| Abbreviation | Definition |
|---|---|
| HIWDF | Highwood Resources, LTD. |
| HKHGY | Hong Kong Land Holding, LTD. |
| HKKIY | Hitachi Koki Company |
| HKTMF | Cable & Wireless HKT, Ltd. (delisted) |
| HLC | High Low Close |
| HLCL | Helical Bar |
| HLCM | Holcim PHilippines, Inc. |
| HLCN | HOLOCO, Inc. |
| HLCO | Hawaii Land & Farming Company, Inc. |
| HLCS | Helicos Biosciences |
| HLEX | HealthExtras, Inc. |
| HLFC | Home Loan Financial Corporation |
| HLIS | Halis, Inc. |
| HLIT | Harmonic, Inc. |
| HLRT | Healthrite, Inc. |
| HLTH | Healtheon/ WemMD Corporation |
| HLYW | Hollywood Entertainment Corporation |
| HMAT | Harmat Organization, Inc. |
| HMGC | H M G Worldwide Corporation |
| HMGN | Hemagen Diagnostics, Inc. |