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| ARBUTHNOT UNIT TRUST MANAGEMENT LIMITED | LONDON | AUTTGB21 |
| ARC ASSET MANAGEMENT LIMITED | LONDON | ARAGGB21 |
| ARC DERIVATIVES LL | LONDON | ARDRGB21 |
| ARC PARTNERS LIMITED | LONDON | ARPTGB21 |
| ARCADIA PETROLEUM LIMITED | LONDON | ARPEGB21 |
| ARCANUM ASSET MANAGEMENT LTD | LONDON | AREGGB21 |
| ARCANUM INVESTMENT MANAGEMENT LTD | LONDON | ARNMGB21 |
| ARCHITAS MULTI MANAGER LTD | LONDON | ARMMGB21 |
| ARCHSTONE CAPITAL LIMITED | LONDON | ARCPGB21 |
| ARCIS CAPITAL LIMITED | LONDON | ARCAGB21 |
| ARCUS INVESTMENT LIMITED | LONDON | ARIVGB21 |
| ARDEN PARTNERS PLC | BIRMINGHAM | ARRRGB21 |
| ARDEN PARTNERS PLC | BIRMINGHAM | ARRRGB2100A |
| ARDEN PARTNERS PLC | BIRMINGHAM | ARRRGB21CTM |
| ARDEVORA ASSET MANAGEMENT LLP | LONDON | ARDVGB2L |
| ARES MANAGEMENT LIMITED | LONDON | ARGAGB21 |
| ARETE RESEARCH LIMITED | LONDON | ARREGB21 |
| ARGENTEX LLP | LONDON | ARTXGB2L |
| ARGENTIA PENSION CONSULTANTS LIMITED | READING | ARPCGB21 |
| ARGO TRADERS LLP | LONDON | ARTPGB21 |
| ARGONAUT CAPITAL PARTNERS LLP | LONDON | ACRLGB21 |
| ARGYLE INVESTMENT ADVISORS LIMITED | CHELTENHAM | ARIAGB21 |
| ARGYLL INVESTMENT MANAGEMENT LTD | LONDON | ARIMGB21 |
| ARIAN FINANCIAL LLP | LONDON | ARFLGB21 |
| ARIEL (UK) LIMITED | WINCHESTER | ARIEGB21 |
| ARIKI INVESTMENTS LTD. | LONDON | ARINGB21 |
| ARJENT LIMITED | LONDON | ARJEGB21 |
| ARK ASSET MANAGEMENT LIMITED | BISHOP'S STORTFORD | ARANGB21 |
| ARKIOS LIMITED | LONDON | ARKIGB21 |
| ARLINGTON CAPITAL INVESTORS LIMITED | LONDON | ARCNGB21 |