| Quantix SCS, LLC TN | Transportation & Warehousing | 0 | — | B |
| Quantix SCS, LLC TX | Transportation & Warehousing | 0 | — | A |
| Quantix SCS, LLC WV | Transportation & Warehousing | 0 | — | C |
| Quantlab Financial, LLC TX | Finance & Insurance | 1 | $84,843 | — |
| Quantom Tech LLC CO | Professional & Technical Services | 1 | $106,000 | — |
| Quantom Tech LLC TX | Professional & Technical Services | 1 | $135,699 | — |
| quantPORT Division of Jeffries Investment Advisers, LLC (NYC) NY | — | 0 | — | — |
| Quantum Code Consultancy Services LLC FL | Professional & Technical Services | 1 | $85,363 | — |
| Quantum Companies, Inc. MI | Construction | 0 | — | A |
| Quantum Controls Inc MD | Construction | 0 | — | C |
| Quantum Corporation CA | Manufacturing | 0 | — | A |
| Quantum Corporation CO | Manufacturing | 0 | — | A |
| Quantum Corporation MN | Manufacturing | 0 | — | A |
| Quantum Design CA | Manufacturing | 0 | — | F |
| Quantum Design Inc. IL | Manufacturing | 0 | — | F |
| Quantum Devices, Inc WI | Manufacturing | 0 | — | A |
| Quantum Diamond Technologies, Inc. MA | Professional & Technical Services | 1 | $108,000 | — |
| Quantum Energy Holdings, LLC FL | — | 0 | — | — |
| Quantum Energy Partners (2020), LLC TX | Finance & Insurance | 1 | $160,000 | — |
| Quantum Fuel Systems LLC CA | Manufacturing | 0 | — | D |
| Quantum Fuel Systems Technologies CA | — | 0 | — | — |
| Quantum General Contractors, Inc. IN | Construction | 0 | — | A |
| Quantum Graphics, Inc. MN | Manufacturing | 0 | — | D |
| Quantum Health Professionals, Inc. MO | Administrative & Waste Services | 2 | $62,400 | — |
| Quantum Health, Inc. d/b/a Promise CA | — | 0 | — | — |
| Quantum Healthcare Inc. OH | Healthcare & Social Assistance | 0 | — | A |
| Quantum Holdings, LLC WA | Manufacturing | 0 | — | F |
| Quantum Hug, Inc. CA | Information & Media | 1 | $173,000 | — |
| Quantum Ink KY | Manufacturing | 0 | — | F |
| Quantum Integrators Group LLC NJ | Professional & Technical Services | 27 | $9,628,119 | — |
| Quantum Lean LLC dba Mac Machine MD | Manufacturing | 0 | — | A |
| Quantum Marine Engineering, Inc FL | Retail Trade | 0 | — | D |
| Quantum Materials, LLC NC | Manufacturing | 0 | — | A |
| Quantum Medical Imaging, LLC, a subsidiary of Carestream Health, Inc. NY | — | 0 | — | — |
| Quantum Mold & Engineering, LLC MI | Manufacturing | 0 | — | A |
| Quantum North Amercia TX | Construction | 0 | — | F |
| Quantum North America TX | Construction | 0 | — | F |
| QUANTUM OPS INC. TX | Professional & Technical Services | 1 | $105,997 | — |
| Quantum Plastics AR | Manufacturing | 0 | — | B |
| QUANTUM SYSTEMS GROUP, INC. NJ | Professional & Technical Services | 11 | $96,183 | — |
| QUANTUM TECHNOLOGIES LLC NE | Professional & Technical Services | 2 | $57,627 | — |
| QUANTUM TECHNOLOGIES LLC OK | Professional & Technical Services | 14 | $82,325 | — |
| QUANTUM TECHNOLOGIES LLC TX | Professional & Technical Services | 12 | $82,718 | — |
| QUANTUM TECHNOLOGIES, INC. VA | Professional & Technical Services | 4 | $101,400 | — |
| Quantum Technology Group, LLC GU | Professional & Technical Services | 2 | $51,522 | — |
| Quantum Vision, LLC MD | Professional & Technical Services | 6 | $116,646 | — |
| Quantum-Si, Incorporated CT | Professional & Technical Services | 1 | $157,500 | — |
| QuantumID Technologies MA | Professional & Technical Services | 2 | $103,022 | — |
| QuantumScape Battery CO | — | 0 | — | — |
| QuantumScape Battery, Inc. CA | Manufacturing | 17 | $154,213 | C |
