| Quantum Computing, LLC | |
| Quantum Corporation | California |
| Quantum Diamond Technologics, Inc. | Massachusetts |
| Quantum eMotion Corporation | |
| Quantum Films Software | California |
| Quantum Group | Illinois |
| Quantum Information Systems Solutions, Inc. | Michigan |
| Quantum Innovation Fund | |
| Quantum Integrators | |
| Quantum Interface, LLC | |
| Quantum IR Technologies | |
| Quantum IT Innovation | Indiana |
| Quantum Leaps, LLC | North Carolina |
| Quantum Linux Laboratories, LLC | Washington |
| Quantum Microwave, Inc. | |
| QUANTUM Multimedia | |
| Quantum Networks, LLC | New York |
| Quantum New Energy | Texas |
| Quantum Research International, Inc. | Alabama |
| Quantum Retail | Texas |
| Quantum Semiconductor, LLC | California |
| Quantum Skye Technologies | |
| Quantum Software Solutions, Inc. | Pennsylvania |
| Quantum Software, LLC | Michigan |
| Quantum Star Technologies | Idaho |
| Quantum Systems Accelerator | California |
| Quantum Technology Consulting | |
| Quantum Technology Partners | California |
| Quantum Telecommunications, Inc. | Maryland |
| Quantum Vision | |
| Quantum Workplace | Nebraska |
| Quantum World Congress | Virginia |
| Quantum X, Inc. | Virginia |
| Quantum Xchange | Maryland |
| Quantum-Si, Inc. | Connecticut |
| Quantum3D | California |
| QuantumBio, Inc. | Pennsylvania |
| Quantumcyte | California |
| Quantumcyte | |
| QuantumLight | |
| QuantumPM | Colorado |
| QuantumReverse, Inc. | |
| Quantus Creative Marketing | |
| Quardev | Washington |
| Quark Software, Inc. | Colorado |
| Quarksen, Inc. | |
| Quarksoft, LLC | New York |
| QuarkWorks | |
| QuarkXR, Inc. | |
| Quarter Note Systems, LLC | |