| Abbreviation | Definition |
|---|---|
| HSN | Hansen Transmissions |
| HSP | Hargreaves Services, PLC. |
| HSS | Highams Systems |
| HSTN | Hansteen Hldgs |
| HSV | Homeserve |
| HSX | Hiscox |
| HTG | Hunting |
| HTI | Hawtin |
| HTIG | Hightex |
| HTT | Hot Tuna |
| HUM | Hummingbird |
| HUW | Hampden |
| HVE | Havelock Europa, P.L.C. |
| HVN | Harvey Nash Group, P.L.C. |
| HVPE | HarbourVest Global Private Equity, Limited |
| HVT | Heavitree Brewery, P.L.C. |
| HVTA | Heavitree Brewery, P.L.C., Class A |
| HWA | Hwange |
| HWC | Highway Capital |
| HWDN | Howden Joinery |