| Soka University of America | California |
| Sokal | |
| SoKat Federal | |
| Sokely Consulting | Colorado |
| Sokol GxP Services | |
| SOL-Information Systems | Minnesota |
| sol.net Network Services | Wisconsin |
| SOLA Biosciences | |
| Sola Solutions, Inc. | |
| Solaborate | California |
| Solace IT Solutions | North Carolina |
| Solace Vision | |
| Solacom Technologies, Inc. | Illinois |
| SolAero Technologies | |
| Solai, Inc. | Delaware |
| Solamere Capital, LLC | Massachusetts |
| Solano Wireless Internet | California |
| Solar Energy Industries Association | District of Columbia |
| Solar Inbound | |
| Solar Mosaic, LLC | California |
| Solar Solution | Arizona |
| Solar Storm Software | Alaska |
| Solar.SEO | |
| SolarBiotech, Inc. | Virginia |
| Solarcycle, Inc. | California |
| Solarea Bio, Inc. | Massachusetts |
| SolaREIT | |
| Sōlaria Biō, Inc. | |
| Solaris Biotech USA | Minnesota |
| Solaris Medical Technology, Inc. | California |
| Solaris Pharma Corporation | |
| SolarMax Renewable Energy Provider, Inc. | California |
| SolarPowerSystems | |
| Solartech | New Jersey |
| Solartis, LLC | California |
| Solarus | Wisconsin |
| SolarWindow Technologies, Inc. | |
| SolarWinds Worldwide, LLC | Texas |
| SolasAI | Pennsylvania |
| Solasus Web Solutions | New York |
| SolDesign Company | Georgia |
| Solectek Corporation | California |
| Solenic Medical, Inc. | |
| Soleno Therapeutics, Inc. | |
| SolePower | Pennsylvania |
| Solera Health, Inc. | |
| Solera Holdings, Inc. | Texas |
| Soley Therapeutics | |
| Solfira Media, Inc. | California |
| Soliant Consulting, Inc. | Illinois |