| Thermoflow, Inc. | Massachusetts |
| ThermoGenesis Holdings, Inc. | California |
| ThermopeutiX, Inc. | California |
| Thermopylae Sciences + Technology | Virginia |
| ThernLoven, LLC | |
| Theromics, Inc. | Massachusetts |
| TheSearchGuru | |
| TheServerSide | Massachusetts |
| Theseus | |
| Thesis | Missouri |
| Thesis Ventures | Florida |
| Thesis, Inc. | |
| TheSiteCrew.com | |
| theSOULwithin | Texas |
| TheSpider, Inc. | California |
| TheSpider, Inc. | |
| TheSpyPhone.com | Washington |
| TheStartupleads | |
| Thesys Group, Inc. | New York |
| Thesys, Inc. | |
| Theta Lake, Inc. | California |
| ThetaRay | |
| ThetaWae AI, Inc. | |
| Thetis Pharmaceuticals, LLC | |
| TheTrainingCo, LLC | South Carolina |
| Theunpluggedweb | |
| TheVentureCity | Florida |
| Thevisiontech | |
| TheWebBuzz | Pennsylvania |
| TheWebDesignPartners.com | Florida |
| TheWell Bioscience, Inc. | New Jersey |
| Thexconcept | California |
| TheySaid | |
| THG | Pennsylvania |
| THG Energy Solutions, LLC | |
| THIEL | |
| Thiel College | Pennsylvania |
| Thiking Minds, Inc. | Nevada |
| ThikMedia | Texas |
| Thill Design | Wisconsin |
| Thin Air | Colorado |
| Thin Line Capital | |
| Thinaer | Texas |
| ThinAir Telematics | Texas |
| Thinaire Transmedia Network, Inc. | |
| Thinc Design | |
| ThinClient Computing, LLC | Arizona |
| Thincloud, LLC | California |
| ThingsBoard | |
| Thinix | Iowa |