| Abbreviation | Definition |
|---|---|
| HCFC | Home City Financial Corporation |
| HCGM | Here Comes Grandma, Inc. |
| HCIFF | Heritage Concepts International, Inc. |
| HCOM | Homecom Communications, Inc. |
| HCORE | Healthcor Holdings, Inc. |
| HCOW | Horizon Organic Holding Company |
| HCRI | Healthcare Recoveries, Inc. |
| HCRO | Healthtronics |
| HCSG | Healthcare Services Group, Inc. |
| HCTL | Healthcare Technology, LTD. |
| HDGC | Halsey Drug Company, Inc. |
| HDGC | Halsey Drug Company, Incorporated (de-listed) |
| HDGC | Halsey Drug Company, Incorporated (de-listed) |
| HDIE | H I E, Inc. |
| HDIH | H-D International Holdings Group |
| HDII | Hypertension Diagnostics, Inc. |
| HDIIU | Hypertension Diagnostics, Inc. |
| HDIIW | Hypertension Diagnostics, Inc. Warrants |
| HDNG | Hardinge, Inc. |
| HDP | Hortonworks Inc |