- Halifax Fund Management Limited
- Halifax Investment Advisers Ltd
- Halifax Investment Services Limited
- Halifax Plc
- Halifax Share Dealing Limited
- Halifax Unit Trust Management Ltd
- Hambro Clearing Ltd
- Hambro Securities (uk) Ltd
- Hambros Equities Uk Ltd.
- Hambros Securities (uk) Ltd
- Hamilton Corporate Finance Limited
- Hamilton Lunn Asset Management Limited
- Hamilton Lunn Limited
- Hamilton Ventures
- Hamilton-phoenix Corporate Finance Ltd
- Hamsard 2519 Limited
- Hanovarian Limited
- Hanover Park Financial Services Limited
- Hanover Property Unit Trust Board Of Management
- Hansa Capital Partners Llp
- Hansard Fund Managers Ltd
- Hanson Capital Investments Limited
- Harbourvest Partners (u.k.) Limited
- Hargreave Hale Ltd
- Hargreaves Lansdown
- Harmsworth Pension Investment Management
- Harpenden Building Society
- Harriett-lever International (trust) Ltd
- Harrison Lovegrove And Co. Limited
- Harrods Bank Limited
- Hasan Financial Corporation Ltd.
- Hathaway Investment Management Limited
- Havelock Hunter Stockbrokers Limited
- Hawkpoint Partners Limited
- Hawksmoor Investment Management Limited
- Hawthorne Securities Ltd
- Haymarket Financial Llp
- Haywood Securities Uk Limited
- Hazel Capital
- Hazel Capital Llp
- Hb Markets Plc
- Hbk Europe Limited
- Hbk Europe Management Llp
- Hbos Investment Fund Managers Limited
- Headstart Advisers Ltd
- Healey And Baker Corporate Finance Limited
- Healey Baker Financial Services Ltd
- Heartwood Wealth Management Limited
- Hed Capital Ltd
- Heddon M J
- Hedge Fund Marketing Limited
- Hedley And Co
- Helaba Financial Futures Ltd
- Helix Associates Limited
- Helms Brown And Company
- Helvea Limited
- Henderon Investment Funds Ltd
- Henderson Administration Limited
- Henderson Crosthwaite Limited
- Henderson Equity Partners Limited
- Henderson Fund Management Plc
- Henderson Global Investors Limited
- Henderson Investment Funds Limited
- Henderson Investment Management Limited
- Henderson Rowe
- Henderson Touche Utm
- Henry Cooke Corporate Finance Ltd.
- Henry Cooke, Lumsden Plc
- Henyep Investment (uk) Limited
- Herald Investment Management Limited
- Heriot Funds Management
- Heritable Bank Public Limited Company
- Hermes Focus Asset Management Limited
- Hermes Investment Management Ltd
- Herzog Heine Geduld International Limited
- Hess Energy Trading (uk) Limited
- Hev (holdings) Ltd
- Hewitt Associates Limited
- Hewitt Bacon And Woodrow Investment Consulting Limited
- Hewlett - Packard Limited
- Hg Investment Managers Ltd
- Hg Pooled Management Limited
- Hifx Plc
- Highbridge Capital Management (uk) Ltd
- Hill Osborne And Co.
- Hill Samuel Asset Management International Ltd
- Hills Independent Traders Limited
- Him Capital Limited
- Hinckley And Rugby Building Society
- Hobart Capital Markets Limited
- Hoegh Capital Partners Limited
- Hoenig And Co
- Hofmann Investment Management (uk) Limited
- Holborn Bars Nominees Ltd.
- Hoodless Brennan Plc
- Horizon Asset Ltd
- Horizon Investment Services Ltd
- Horseman Capital Management Limited
- Hottinger And Co Limited
- Howles And Company Limited
- Hsbc Actuaries And Consultants Limited
- Hsbc Bank Stockbrokers
- Hsbc Greenwell
- Hsbc Infrastructure Fund Management Limited
- Hsbc Specialist Fund Management Limited
- Hsbc Trust Company (uk) Ltd
- Hudson River Trading Europe Ltd
- Hufkens Asset Management And Co Ltd
- Huldt Investment Management Limited
- Hull Trading
- Hunting Knightsbridge Holdings Ltd
- Hutchinson Lilley Investments
- Hutchinson Vecchini Asset Management Ltd
- Hybridan Llp
- Hydra Associates Financial Services Ltd
- Hydra Capital Management Ltd
- Hythe Securities Limited
- Hyundai Securities (europe) Ltd
- I.g. Index Public Limited Company
- IA PRITCHARD STOCKBORKERS LTD
- IA PRITCHARD STOCKBROKERS LTD.
- ICAP ELECTRONIC BROKING LTD
- ICAP SECURITIES LTD
- ICBC (LONDON) LIMITED
- ICE CLEAR EUROPE LIMITED
- ICICI BANK UK PLC
- INDUSTRIAL BANK OF KOREA LONDON BRANCH
- ING (LONDON) (NO.11) LIMITED
- ING BANK N.V., LONDON BRANCH
- ING BANK N.V., LONDON BRANCH, EQUITY SETTLEMENTS
- INNOVATION SQUARED LIMITED
- INSIGHT INVESTMENT MANAGEMENT (INTERNATIONAL) LIMITED
- INSTINET EUROPE LIMITED
- INTELLI CORPORATE FINANCE LIMITED
- INTERACTIVE BROKERS (U.K.) LTD
- INTERCONTINENTAL BANK (UK) PLC
- INTERNATIONAL FINANCIAL DATA SERVICES (UK) LTD
- INTESA SANPAOLO SPA LONDON (FORMERLY BANCA INTESA S.P.A. LONDON)
- INTL GLOBAL CURRENCIES LTD.
- INVESCO ASSET MANAGEMENT LTD.
- INVESTEC BANK PLC
- INVESTEC WEALTH AND INVESTMENT LIMITED
- IRISH BANK RESOLUTION CORPORATION LIMITED
- IRRFC
- ISLAMIC BANK OF BRITAIN PLC
- ISRAEL DISCOUNT BANK LTD
- Iaf Securities Limited
- Iai International Ltd
- Ibj Capital Management Ltd
- Ibj Nomura Financial Products Plc
- Ibm Uk Pensions Trust Ltd
- Icap Corporates Llc London Branch
- Icap Energy Limited
- Icap Shipping Tanker Derivatives Limited
- Icci (uk) Ltd.
- Ice Securities Limited
- Ici Chemicals And Polymers Limited
- Ici Investment Management Limited
- Icma Ltd
- Icon Capital Limited
- Idea Bank Ltd
- Idealing.com Limited
- Idemitsu International (europe) Public Limited Company
- Idj Ltd
- Ids International Limited
- Ifg Capital Limited
- Ifx Ltd
- Ig Group Holdings Plc.
- Ig Markets
- Ignis Investment Services Limited
- Iimia Plc
- Ik Investment Partners Limited
- Ikb Deutsche Industriebank Aktiengesellschaft
- Ikon Capital Limited
- Ikos Partners
- Ikos Securities Ltd
- Ilex Asset Management (uk) Llp
- Illiquidx Limited
- Illiquidx Llp
- Im Wealth Services
- Imas Corporate Advisors Limited
- Imc Securities B.v., London Branch
- Imi Capital Markets (uk) Limited
- Imi Web (uk) Ltd
- Impax Asset Management Limited
- Impax Capital Limited
- Impivaara Securities Ltd
- Incavest Securities Limited
- Ind-x Securities Ltd
- Independent Capital Corporation Limited
- Independent Derivative Traders Limited
- Independent Investment Management Ltd
- Independent Investor Services Limited
- Independent Strategy Limited
- India Advisory Partners Limited
- Indicus Advisors Llp
- Indigo Capital Partners Limited
- Indocam
- Indosuez Capital Ltd
- Indosuez Carr Futures Inc.
- Indosuez W.i. Carr Securities (uk) Limited
- Industrial Common-ownership Finance Limited
- Industrial Technology Securities Ltd
- Ineos Holdings Limited
- Infinity Capital Markets Limited
- Infinity Capital Markets Llp
- Infinity Global Markets Ltd.
- Infinium Capital (uk) Limited
- Infotrend Limited
- Ing Derivatives (london) Limited
- Ingenious Asset Management Limited
- Ingenious Securities Limited
- Innisfree Limited
- Innvotec Limited
- Insight Investment Management (global) Limited
- Insinger De Beaufort
- Insinger De Beaufort (acd) Limited
- Insinger Finance (uk) Ltd
- Insparo Asset Management
- Instinet Global Services Limited
- Instinet Investment Services Limited
- Institutional Cash Distributors Limited
- Integrated Financial Arrangements Plc
- Integrated Financial Products Ltd
- Intelligent Managed Services Limited
- Interactive Brokers Llc
- Interactive Investor Trading Limited
- Intercapital Bonds Limited
- Intercapital Brokers Ltd
- Intercontinental Energy Brokers (derivatives) Ltd.
- Intercontinental Exchange Ltd.
- Interdin Limited
- Intermediate Capital Group Plc
- Intermediate Capital Managers Limited
- International Asset Management Limited
- International Capital Market Association Ltd.
- International Finance Futures Snc
- International Financial Markets Trading Limited
- International Fund Marketing (uk) Limited
- International Pacific Securities Limited
- International Petroleum Exchange Limited
- International Private Equity Limited
- International Specialists (uk) Ltd
- Interregnum Venture Marketing Ltd
- Intersolve Limited
- Intesa Soditic Trade Finance Ltd
- Intl Fcstone (europe) Ltd
- Intrinsic Asset Management Ltd
- Invensys Plc
- Invesco Financial Services Limited
- Invesco Fund Managers Limited
- Invesco Global Investment Funds Limited
- Invesco Gt Asset Management Plc
- Invesco Life Ltd
- Investcorp International Ltd
- Investcorp Securities Limited
- Investec Asset Management Ltd
- Investec Asset Management Us Ltd
- Investec Fund Managers Limited
- Investec Investment Management Ltd
- Investec Investment Managers International Ltd
- Investec Management Ltd
- Investec Services Uk Limited
- Investin Securities Ltd.
- Investindustrial Advisors Limited
- Investment And Portfolio Consultants Limited
- Investment Banking Limited
- Investment Funds Direct Ltd
- Investment Manager Selection Ltd
- Investment Research Of Cambridge Limited
- Investment Services Uk Limited
- Investment Technology Group Europe Ltd
- Investment Trust Limited
- Investors Partnership Research Ltd, The
- Invik Ltd.
- Ionian Corporate Finance Limited
- Ips Capital Llp
- Ipswich Building Society
- Isc Institutional Service Center Limited
- Isis Capital Management Limited
- Isis Equity Partners Plc
- Islington Options Limited
- Ism Capital Llp
- Istituto Centrale Delle Banche Popolari Italiane
- Itv Plc
- Iv Capital Limited
- Ivaldi Capital Llp
- Iveagh Trustees Ltd, The
- Ixis Corporate And Investment Bank
- J D Farrods Securities Limited
- J M Corlett
- J O Hambro Capital Management Limited
- J O Hambro Investment Management
- J O Hambro Magan And Company Ltd.
- J P Jenkins Limited
- J P Morgan Funding Corp.
- J P Morgan Partners Europe Limited
- J P Morgan Plc
- J.P. MORGAN EUROPE LIMITED
- J.P. MORGAN EUROPE LTD. (EDINBURGH)