| Tandym Group | New York |
| TANET, Inc. | Washington |
| Tangelo Digital Media | |
| Tangent Systems, Inc. | Illinois |
| Tangent Technologies | |
| Tangent, Inc. | California |
| Tangerine Creative Agency | |
| Tangerine Power | |
| Tangia | |
| Tangible Security | Maryland |
| Tangicloud Technologies, Inc. | Colorado |
| Tangli, Inc. | |
| Tango | Texas |
| Tango Biosciences | |
| Tango Card, Inc. | |
| Tango Networks, Inc. | Texas |
| Tango Technology, Inc. | California |
| Tango Therapeutics | |
| TangoCode | Illinois |
| Tangoe | New Jersey |
| Tangra | |
| Tanis Communications | |
| Tanisha Systems, Inc. | New York |
| Tanisha Systems, Inc. | |
| Tanium, Inc. | Washington |
| TANK New Media, LLC | |
| Tanner Pharma Group | |
| Tanner Pontius Digital Design | |
| Tanner Research | California |
| Tannermark | Georgia |
| Tanooki Labs, LLC | |
| Tanvas | Illinois |
| Tanvex BioPharma, Inc. | |
| Tanya Beaudoin | Colorado |
| Tao Capital Partners | |
| TAO Connect, Inc. | |
| Tao Digital Solutions, Inc. | California |
| Tao Interactive, Inc. | North Dakota |
| Taos | California |
| TaosNet | New Mexico |
| Taoti Creative | |
| TAP Solutions | California |
| Tapatalk, Inc. | California |
| TapBlaze | California |
| Tapbots, LLC | |
| TapChat, LLC | |
| Tapcheck | Texas |
| TapClicks | California |
| TAPCREPAIR | New York |
| Tape-Tel Electronics | New Jersey |