| Highnote | |
| Highpoint Digital, LLC | |
| HighPoint, Inc. | California |
| HighRadius Corporation | Texas |
| HighRes Biosolutions | Massachusetts |
| Highridge, Inc. | |
| Highrise Elite Marketing | California |
| Highroad Information Technology, LLC | California |
| HighRoads | Massachusetts |
| Highspot | Washington |
| Highstreet IT Solutions, LLC | Colorado |
| Hightail, Inc. | California |
| Hightouch | California |
| Hightower Advisors | |
| Hightower Communications, Inc. | North Carolina |
| Highwaters Media, LLC | Washington |
| Highway 9 Networks | |
| Highway App, Inc. | |
| Highway1 | California |
| Highwing | Colorado |
| HighWire Press, Inc. | California |
| Higlobe | California |
| HiHello, Inc. | |
| HijiBand | Arizona |
| Hikari Medical Technologies | |
| Hiker Agency | |
| Hikru | |
| Hilary Mason | New York |
| Hilbert College Cybersecurity, B.S. | New York |
| Hilco Digital Assets | |
| HiLevel Technology, Inc. | California |
| Hilgraeve | Michigan |
| Hill & Knowlton | |
| Hill Associates | Vermont |
| Hill College | Texas |
| Hill Country Software and Support | Texas |
| Hill Productions & Media Group, Inc. | Iowa |
| Hillary Software, Inc. | New Jersey |
| HilleVax, Inc. | Massachusetts |
| Hillmann & Carr, Inc. | |
| Hillrom Company, Inc. | Illinois |
| Hillsdale College | Michigan |
| Hillside Electronics Corporation | Massachusetts |
| Hillside Software | Colorado |
| HillSouth IT Solutions | South Carolina |
| Hillstar Bio | |
| Hilltop Associates | New Jersey |
| Hilltop Venture Partners | Colorado |
| Hilltop Website Design | |
| Hilos | |