| Humanity United |
| Hurras Network (Syrian Child Protection Network) |
| Hutchison 3G UK Limited |
| Hyperoptic Ltd |
| Hyundai Corp |
| Hyundai Energy Solutions |
| Hyundai Group |
| Hyundai Heavy Industries Co., Ltd |
| Hyundai Heavy Industries Holdings (HD Hyundai) |
| Hyundai Mobis Co Ltd |
| Hyundai Motor Company |
| I Saw It First Ltd |
| I-Am Associates |
| Iberdrola S.A. |
| Ibstock plc |
| Iceland Midco [formerly Iceland Topco Ltd] |
| ICICI Bank Ltd |
| ICICI Bank UK PLC |
| ICOMOS (International Council on Monuments and Sites) |
| ICONEM |
| ICR Research Limited |
| ID Works Consultoria Em Marketing E Producao De Eventos Ltda |
| Idara-e-Taleem-o-Aagahi |
| Ideal Boilers Limited |
| Ideal Manufacturing Ltd |