| Harvey Mudd College | Academic & Science |
| Hero Music Company | Business |
| Harvard Management Company | Business |
| Hainan Mazda Corporation | Business |
| Hornberger Management Company | Business |
| HUMINT Management Center | Business |
| Hospitality Management Corporation | Business |
| Hussung Mechanical Contractors | Business |
| Hyundai Motor Corporation | Business |
| Horowhenua Motor Company | Business |
| Hybris Management Console | Business |
| Hercules Machinery Corp | Business |
| Hydromet Corporation Ltd | Business |
| Hospitality Marketing Concepts | Business |
| Herd Management Control | Business |
| Hardware Management Console | Business |
| Handcraft Mattress Company | Business |
| Harbert Management Corporation | Business |
| Honda Motor Corp | Business |
| Honda Motor, LTD. | Business |
| Herron Maintenance Company | Business |
| Hospitality Management Council | Community |
| Heavy Metal Content | Community |
| Halal Monitoring Committee | Community |
| Hope Medical Clinic | Community |
| Headmasters' and Headmistresses' Conference | Community |
| Hawk Mountain Council | Community |
| Heavy Metal Club | Community |
| Hazy Maze Cave in Super Mario 64 | Computing |
| Home Media Center | Computing |
| High Speed Memory Controller | Computing |
| Horizon Mobile Communications | Computing |
| Hamdan Coin | Cryptocurrency |
| Highly Motivated Consultancy | General |
| High Motion Class | General |
| Heseltine Mok Consultants | General |
| House Master Cam | General |
| Hawaiis Most Cheated | General |
| Halibut Milk Catalog | General |
| Horizontal Machining Center | General |
| Hoffman Modulation Contrast | General |
| Hosted Messaging and Collaboration | General |
| Hard Multi Coating | General |
| How might Claire | General |
| Healey Motor Company | General |
| Helvetic Motor Company | General |
| Habitation Module Complex | General |
| Honda Motor Company | General |
| Hyundai Mobis Company | General |
| Haima Motor Corporation | General |
| Human Mouthed Cat | General |
| High Mileage Club | General |
| Historic Muscle Cars | General |
| Hungarian Multicultural Center | General |
| Highly Motorised Country | General |
| Holland Motorsports Complex | General |
| Havana Motor Club | General |
| Houston Miata Club | General |
| Heritage Motor Centre | General |
| Heartland Miata Club | General |
| Hyundai Modified Club | General |
| Hyundai Map Care | General |
| Hino Motors Canada | General |
| Handmade Car | General |
| Historic Motor Club | General |
| Harry Miller Club | General |
| Hoosier Mustang Club | General |
| Holly Marie Combs | General |
| High Moisture Corn | General |
| Highly Marrinated Chicken | General |
| Heavy Metal Core | General |
| Hello Master Cammy | General |
| Hubcaps Mini Club | General |
| High Mating Cycles | General |
| Halley Multicolor Camera | General |
| Homo Mega Cocker | General |
| Hybrid Memory Cube | General |
| Horizontal Machining Centers | General |
| Hamiltonian Monte Carlo | General |
| Hoya Multi Coating | General |
| Head Motion Correction | General |
| Higher Mathematical Content | General |
| Herbal Medicines Compendium | General |
| Honda Motor Co | General |
| House Master C | General |
| Healthy Mediterranean Cuisine | General |
| Hot Medium and Cool | General |
| Helping Migrants Cross | General |
| Harvard Model Congress | General |
| Hyper Mysterious Chaos | General |
| Hyundai Motor Company | General |
| Hoya Multi Coated | General |
| His Majesty's Cutter | Governmental |
| Hospital Corpsman Chief Petty Officer | Governmental |
| Halton Multicultural Council | Governmental |
| Hyderabad Municipal Corporation | Governmental |
| Home Manufacturers Council | Governmental |
| Hybrid MicroCircuit | Governmental |
| Hypergolic Maintenance and Checkout | Governmental |
| High Mobility Camouflage | Governmental |
| Hadssa Medical Center | Medical |
| Harborview Medical Center | Medical |
| Hadassah Medical Center | Medical |
| Hilo Medical Center | Medical |
| Hershey Medical Center | Medical |
| Healthy Medical Consultancy | Medical |
| Hardin Medical Center | Medical |
| Harrisburg Medical Center | Medical |
| Hopkins Medical Center | Medical |
