| HDMI Licensing Administrator, Inc. | California |
| HDMZ | Illinois |
| HDPixel | California |
| hDrop Technologies, Inc. | Arkansas |
| HDSF | California |
| HDSNE | New Hampshire |
| HDT Bio | Washington |
| HDWebProvider | Texas |
| HDWP | New York |
| he Voice User Interface Company, LLC | South Carolina |
| Head Networks | New Hampshire |
| Headache Sciences, Inc. | |
| Headaway Idea Labs | Texas |
| HeadHunting, Inc. | |
| Headline | California |
| Headout, Inc. | |
| HeadRace | Texas |
| Heads Up Health | Arizona |
| Headset Adapter Co. | Connecticut |
| Headset Experts | Texas |
| Headset Plus | California |
| Headset Zone | Illinois |
| HeadsetBuddy.com | Texas |
| Headsets Direct | Arizona |
| Headsets.com | California |
| HeadSpin | California |
| HeadSpin Software, LLC | Massachusetts |
| Headspring, LLC | Texas |
| Headstorm Studios | |
| HeadsUp | California |
| Headsup Corporation | |
| headTrix, Inc. | California |
| Headwall Photonics, Inc. | Massachusetts |
| Headway | California |
| Headway App, Inc. | California |
| Headway, Inc. | |
| Heady, LLC | |
| HEAL Security, Inc. | |
| HEAL Software, Inc. | California |
| Healex Systems Ltd | Delaware |
| Healgen | |
| Healgen Scientific | |
| Healhcare Master Data Managemen | |
| Healia | |
| Healionics | Washington |
| Healis Therapeutics, Inc. | |
| Healogics, LLC | |
| Healogix, LLC | Pennsylvania |
| HealPay | Michigan |
| HealPros | Georgia |