |
| Usko | 1 | 0 | 0 | |
| Usnea | 2 | 60 | 0 | |
| Utarm | 1 | 3 | 0 | |
| Utsuro Bune | 1 | 29 | 0 | |
| Uur | 2 | 9 | 0 | |
| Uzala | 1 | 43 | 0 |