| 5j Design, LLC | South Dakota |
| 5MetaCom | Indiana |
| 5NINES, LLC | Wisconsin |
| 5pm | North Carolina |
| 5Points Creative | |
| 5SRC | Alabama |
| 5StarBDM | |
| 5StarDesignersis | |
| 5TEN, LLC | |
| 5th Element Marketing Group | |
| 5thColumn, LLC | Illinois |
| 5W PR | |
| 5x5 Technologies, Inc. | Florida |
| 6 River Systems, LLC | Massachusetts |
| 6. Elicere, Inc. | |
| 6. Hollman Media, LLC | |
| 605.tv | New York |
| 60AT6 | Washington |
| 60SecondMarketer | Georgia |
| 615io | |
| 630 Digital | |
| 645 Ventures | New York |
| 648 Group | California |
| 64x Bio | California |
| 64x Bio | |
| 66 degrees | Colorado |
| 6AM Marketing | |
| 6Ave Electronics | New Jersey |
| 6Connex | California |
| 6DOS, LLC | |
| 6G Web Design | New Mexico |
| 6K, Inc. | Massachusetts |
| 6Ninety9 Web Design | |
| 6nomads.com | |
| 6PS Group, LLC | |
| 6S Alternatives, LLC | |
| 6S Pharma, LLC | |
| 6scan.com | Florida |
| 6sense | California |
| 6StringMedia, Inc. | California |
| 6th Street Consulting | California |
| 7 Eagles | |
| 7 Generation Games | |
| 7 Hills Pharma, Inc. | |
| 7 Kings Code Software Solutions, LLC | |
| 7 Layer Solutions, Inc. | Illinois |
| 7 Level Telecommunications, LLC | Louisiana |
| 7 Primus Biosciences, Inc. | |
| 7 Speed Reading | Nevada |
| 7 Studios | |