| UA split history Under Armour Inc | NYSE | Cyclical Consumer Goods & Services |
| UACL split history Universal Truckload Services, Inc. | NASDAQ | Industrials |
| UAHC split history United American Healthcare. | NASDAQ | Non-Cyclical Consumer Goods & Services |
| UAL split history United Continental Holdings Inc | NYSE | Industrials |
| UAM split history Universal American Corporation | NYSE | Financials |
| UAMY split history United States Antimony Corporation | NYSEMKT | Basic Materials |
| UAN split history CVR Partners LP | NYSE | Basic Materials |
| UAUA split history UAL Corporation | NASDAQ | Industrials |
| UBA split history Urstadt Biddle Properties Inc | NYSE | Financials |
| UBCP split history United Bancorp, Inc. | NASDAQ | Financials |
| UBFO split history United Security Bancshares | NASDAQ | Financials |
| UBIC split history Ubic Inc (ADR) | NASDAQ | Technology |
| UBNK split history United Financial Bancorp Inc | NASDAQ | Financials |
| UBNT split history Ubiquiti Networks Inc | NASDAQ | Technology |
| UBOH split history United Bancshares Inc. OH | NASDAQ | Financials |
| UBP split history Urstadt Biddle Properties Inc | NYSE | Financials |
| UBS split history UBS AG | NYSE | Financials |
| UBSH split history Union Bankshares Corp | NASDAQ | Financials |
| UBSI split history United Bankshares, Inc. | NASDAQ | Financials |
| UCBA split history United Community Bancorp Inc | NASDAQ | Financials |
| UCBI split history United Community Banks, Inc. | NASDAQ | Financials |
| UCFC split history United Community Financial Corp | NASDAQ | Financials |
| UCI split history HealthMarkets, Inc. | NYSE | Financials |
| UCP split history UCP Inc | NYSE | Industrials |
| UCTT split history Ultra Clean Holdings Inc | NASDAQ | Technology |
| UDF split history United Development Funding IV | NASDAQ | Financials |
| UDR split history UDR, Inc. | NYSE | Financials |
| UDRL split history Union Drilling, Inc. | NASDAQ | Energy |
| UEC split history Uranium Energy Corp. | NYSEMKT | Energy |
| UEIC split history Universal Electronics Inc | NASDAQ | Technology |
| UEPS split history Net 1 UEPS Technologies Inc | NASDAQ | Industrials |
| UFCS split history United Fire Group, Inc. | NASDAQ | Financials |
| UFI split history Unifi, Inc. | NYSE | Cyclical Consumer Goods & Services |
| UFPI split history Universal Forest Products, Inc. | NASDAQ | Basic Materials |
| UFPT split history UFP Technologies, Inc. | NASDAQ | Basic Materials |
| UFS split history Domtar Corp (USA) | NYSE | Basic Materials |
| UG split history United-Guardian, Inc. | NASDAQ | Healthcare |
| UGI split history UGI Corp | NYSE | Utilities |
| UGP split history Ultrapar Participacoes SA (ADR) | NYSE | Energy |
| UHAL split history AMERCO | NASDAQ | Industrials |
| UHS split history Universal Health Services, Inc. | NYSE | Healthcare |
| UHT split history Universal Health Realty Income Trust | NYSE | Financials |
| UIHC split history United Insurance Holdings Corp.(NDA) | NASDAQ | Financials |
| UIL split history UIL Holdings Corporation | NYSE | Utilities |
| UIS split history Unisys Corporation | NYSE | Technology |
| UL split history Unilever plc (ADR) | NYSE | Non-Cyclical Consumer Goods & Services |
| ULBI split history Ultralife Corp. | NASDAQ | Industrials |
| ULCM split history Ulticom, Inc. | NASDAQ | Technology |
| ULGX split history Urologix Inc | NASDAQ | Healthcare |
| ULTA split history Ulta Salon, Cosmetics & Fragrance, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| ULTI split history The Ultimate Software Group, Inc. | NASDAQ | Technology |
| ULTR split history Ultrapetrol (Bahamas) Limited | NASDAQ | Industrials |
| ULU split history Uluru Inc. | AMEX | Healthcare |
| UMBF split history UMB Financial Corporation | NASDAQ | Financials |
| UMC split history United Microelectronics Corp (ADR) | NYSE | Technology |
| UMH split history UMH Properties, Inc | NYSE | Financials |
| UMPQ split history Umpqua Holdings Corp | NASDAQ | Financials |
| UN split history Unilever N.V. (ADR) | NYSE | Non-Cyclical Consumer Goods & Services |
| UNAM split history Unico American Corporation | NASDAQ | Financials |
| UNB split history Union Bankshares, Inc. | NASDAQ | Financials |
| UNCA split history Unica Corporation | NASDAQ | Technology |
| UNF split history UniFirst Corp | NYSE | Industrials |
| UNFI split history United Natural Foods, Inc. | NASDAQ | Non-Cyclical Consumer Goods & Services |
| UNFY split history Unify Corporation | NASDAQ | Technology |
| UNH split history UnitedHealth Group Inc. | NYSE | Healthcare |
| UNIS split history Unilife Corp | NASDAQ | Healthcare |
| UNM split history Unum Group | NYSE | Financials |
| UNP split history Union Pacific Corporation | NYSE | Industrials |
| UNS split history UNS Energy Corp | NYSE | Utilities |
| UNT split history Unit Corporation | NYSE | Energy |
| UNTD split history United Online, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| UNTK split history UniTek Global Services Inc. | NASDAQ | Industrials |
| UNTY split history Unity Bancorp, Inc. | NASDAQ | Financials |
| UNXL split history UniPixel Inc | NASDAQ | Technology |
| UPG split history Universal Power Group, Inc. | NYSEAMEX | Technology |
| UPI split history Uroplasty, Inc. | NASDAQ | Healthcare |
| UPIP split history Unwired Planet Inc | NASDAQ | Technology |
| UPL split history Ultra Petroleum Corp. | NYSE | Energy |
| UPS split history United Parcel Service, Inc. | NYSE | Industrials |
| UQM split history UQM Technologies Inc | NYSEMKT | Industrials |
| URBN split history Urban Outfitters, Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| URG split history Ur-Energy Inc. (USA) | NYSEMKT | Energy |
| URI split history United Rentals, Inc. | NYSE | Industrials |
| URRE split history Uranium Resources, Inc. | NASDAQ | Energy |
| URS split history URS Corp | NYSE | Industrials |
| URZ split history Uranerz Energy Corp. | NYSEMKT | Energy |
| USA split history Liberty All-Star Equity Fund | NYSE | Financials |
| USAC split history Usa Compression Partners LP | NYSE | Energy |
| USAK split history USA Truck, Inc. | NASDAQ | Industrials |
| USAP split history Universal Stainless & Alloy Products | NASDAQ | Basic Materials |
| USAT split history USA Technologies, Inc. | NASDAQ | Technology |
| USATP split history USA Technologies, Inc. | NASDAQ | Technology |
| USB split history U.S. Bancorp | NYSE | Financials |
| USBI split history United Security Bancshares Inc. | NASDAQ | Financials |
| USCR split history US Concrete Inc | NASDAQ | Basic Materials |
| USDP split history USD Partners LP | NYSE | Industrials |
| USEG split history U.S. Energy Corp. | NASDAQ | Basic Materials |
| USG split history USG Corporation | NYSE | Basic Materials |
| USHS split history U.S. Home Systems, Inc. | NASDAQ | Industrials |
| USLM split history U.S. Lime & Minerals Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| USM split history United States Cellular Corporation | NYSE | Telecommunications Services |
| USMD split history USMD Holdings Inc | NASDAQ | Healthcare |
| USMO split history Spok Holdings Inc | NASDAQ | Telecommunications Services |
| USNA split history USANA Health Sciences, Inc. | NYSE | Non-Cyclical Consumer Goods & Services |
| USPH split history U.S. Physical Therapy, Inc. | NYSE | Healthcare |
| USTR split history United Stationers Inc. | NASDAQ | Industrials |
| USU split history USEC Inc. | NYSE | Basic Materials |
| UTA split history Universal Travel Group | NYSE | Services |
| UTEK split history Ultratech, Inc. | NASDAQ | Technology |
| UTF split history Cohen & Steers infrastucture Fund Inc | NYSE | Financials |
| UTG split history Reaves Utility Income Fund | NYSEMKT | Financials |
| UTHR split history United Therapeutics Corporation | NASDAQ | Healthcare |
| UTI split history Universal Technical Institute, Inc. | NYSE | Industrials |
| UTIW split history UTi Worldwide Inc. | NASDAQ | Industrials |
| UTL split history Unitil Corporation | NYSE | Utilities |
| UTMD split history Utah Medical Products, Inc. | NASDAQ | Healthcare |
| UTR split history Unitrin, Inc. | NYSE | Financials |
| UTSI split history UTStarcom Holdings Corp | NASDAQ | Technology |
| UTX split history United Technologies Corporation | NYSE | Industrials |
| UUU split history Universal Security Instruments, Inc. | NYSEMKT | Technology |
| UVE split history Universal Insurance Holdings, Inc. | NYSE | Financials |
| UVSP split history Univest Corp. of PA | NASDAQ | Financials |
| UVV split history Universal Corp | NYSE | Non-Cyclical Consumer Goods & Services |
| UWBK split history United Western Bancorp, Inc. | NASDAQ | Financials |
| UWN split history Nevada Gold & Casinos | NYSEMKT | Cyclical Consumer Goods & Services |
| UXG split history U.S. Gold Corporation | NYSE | Basic Materials |