| Umberto Tozzi |
207 |
| Umbra Et Imago |
36 |
| Umbra et Imago |
5 |
| Umbrellas |
4 |
| Umira2 |
4 |
| Umphrey's McGee |
103 |
| UnSun |
29 |
| Unanimated |
28 |
| Unarmed For Victory |
4 |
| Unashamed |
23 |
| Unbekannt |
100 |
| Unbelievable Truth |
10 |
| Unbroken |
28 |
| Unbunny |
17 |
| UnchainD |
7 |
| Uncle |
12 |
| Uncle Brian |
9 |
| Uncle Deadly |
5 |
| Uncle Earl |
34 |
| Uncle Frank |
4 |
| Uncle Ho |
14 |
| Uncle Jim |
6 |
| Uncle Kracker |
87 |
| Uncle Sam |
10 |
| Uncle Tupelo |
84 |
| Uncle Walt's Band |
3 |
| Uncommonmenfrommars |
6 |
| Unconditional |
4 |
| Uncut |
7 |
| Undead |
18 |
| Undeclinable |
5 |
| Undeclinable Ambuscade |
6 |
| Under A Nightmare |
3 |
| Under Black Clouds |
8 |
| Under Byen |
4 |
| Under Foreign Skies |
6 |
| Under Radar |
11 |
| Under The Flood |
23 |
| Under The Scythe |
3 |
| Under The Shadow |
5 |
| Under The Weather |
7 |
| Undercast |
4 |
| Undercroft |
62 |
| Underdog Project |
4 |
| Underground Dimension |
4 |
| Underminded |
8 |
| Undermine |
5 |
| Underneath The Gun |
22 |
| Underoath |
108 |
| Underscore |
12 |
| Undertakers |
14 |
| Undertow |
8 |
| Underwater Pilots |
3 |
| Underworld |
109 |
| Undun |
9 |
| Undying |
17 |
| Unearth |
72 |
| Unearthly Trance |
11 |
| Unemployed |
4 |
| Uness |
6 |
| Unexpect |
23 |
| Unextraordinary Gentlemen |
4 |
| Unfinished Thought |
26 |
| Unfold |
7 |
| Unfortunate |
6 |
| Ungu |
40 |
| Unheilig |
125 |
| Unhindered |
4 |
| Unhinged |
15 |
| Unhola |
5 |
| Unholy |
36 |
| Unholy Grave |
8 |
| Unholy Matrimony |
12 |
| Unicorn |
5 |
| Unida |
16 |
| Unified Theory |
14 |
| Uniform Motion |
3 |
| Uniikki |
8 |
| Uniklubi |
77 |
| Union |
23 |
| Union 13 |
47 |
| Union Carbide Productions |
10 |
| Union J |
11 |
| Union Of Knives |
3 |
| Union Pulse |
15 |
| Unique |
8 |
| Unisonic |
15 |
| Unit |
10 |
| Unit Lost |
3 |
| Unite The Faith |
6 |
| United |
4 |
| United Female Sounds Of R&b |
5 |
| United Kingdom |
15 |
| United Nations |
7 |
| United State Of Electronica |
7 |
| United State Of Mind |
7 |
| Uniting Nations |
9 |
| Unitopia |
12 |
| Unity |
4 |
| Unity Of Inferior |
3 |