| Name | Ticker | Type | ISIN code |
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| UAL CORPORATION | UAUA | Stock | US9025498075 |
| UCBH HOLDINGS, INC. | UCBH | Stock | US90262T3086 |
| UCN, INC. | UCNN | Stock | |
| UFP TECHNOLOGIES. | UFPT | Stock | US9026731029 |
| ULTA SALON, COSMETICS & FRAGRANCE. | ULTA | Stock | |
| ULTIMATE SOFTWARE GROUP. (THE) | ULTI | Stock | US90385D1072 |
| ULTRA CLEAN HOLDINGS. | UCTT | Stock | US90385V1070 |
| ULTRALIFE CORPORATION | ULBI | Stock | US9038991025 |
| ULTRAPETROL (BAHAMAS) LIMITED | ULTR | Stock | BSP943981071 |
| ULTRATECH, INC. | UTEK | Stock | US9040341052 |
| UMB FINANCIAL CORPORATION | UMBF | Stock | US9027881088 |
| UMPQUA HOLDINGS CORPORATION | UMPQ | Stock | US9042141039 |
| UNICA CORPORATION | UNCA | Stock | US9045831016 |
| UNICO AMERICAN CORPORATION | UNAM | Stock | US9046071083 |
| UNION BANKSHARES CORPORATION | UBSH | Stock | US9053991017 |
| UNION DRILLING, INC. | UDRL | Stock | US90653P1057 |
| UNITED AMERICA INDEMNITY, LTD. | INDM | Stock | US90933T1097 |
| UNITED AMERICAN HEALTHCARE CORPORATION | UAHC | Stock | US90934C1053 |
| UNITED BANCORP, INC. | UBCP | Stock | US9099111091 |
| UNITED BANCSHARES. | UBOH | Stock | US9094581017 |
| UNITED BANKSHARES. | UBSI | Stock | US9099071071 |
| UNITED COMMUNITY BANCORP | UCBA | Stock | US90984H1032 |
| UNITED COMMUNITY BANKS. | UCBI | Stock | US90984P1057 |
| UNITED COMMUNITY FINANCIAL CORP. | UCFC | Stock | US9098391025 |
| UNITED FINANCIAL BANCORP. | UBNK | Stock | US91030R1032 |