| Ultra Maritime Naval Systems and Sensors MA | Manufacturing | 0 | — | A |
| Ultra Maritime Naval Systems and Sensors NC | Professional & Technical Services | 0 | — | A |
| Ultra Maritime Naval Systems and Sensors VA | Professional & Technical Services | 0 | — | A |
| Ultra Optics MN | Manufacturing | 0 | — | F |
| Ultra Performance Sports LLC CA | Retail Trade | 1 | $79,040 | — |
| Ultra Poly Inc. WA | Manufacturing | 0 | — | C |
| Ultra Precision, Inc. PA | Manufacturing | 0 | — | A |
| Ultra Premium Oilfield, LTD TX | — | 0 | — | — |
| Ultra Premium Services, LLC OH | — | 0 | — | — |
| Ultra Prime Logistics TX | Transportation & Warehousing | 0 | — | F |
| Ultra Pro CA | — | 0 | — | — |
| Ultra Safe Nuclear Corporation TN | Professional & Technical Services | 0 | — | A |
| Ultra Safe Nuclear Corporation WA | Professional & Technical Services | 0 | — | A |
| Ultra Services, Inc. MA | Construction | 0 | — | F |
| Ultra Steel & Access, Inc. CA | Manufacturing | 0 | — | D |
| Ultra Tab Laboratories, Inc. NY | Manufacturing | 0 | — | A |
| Ultra Tech Machinery OH | Manufacturing | 0 | — | A |
| ULTRA TOKYO CONNECTION, LLC CA | Transportation & Warehousing | 0 | — | A |
| Ultra Tool and Manufacturing NY | Manufacturing | 0 | — | A |
| Ultra Utilities Construction, LLC MD | Construction | 0 | — | F |
| Ultra Yield Micronutrients WA | Manufacturing | 0 | — | F |
| Ultra-met OH | Manufacturing | 0 | — | F |
| Ultra-Poly Corporation PA | Manufacturing | 0 | — | A |
| Ultra-Poly Corpration PA | Manufacturing | 0 | — | F |
| Ultracraft NC | Manufacturing | 0 | — | D |
| Ultradent Products, Inc. UT | Manufacturing | 0 | — | C |
| Ultrafab KS | Manufacturing | 0 | — | F |
| Ultrafab NY | Manufacturing | 0 | — | C |
| Ultrafab SC | Manufacturing | 0 | — | F |
| Ultraflo Corporation MO | Manufacturing | 0 | — | A |
| Ultraform Industries MI | Manufacturing | 0 | — | F |
| Ultrafryer Systems, LLC TX | — | 0 | — | — |
| Ultragenyx Pharmaceutical Inc. MA | Manufacturing | 0 | — | A |
| Ultragenyx Pharmaceutical, Inc. CA | Manufacturing | 1 | $137,072 | — |
| ULTRALawn Company IA | Administrative & Waste Services | 0 | — | A |
| Ultraleap Inc. CA | Professional & Technical Services | 0 | — | A |
| Ultralife Corp NY | Manufacturing | 0 | — | D |
| Ultralife Corp VA | Manufacturing | 0 | — | A |
| Ultralox MN | Transportation & Warehousing | 0 | — | A |
| Ultralox Interlocking Technology MN | Manufacturing | 0 | — | F |
| ULTRAMET CA | Manufacturing | 0 | — | A |
| UltraPRO International, LLC CA | Manufacturing | 0 | — | B |
| UltraPure Systems, Inc PR | Manufacturing | 1 | $47,840 | — |
| UltraSource LLC MO | Manufacturing | 0 | — | C |
| ULTRATEC SPECIAL EFFECTS INC AL | Manufacturing | 0 | — | D |
| Ultratech Inc IL | Manufacturing | 0 | — | A |
| Ultraviolet Devices, Inc. CA | Manufacturing | 0 | — | A |
| ULVAC Technologies, Inc. MA | Manufacturing | 0 | — | A |
| Ulysses American Gastropub DE | — | 0 | — | — |
| Ulysses Ecosystem Engineering Inc. CA | Professional & Technical Services | 3 | $163,333 | — |
