| Hi5s, Inc. | Delaware |
| HiArc | |
| Hiatus, Inc. | New York |
| HiberCell, Inc. | New York |
| Hibernate | North Carolina |
| Hibersense | Pennsylvania |
| Hibob, Inc. | New York |
| Hibu, Inc. | Pennsylvania |
| Hickory Computer | North Carolina |
| HiConversion, Inc. | Florida |
| HID Global Corporation | Texas |
| Hidden Door | New York |
| Hidden Gears, LLC | New York |
| Hidden Level | |
| HiddenLayer | Texas |
| HiddenLevers | Georgia |
| Hide & Seek Media, LLC | |
| Hide.me | |
| Hideez Group, Inc. | Delaware |
| Hidef Lifestyle | Pennsylvania |
| Hieroweb Interactive | California |
| HiFiBiO Therapeutics, Inc. | |
| Hifinite | |
| Higdong, Inc. | Maryland |
| Higglo Digital | |
| High 5 Games | New York |
| High 5 Software | Washington |
| High Alpha | Indiana |
| High Clarity | California |
| High Country Wire and Telephone | Colorado |
| High Desert Internet Services | California |
| High Energy Media Consultants, LLC | Georgia |
| High Fidelity, Inc. | California |
| High Five! Creative | |
| High Frequency Power, LLC | Vermont |
| High Impact | |
| High Impact Games | California |
| High Impact Media Solutions | |
| High Level Marketing, LLC | Michigan |
| High Moon Studios | California |
| High Mountain Ventures, LLC | Ohio |
| High Peak Software, Inc. | |
| High Plains Technology | South Dakota |
| High Point Aerotechnologies | Texas |
| High Point Networks | North Dakota |
| High Point SEO & Marketing CT | |
| High Point University | North Carolina |
| High Purity New England | Rhode Island |
| High Quality Web Solutions | |
| High Rev Applications | Idaho |