| Quadrant Alpha Technology Solutions, Inc. | |
| Quadrant Biosciences, Inc. | New York |
| Quadrant Data Solutions, LLC | Pennsylvania |
| Quadrant Information Security | |
| Quadrant Software | Massachusetts |
| Quadrant Technologies | |
| Quadratic Growth, Inc. | |
| Quadric Software, Inc. | Vermont |
| Quadric.io | |
| Quadriga BioSciences, Inc. | California |
| Quadros Systems, Inc. | Texas |
| Quadrus Corporation | Alabama |
| Quadsimia | New York |
| QuadStar Digital Guidance Ltd | Ohio |
| Quadtec Solutions, Inc. | Virginia |
| Quadyster | Iowa |
| Quagen Pharmaceuticals | |
| Quail Electronics, Inc. | California |
| Quake Capital Partners | Texas |
| Quake Global | California |
| Quaker Partners Management, L.P. | Pennsylvania |
| Quakmedia | |
| Qualaroo | Texas |
| Qualastat Electronics, Inc. | Pennsylvania |
| Qualcomm Technologies, Inc. | California |
| Qualcomm Ventures | California |
| Qualcy | California |
| Qualer | California |
| Qualex Consulting Services, Inc. | Florida |
| Qualia Labs, Inc. | |
| Qualicaps | North Carolina |
| Qualifacts | |
| Qualified.com, Inc. | |
| Qualint | Utah |
| Qualis Corporation | Alabama |
| Qualis Health | Washington |
| Qualis Research | Colorado |
| Qualisoft | Utah |
| Qualisystems Ltd | California |
| Qualiti | Utah |
| Qualitrol International | North Carolina |
| QualitrolTech, Inc. | Colorado |
| Quality Agents, LLC | Maryland |
| Quality America, Inc. | Arizona |
| Quality and Compliance Consulting, Inc. | California |
| Quality Biological | |
| Quality Bioresources | Texas |
| Quality Business Solutions | |
| Quality Cable Source, Inc. | Illinois |
| Quality CDMO | |