| Hartman Technology, Inc. | |
| Hartmann Software Group, LLC | Colorado |
| Hartmann Technology | South Dakota |
| Hartnell College | California |
| Harton, Inc. | |
| Hartwick College | New York |
| Hartzell Aviation | |
| Harvard Battery | New Jersey |
| Harvard Bioscience, Inc. | Massachusetts |
| Harvard Business Review | Massachusetts |
| Harvard Business School | Massachusetts |
| Harvard Computing Group, Inc. | Massachusetts |
| Harvard Medtech | Nevada |
| Harvard Quantum Intiative | Massachusetts |
| Harvard University | Massachusetts |
| Harvard University Department of Mathematics | Massachusetts |
| Harvard University Innovation Labs | Massachusetts |
| Harvard University John A. Paulson School of Engineering and Applied Sciences Computer Science | Massachusetts |
| Harvest | New York |
| Harvest Automation, Inc. | Massachusetts |
| Harvest Moon Pharmaceuticals USA, Inc. | Virginia |
| Harvestr | New York |
| Harvey | California |
| Harvey Mudd College | California |
| Harvey Mudd College Department of Computer Science | California |
| Harvey Mudd College Department of Mathematics | California |
| Harvey Software, Inc. | Florida |
| Harwood Consulting, Inc. | Florida |
| Hasco Relays and Electronics International Corporation | New York |
| HasenTech | |
| Hash App | Florida |
| Hashcash Consultants | California |
| HashiCorp | California |
| Hashone Global, Inc. | |
| Hashout Technologies, Inc. | California |
| Hashrocket | Florida |
| Hashseven, Inc. | |
| Hashtag Applications | Florida |
| Haskell Indian Nations University | Kansas |
| Hasman Enterprise Solutions, Inc. | New Jersey |
| Hassan Consulting, LLC | South Dakota |
| Hasse, Inc. | California |
| Hassler Communication Systems Technology, Inc. | Ohio |
| Hastings College | Nebraska |
| Hastings Research, Inc. | Nevada |
| Hasura, Inc. | California |
| Hasz Studios, LLC | Florida |
| Hat Boy Software, Inc. | Mississippi |
| Hatch | New York |
| Hatch Baby, Inc. | |