| TTM Technologies, Inc. | California |
| TTR Digital Marketing | |
| TTSLabs, LLC | |
| TTV Capital | Georgia |
| TTV Capital | |
| Tubatomic, LLC | |
| TubeMagic, LLC | |
| TubeOnAI | |
| TUBhost | California |
| Tuckerman Capital | New Hampshire |
| Tucson Affordable Web, LLC | Arizona |
| Tucson Free Unix Group | Arizona |
| Tucson Macintosh Users Group | Arizona |
| Tucson Web Creation | Arizona |
| Tucson Web Design | Arizona |
| TucsonBizz | Arizona |
| Tudor Investment Corporation | |
| Tuebora, Inc. | |
| Tuesday Capital | |
| Tuff Digital Marketing | |
| TufNut Works | New Mexico |
| Tufon Consulting | California |
| Tufts Medicine | |
| Tufts University Department of Computer Science | Massachusetts |
| Tufts University Department of Electrical and Computer Engineering | Massachusetts |
| Tufts University Department of Mathematics | Massachusetts |
| Tugboat | Rhode Island |
| TuHURA Biosciences, Inc. | Florida |
| TuiSpace | |
| Tuition.io, Inc. | |
| Tukaiz, LLC | Illinois |
| Tukatech | California |
| Tukios | Utah |
| Tukios, Inc. | Utah |
| Tula Health, Inc. | Utah |
| Tula Software | Illinois |
| TulaCo | California |
| Tulane University | Louisiana |
| Tularosa Basin Telephone Company, Inc. | New Mexico |
| TULI eServices, Inc. | New Jersey |
| Tulip Interaces, Inc. | Massachusetts |
| Tulla Media Corporation | Puerto Rico |
| Tulsa Colcate | Oklahoma |
| Tulsa Communnity College | Oklahoma |
| Tulsa Hub for Equitable & Trustworthy Autonomy | |
| Tulsa Innovation Labs | Oklahoma |
| Tulsa Internet Marketing Services | Oklahoma |
| Tulsa Marketing | |
| Tulsa Marketing Online, LLC | Oklahoma |
| Tulsa Remote | |