| Code | Name | High | Low | Close | Volume | Change |
| UACL | Universal Truckload Services Inc. | 16.45 | 15.07 | 15.55 | 69,535 | 0.60 |  | 3.72 |
| UAHC | United American Healthcare Corporation | 0.9900 | 0.9600 | 0.9900 | 1,934 | 0.0300 |  | 3.13 |
| UAUA | UAL Corporation | 7.090 | 6.520 | 6.960 | 10,359,736 | 0.440 |  | 6.75 |
| UBCP | United Bancorp Inc. | 7.640 | 7.250 | 7.640 | 3,044 | 0.520 |  | 7.30 |
| UBET | Youbet.com Inc. | 2.360 | 2.250 | 2.310 | 70,597 | 0.010 |  | 0.43 |
| UBFO | United Security Bancshares | 5.000 | 4.370 | 4.510 | 39,583 | 0.140 |  | 3.01 |
| UBNK | United Financial Bancorp Inc. | 12.91 | 12.72 | 12.87 | 25,464 | 0.08 |  | 0.62 |
| UBOH | United Bancshares Inc. | 10.290 | 9.800 | 9.800 | 6,865 | 0.240 |  | 2.39 |
| UBSH | Union Bankshares Corporation | 11.77 | 11.25 | 11.42 | 68,103 | 0.33 |  | 2.81 |
| UBSI | United Bankshares Inc. | 17.15 | 16.76 | 17.04 | 205,272 | 0.09 |  | 0.53 |
| UCBA | United Community Bancorp | 6.710 | 6.710 | 6.710 | 1,200 | 0.390 |  | 6.17 |
| UCBH | UCBH Holdings Inc. | 0.8600 | 0.8200 | 0.8400 | 1,256,539 | 0.0200 |  | 2.33 |
| UCBI | United Community Banks Inc. | 3.900 | 3.740 | 3.850 | 1,436,818 | 0.050 |  | 1.32 |
| UCFC | United Community Financial Corp. | 1.570 | 1.430 | 1.500 | 17,888 | 0.030 |  | 1.96 |
| UCTT | Ultra Clean Holdings Inc. | 5.860 | 5.620 | 5.850 | 57,997 | 0.200 |  | 3.53 |
| UDRL | Union Drilling Inc. | 7.310 | 6.800 | 6.810 | 31,467 | 0.500 |  | 6.84 |
| UEIC | Universal Electronics Inc. | 23.00 | 20.15 | 22.83 | 110,915 | 1.66 |  | 7.84 |
| UEPS | Net 1 UEPS Technologies Inc. | 19.35 | 18.26 | 19.35 | 446,423 | 1.05 |  | 5.74 |
| UFCS | United Fire & Casualty Company | 17.47 | 17.07 | 17.28 | 56,694 | 0.12 |  | 0.69 |
| UFPI | Universal Forest Products Inc. | 39.18 | 37.07 | 38.02 | 134,621 | 0.33 |  | 0.86 |
| UFPT | UFP Technologies Inc. | 6.850 | 6.720 | 6.760 | 43,831 | 0.030 |  | 0.44 |
| UG | UNITED GUARDIAN INC | 9.950 | 9.730 | 9.950 | 1,568 | 0.040 |  | 0.40 |
| UHAL | Amerco | 46.29 | 43.11 | 46.07 | 31,301 | 2.57 |  | 5.91 |
| ULBI | Ultralife Corporation | 4.110 | 4.000 | 4.070 | 175,579 | 0.060 |  | 1.45 |
| ULGX | Urologix Inc. | 1.040 | 1.040 | 1.040 | 100 | 0.020 |  | 1.89 |
| ULTA | Ulta Salon Cosmetics & Fragrance Inc. | 17.15 | 16.41 | 17.02 | 154,587 | 0.01 |  | 0.06 |
| ULTI | Ultimate Software Group Inc. (The) | 27.63 | 26.84 | 27.63 | 190,641 | 0.50 |  | 1.84 |
| ULTR | Ultrapetrol (Bahamas) | 5.090 | 4.900 | 5.010 | 47,990 | 0.080 |  | 1.57 |
| UMBF | UMB Financial Corporation | 39.47 | 38.56 | 39.18 | 98,834 | 0.34 |  | 0.86 |
| UMPQ | Umpqua Holdings Corporation | 9.960 | 9.670 | 9.850 | 612,602 | 0.100 |  | 1.01 |
| UNAM | Unico American Corporation | 9.780 | 9.690 | 9.700 | 3,400 | 0.040 |  | 0.41 |
| UNB | UNION BANKSHARES INC | 16.87 | 16.62 | 16.62 | 400 | 0.36 |  | 2.21 |
| UNCA | Unica Corporation | 6.930 | 6.430 | 6.910 | 27,873 | 0.030 |  | 0.44 |
| UNFI | United Natural Foods Inc. | 25.16 | 24.54 | 24.83 | 189,905 | 0.21 |  | 0.84 |
| UNFY | UNIFY CORP | 2.700 | 2.650 | 2.650 | 1,869 | 0.030 |  | 1.12 |
| UNTD | United Online Inc. | 8.790 | 8.340 | 8.520 | 584,020 | 0.120 |  | 1.39 |
| UNTY | Unity Bancorp Inc. | 4.200 | 4.050 | 4.200 | 388 | 0.000 |  | 0.00 |
| URBN | Urban Outfitters Inc. | 32.78 | 31.77 | 32.43 | 2,871,688 | 0.42 |  | 1.31 |
| URRE | Uranium Resources Inc. | 1.050 | 1.000 | 1.030 | 245,668 | 0.010 |  | 0.96 |
| USAK | USA Truck Inc. | 11.49 | 11.09 | 11.30 | 18,557 | 0.04 |  | 0.35 |
| USAP | Universal Stainless & Alloy Products | 15.07 | 14.83 | 14.91 | 8,979 | 0.21 |  | 1.39 |
| USAT | USA Technologies Inc. | 1.650 | 1.590 | 1.650 | 20,900 | 0.060 |  | 3.77 |
| USATP | USA Technologies Inc. | 9.250 | 9.030 | 9.030 | 2,000 | 0.030 |  | 0.33 |
| USATW | USA TECHNOLOGIES INC. | 0.4300 | 0.4300 | 0.4300 | 8,500 | 0.0800 |  | 22.86 |
| USBI | United Security Bancshares Inc. | 19.50 | 18.78 | 18.78 | 10,419 | 0.70 |  | 3.59 |
| USEG | U.S. Energy Corp. | 6.600 | 6.110 | 6.450 | 727,034 | 0.220 |  | 3.53 |
| USHS | U.S. Home Systems Inc. | 2.470 | 2.435 | 2.450 | 1,200 | 0.030 |  | 1.21 |
| USLM | United States Lime & Minerals Inc. | 35.02 | 34.20 | 34.45 | 4,579 | 0.36 |  | 1.03 |
| USMO | USA Mobility Inc. | 10.93 | 10.72 | 10.80 | 175,344 | 0.10 |  | 0.92 |
| USNA | USANA Health Sciences Inc. | 29.91 | 29.12 | 29.66 | 34,332 | 0.13 |  | 0.44 |
| USPH | U.S. Physical Therapy Inc. | 16.16 | 15.33 | 16.10 | 21,865 | 0.37 |  | 2.35 |
| USTR | United Stationers Inc. | 49.75 | 48.54 | 49.53 | 98,790 | 0.09 |  | 0.18 |
| UTEK | Ultratech Inc. | 13.02 | 12.79 | 13.01 | 270,529 | 0.11 |  | 0.85 |
| UTHR | United Therapeutics Corporation | 43.57 | 42.27 | 43.00 | 514,959 | 0.15 |  | 0.35 |
| UTIW | UTi Worldwide Inc. | 13.99 | 13.59 | 13.63 | 512,358 | 0.20 |  | 1.45 |
| UTMD | Utah Medical Products Inc. | 29.53 | 28.89 | 29.53 | 5,682 | 0.04 |  | 0.14 |
| UTSI | UTStarcom Inc. | 1.820 | 1.710 | 1.790 | 407,328 | 0.050 |  | 2.72 |
| UVSP | Univest Corporation of Pennsylvania | 18.08 | 17.27 | 17.45 | 48,049 | 0.45 |  | 2.51 |
| UWBK | United Western Bancorp Inc. | 3.580 | 3.380 | 3.440 | 117,903 | 0.010 |  | 0.29 |