Below is a list of influential companies beginning with H.
- Hasbro Inc.
- Halliburton
- The Home Depot
- Holmes Place
- HSBC
- Hilcorp Energy Company
- Hyland Real Estate Brokerage
- Henderson Industries
- H.J. Heinz Company
- Harman International Industries Inc.
- Highland Capital Management
- Hunt Oil Company
- Huntsman Corporation
- Hologic
- HRAA
- Horizons Clinical Research Center
- Hachette Book Group