| Heavy Construction Systems Specialists, LLC | Texas |
| Heavy Hammer, Inc. | |
| Heavy Hits, LLC | Washington |
| Heavy Iron Studios, Inc. | California |
| Heavy.ai | California |
| HeavyDuty Branding, Inc. | |
| Hebbia, Inc. | |
| Hebbia, Inc. | |
| HebeCell Corporation | Massachusetts |
| Hecate Software, Inc. | Washington |
| Heddle Marketing, LLC | |
| Hedera Hashgraph, LLC | |
| HedgeCo Websites | Florida |
| Hedgehog | California |
| Hedgehog Hosting | Virginia |
| Hedges & Company | |
| Hedra | |
| Hedvig, Inc. | California |
| Hedy AI, LLC | |
| Heeler | |
| Heels and Tech | |
| HEICO Corporation | |
| Heidelberg University | Ohio |
| Heidi | |
| Heidrick & Struggles International, Inc. | Illinois |
| Height Capital Markets | |
| Height Connect, Inc. | |
| Heights Tower Systems, Inc. | Florida |
| Heiko Group, Inc. | Florida |
| Heila Technologies | Massachusetts |
| Heine Ventures, LLC | Kentucky |
| Heinzeroth Marketing Group | |
| Heirloom Carbon Technologies | |
| Heirloom Computing, Inc. | California |
| Heka Global, Inc. | |
| Heka Interactive | Oregon |
| Helen Thompson Media | |
| Helena Laboratories Corporation | Texas |
| Helenzys, Inc. | |
| Helex Bio | New York |
| Helia Care | Arizona |
| Helical Communications Technologies | |
| Helicon Tech | Virginia |
| Helicone, Inc. | |
| Helicore | |
| HELIENE, Inc. | |
| Heligenics | Nevada |
| Helio Genomics | California |
| Helion | |
| Helios AI | |