| | ✓ unvrs | 70° | | 1,871 | 746 | 11,656 | 18 | #2726773 | | Amsterdam | |
| ✓ ubik | 97° | | 2,589 | 1,055 | 10,102 | 42,106 | #3448059 | | Atlanta | |
| ✓ UVMer | 239° | 65%+ | 3,310 | 1,543 | 9,939 | 177,783 | #3639679 | | Chicago | |
| ✓ Uranus | 360° | | 2,102 | 1,125 | 8,113 | 114,636 | #3751270 | | Atlanta | |
| ✓ UnoriginalSN | 100° | | 1,419 | 500 | 5,521 | 0 | #2087964 | | Origin | |
| ✓ unity | 116° | 75%+ | 1,348 | 731 | 5,041 | 27,123 | #3815513 | | New York | |
| ✓ UhOh | 91° | | 1,305 | 542 | 4,894 | 178 | #1775315 | | Diameter | |
| ✓ UNIT-01 | 113° | 55%+ | 253 | 160 | 4,643 | 1,553 | #3463764 | | Dallas | |
| ✓ un | | | 1,374 | 644 | 4,478 | 0 | #2440799 | | London | |
| ✓ ulysses | 100° | | 1,151 | 601 | 4,314 | 17,830 | #2608593 | | Amsterdam | |
| ✓ unipro | 100° | | 1,032 | 435 | 4,017 | 0 | #3044838 | | Toronto | |
| ✓ U Good | 182° | 75%+ | 1,253 | 927 | 3,958 | 69,333 | #3806731 | | Chicago-5 | |
| ✓ unplanned | 34° | 55%+ | 814 | 326 | 3,502 | 4,160 | #1959255 | | Orbit | |
| ✓ Uncle Creamy | 48° | | 640 | 349 | 3,222 | 758 | #3807548 | | Atlanta | |
| ✓ umineko | 104° | 65%+ | 1,070 | 425 | 3,037 | 57,921 | #1096261 | | Chord | |
| ✓ upsidedown | 202° | 55%+ | 754 | 412 | 2,976 | 49,590 | #2994708 | | Atlanta | |
| ✓ Usain Ballt | 159° | 55%+ | 756 | 383 | 2,773 | 45,321 | #3768923 | | Atlanta | |
| ✓ Unicycle | 207° | | 860 | 393 | 2,742 | 48,640 | #3574479 | | Chicago | |
| ✓ UnderTheBall | 98° | | 410 | 151 | 2,430 | 23,716 | #1198390 | | Radius | |
| ✓ undeath | 79° | | 538 | 214 | 2,241 | 33,425 | #766837 | | Chord | |
| ✓ usually last | 113° | | 624 | 355 | 1,891 | 32,226 | #2539922 | | Dallas | |
| ✓ Uma Thurman | 100° | | 380 | 159 | 1,644 | 24,623 | #3686680 | | New York | |
| ✓ Unreliable | 80° | | 433 | 212 | 1,580 | 18,652 | #3188324 | | San Francisco | |
| ✓ Urban Meyer | 121° | | 394 | 203 | 1,516 | 23,723 | #2542831 | | Dallas | |
| ✓ Ultimatum | 100° | 75%+ | 366 | 116 | 1,507 | 7,616 | #2652175 | | Sydney | |
| ✓ UmamiThurman | 95° | 55%+ | 304 | 173 | 1,491 | 22,114 | #3655800 | | Chicago-3 | |
| ✓ Unball | 72° | | 360 | 183 | 1,463 | 23,286 | #2803327 | | Frankfurt | |
| ✓ uuu | 155° | | 305 | 140 | 1,446 | 12,635 | #1177401 | | Radius | |
| ✓ Ultron | 69° | 55%+ | 227 | 86 | 1,313 | 1,406 | #3286387 | | Dallas | |
| ✓ UZUMAKI | 102° | | 370 | 129 | 1,311 | 20,479 | #1231338 | | Diameter | |
| ✓ Unit Vector | 97° | 55%+ | 358 | 173 | 1,304 | 23,009 | #3469687 | | New York | |
| ✓ Umor | | 75%+ | 61 | 28 | 1,291 | 0 | #2002234 | | Orbit | |
| ✓ UNCLE IROH | 214° | | 349 | 194 | 1,240 | 19,869 | #3022081 | | Toronto | |
| ✓ uh | 245° | 65%+ | 451 | 234 | 1,227 | 24,325 | #3262198 | | Dallas | |
| ✓ unit | 104° | 75%+ | 353 | 180 | 1,205 | 48 | #3476847 | | New York | |
| ✓ urkel | 128° | | 268 | 138 | 1,196 | 17,413 | #3815468 | | Chicago-2 | |
| ✓ USCphildo | 55° | | | 1,195 | | #b5845183 | | Origin | |
| ✓ Uzumaki_ | 82° | | 211 | 95 | 1,180 | 12,624 | #748409 | | Diameter | |
| ✓ updoke | 119° | 75%+ | 354 | 172 | 1,157 | 733 | #2798336 | | New York | |
| ✓ u say tomato | 106° | | 324 | 168 | 1,124 | 1,308 | #3608708 | | Seattle | |
| ✓ UNIVERSE | 96° | 55%+ | 294 | 95 | 1,115 | 14,042 | #3245420 | | San Francisco | |
| ✓ UpYrButtJobu | 90° | | 290 | 153 | 1,091 | 19,341 | #2411212 | | Dallas | |
| ✓ umad | 137° | | 205 | 87 | 1,035 | 13,167 | #2390078 | | Chicago | |
| ✓ Unai Emery | 53° | | 193 | 120 | 999 | 14,886 | #3747927 | | New York | |
| ✓ Unicode | 66° | | 236 | 125 | 988 | 7,758 | #3158454 | | Amsterdam | |
| ✓ unko | 91° | | 106 | 57 | 894 | 7,670 | #2423446 | | Dallas | |
| ✓ Unicorns! | 92° | | 0 | 0 | 867 | 11 | #198421 | | Radius | |
| ✓ Uther | 51° | 65%+ | 228 | 70 | 853 | 7,015 | #1637681 | | Orbit | |
| ✓ undyingderp | 48° | | 141 | 82 | 852 | 11,013 | #3709340 | | Chicago-3 | |
| ✓ Ughh | 91° | | 203 | 96 | 839 | 13,361 | #3504117 | | Chicago | |