| 1801 | HADRON CAPITAL LLP |
| 1802 | HAITONG INTERNATIONAL (UK) LIMITED |
| 1803 | HALBIS CAPITAL MANAGEMENT (UK) LIMITED |
| 1804 | HALEWOOD INTERNATIONAL FUTURES LTD |
| 1805 | HALIFAX INVESTMENT ADVISERS LTD |
| 1806 | HALIFAX PLC |
| 1807 | HALKIN ASSET MANAGEMENT LTD |
| 1808 | HALO FINANCIAL LIMITED |
| 1809 | HAMBRO SECURITIES (UK) LTD |
| 1810 | HAMBROS EQUITIES UK LTD. |
| 1811 | HAMBROS SECURITIES (UK) LTD |
| 1812 | HAMILTON CORPORATE FINANCE LIMITED |
| 1813 | HAMILTON COURT FOREIGN EXCHANGE LTD |
| 1814 | HAMILTON COURT FX LLP |
| 1815 | HAMILTON LUNN ASSET MANAGEMENT LIMITED |
| 1816 | HAMILTON LUNN LIMITED |
| 1817 | HAMILTON PHOENIX CORPORATE FINANCE LTD |
| 1818 | HAMILTON STUART CAPITAL LTD |
| 1819 | HAMILTON VENTURES |
| 1820 | HAMPSHIRE TRUST BANK PLC |
| 1821 | HAMSARD 2519 LIMITED |
| 1822 | HANOVARIAN LIMITED |
| 1823 | HANOVER PARK FINANCIAL SERVICES LIMITED |
| 1824 | HANOVER PROPERTY UNIT TRUST BOARD OF MANAGEMENT |
| 1825 | HANSA CAPITAL PARTNERS LLP |