| Name | Ticker | ID | Release Date |
|---|---|---|---|
| Ultragenyx Pharmaceutical | RARE | 12699 | 11/18/2019 |
| UNIBANCO BRASILRS | UBB | 12590 | |
| Union Pacific | UNP | 12594 | 09/18/2002 |
| Union Pacific | UNP | 12594 | 12/09/2018 |
| United Airlines Holdings Inc | UAL | 12589 | 09/23/2002 |
| United Airlines Holdings Inc | UAL | 12589 | 12/13/2021 |
| United Financial | UBMT | 12591 | |
| United Globalcom | UCOMA | 12592 | 10/27/2001 |
| United Health Group | UNH | 12593 | |
| United Parks & Resorts | PRKS | 25552 | 11/11/2024 |
| Universal Display Corporation | OLED | 25762 | 12/02/2024 |
| UPS | UPS | 12595 | |
| Urban Outfitters, Inc. | URBN | 12596 | 11/01/2010 |
| Urban Outfitters, Inc. | URBN | 12596 | 10/24/2012 |
| Urban Outfitters, Inc. | URBN | 12596 | 04/04/2018 |
| US Cellular | USM | 12597 | 11/13/2004 |
| US Ecology | ECOL | 12689 | 04/22/2019 |
| US LEC Corporation | CLEC | 12388 | 02/06/2002 |