| QURE | uniQure N.V. | Healthcare | $2.7B | — | 0 |
| UATCY | Unisound AI Technology Co., Ltd./ADR | — | — | — | 0 |
| UIS | Unisys Corporation | Technology | $172M | — | 0 |
| UAC-UN | United Acquisition Corp I | — | — | — | 0 |
| UAL | United Airlines Holdings, Inc. | Industrials | $36.1B | — | 0 |
| UBCP | United Bancorp, Inc. | Financial Services | $87.8M | — | 0 |
| UBOH | United Bancshares, Inc. | Financial Services | $110M | — | 0 |
| UBSI | United Bankshares, Inc. | Financial Services | $6.4B | — | 0 |
| UCB | United Community Banks, Inc. | Financial Services | $4.1B | — | 0 |
| UFCS | United Fire Group, Inc. | Financial Services | $1.4B | — | 0 |
| UEEC | United Health Products, Inc. | Healthcare | $9.0M | — | 0 |
| USEA | United Maritime Corporation | Industrials | $28.9M | — | 0 |
| UMC | United Microelectronics Corporation | Technology | $60.1B | — | 0 |
| UNFI | United Natural Foods, Inc. | Consumer Defensive | $2.8B | — | 0 |
| UPS | United Parcel Service, Inc. | Industrials | $78.2B | — | 0 |
| PRKS | United Parks & Resorts Inc. | Consumer Cyclical | $1.5B | — | 0 |
| URI | United Rentals, Inc. | Industrials | $63.6B | — | 0 |
| UNL | United States 12 Month Natural Gas Fund, LP | — | — | — | 0 |
| USL | United States 12 Month Oil Fund | — | — | — | 0 |
| UAMY | United States Antimony Corporation | Basic Materials | $677M | — | 0 |
| AETN | United States Basketball League, Inc. | — | — | — | 0 |
| BNO | United States Brent Oil Fund LP | — | — | — | 0 |
| CPER | United States Commodity Index Funds Trust | — | — | — | 0 |
| UGA | United States Gasoline Fund, LP | — | — | — | 0 |
| USLM | United States Lime & Minerals, Inc. | Basic Materials | $3.1B | — | 0 |