| Entrust Security UK Limited | Cambridge | A rating |
| EntServ UK Limited | Farnborough | A rating |
| Entuitive UK Ltd | London | A rating |
| ENVEA UK LTD | Cambridge | A rating |
| ENVELOP RISK ANALYTICS LIMITED | BRISTOL | A rating |
| Envigo RMS (UK) Limited | Bicester | A rating |
| Environmental Defense Fund UK | London | A rating |
| Environmental Resources Management Ltd | London | A rating |
| Envirowales Limited | Blaenau Gwent | A rating |
| Envisics Ltd | Milton Keynes | A rating |
| ENVISION ENERGY UK COE LTD | London | A rating |
| Envoy EMEA Limited | London | A rating |
| Enzen Global Limited | Solihull | A rating |
| EOS Electro Optical Systems Limited | Warwick | A rating |
| EPAM Systems Ltd | London | A rating |
| EPC UK GLOBAL LTD | Cheltenham | A rating |
| EPFR LTD | London | A rating |
| EPI-USE Labs Limited | Manchester | A rating |
| EPI-USE Ltd | Richmond | A rating |
| EPIC Administration Limited | LONDON | A rating |
| Epic Bristol Limited | Bristol | A rating |
| Epic Games UK ltd | Guildford | A rating |
| Epic Games UK Ltd | London | A rating |
| EPIC Private Equity LLP | London | A rating |
| Epicor Software (UK) Limited | Bracknell | A rating |
| Epicurean Dairy (UK) Limited | London | A rating |
| Epiq Systems Ltd | London | A rating |
| Epiroc UK & Ireland Limited | Hemel Hempstead | A rating |
| EPL PROPACK UK LIMITED | Reigate | A rating |
| Epoch Capital Ltd | London | A rating |
| Eppendorf UK Limited | Stevenage | A rating |
| Eppix eSolution Limited | London | A rating |
| Epsilon International UK Limited | London | A rating |
| Epsilon Telecommunications Ltd | London | A rating |
| Epson Europe BV | Watford | A rating |
| Epson Telford Limited | Telford | A rating |
| Eptura International Limited | London | A rating |
| eQ Technologic (UK) Limited | SOLIHULL | A rating |
| EQT Partners Limited | London | A rating |
| EQTF Branch UK | London | A rating |
| Equal Experts UK Limited | London | A rating |
| Equal Experts UK Ltd | London | A rating |
| Equifax Limited | Leeds | A rating |
| EquiLend Europe Limited | London | A rating |
| Equiniti Limited | Lancing | A rating |
| Equinix Services Limited | London | A rating |
| Equinor UK Limited | London | A rating |
| Equinox Fitness Holdings UK Limited | London | A rating |
| Equip Outdoor Technologies UK Limited | Alfreton | A rating |
| Equisoft Limited | Bath | A rating |
| Equitack Ltd t/a Voltaire Design | London | A rating |
| EQUUS SOFTWARE UK LIMITED | London | A rating |
| Erbay UK LTD | London | A rating |
| Erbe Medical UK Limited | Leeds | A rating |
| ERCAS B.V. | London | A rating |
| ERG (Air Pollution Control) Ltd | Horsham | A rating |
| ERG UK Holding Ltd | Edinburgh | A rating |
| Ergea UK and Ireland Limited | Reading | A rating |
| Ergonia Associates UK Ltd | London | A rating |
| Ericsson Limited | Reading | A rating |
| Ernst & Young | London | A rating |
| ES-KO (UK) Limited | Wimbledon | A rating |
| Escape Freaks Limited | London | A rating |
| ESCATEC Mechatronics Ltd | Lutterworth | A rating |
| Esco GB Limited | BARNSLEY | A rating |
| Esdevium Games Limited | Bordon | A rating |
| Esferize UK Limited | London | A rating |
| ESG Book | London | A rating |
| ESG Global (Energy) Ltd | Chorley | A rating |
| ESI UK Ltd | Cannock | A rating |
| ESL FACEIT Group Limited | London | A rating |
| ESM GLOBAL LTD | PAPWORTH | A rating |
| Esmil Process Systems Limited | High Wycombe | A rating |
| ESP Global Services Limited | Reading | A rating |
| Espersen UK Limited | Grimsby | A rating |
| Espex Batteries Limited | Barry | A rating |
| Espire Infolabs Limited | London | A rating |
| ESRI Global Inc. | Edinburgh | A rating |
| Essar Oil (UK) Ltd t/a EET Fuels | Ellesmere Port | A rating |
| Esseco UK Ltd | Wakefield | A rating |
| Essendi UK Hotels 1 Limited | London | A rating |
| Essensys (UK) Limited T/A essensys | LONDON | A rating |
| Essentra plc | Milton Keynes | A rating |
| Essilor Limited | Thornbury | A rating |
| Essity UK Ltd | Dunstable | A rating |
| ESSO Petroleum Company Ltd | Leatherhead | A rating |
| Estee Lauder Cosmetics Limited | London | A rating |
| Estrid Studios UK Ltd | London | A rating |
| eSubstance Limited t/a INK | London | A rating |
| ESV International Ltd | London | A rating |
| ESVAGT UK Limited | Aberdeen | A rating |
| ESWIN UK Limited | Whiteley | A rating |
| ETAS Limited | Fulford, York | A rating |
| Eternal Lives OpCo Ltd | London | A rating |
| Eternis Fine Chemicals UK Limited | Leek | A rating |
| Etex Building Performance Limited | Bristol | A rating |
| Ethiopian Airlines Group | London | A rating |
| EthosEnergy GBR Ltd | Aberdeen | A rating |
| Ethypharm UK Ltd | Wooburn Green | A rating |
| ETI HITIT UK LTD | London | A rating |
| Etihad Airways | London | A rating |
| Etisalat Europe Limited | London | A rating |
| eToro (UK) Limited | London | A rating |
| ETRM SERVICES (UK) LIMITED | Whittlesford | A rating |
| ETS International UK Limited | London | A rating |
| Etsy UK Ltd | London | A rating |
| Eu Matic a Division of Multimatic Limited | Coventry | A rating |
| Eui Limited | Cardiff | A rating |
| Euler Hermes Services (UK) Limited | London | A rating |
| euNetworks Fiber UK Limited | London | A rating |
| Eurac Poole Ltd | Poole | A rating |
| Eurasia Group UK, Limited | London | A rating |
| Eurazeo UK Limited | London | A rating |
| Eurex Frankfurt AG - London Branch | London | A rating |
| Euro Pool System UK Ltd | Studley | A rating |
| Eurobank Private Bank Luxembourg S.A London Branch | London | A rating |
| Euroclad Group Limited | Cardiff | A rating |
| Euroclear SA/NV UK Branch | London | A rating |
| EuroConsult International Mergers & Acquisitions Ltd | London | A rating |
| Euroeyes London Knightsbridge Limited | London | A rating |
| Eurofins Food Testing UK Limited | Wolverhampton | A rating |
| Eurofins NSC UK Limited | Wolverhampton | A rating |
| Eurofins Selcia Limited | Ongar | A rating |
| EUROMONITOR INTERNATIONAL LIMITED | LONDON | A rating |
| Euronet Payment Services Limited | London | A rating |
| Euronext London Limited | London | A rating |
| Euronimba UK Limited | London | A rating |
| Europa Capital Partners LLP | London | A rating |
| Europa Crown Ltd. | Hessle | A rating |
| EUROPASTRY UK LTD | Chertsey | A rating |
| Europcar Group UK Limited | Leicester | A rating |
| EUROPE ARAB BANK PLC | London | A rating |
| European Active Projects Ltd | Gillingham | A rating |
| Eurostampa UK Ltd | Cumbernauld | A rating |
| Eurostar International Limited | London | A rating |
| Eurotech Ltd | Bishop's Stortford | A rating |
| Eurotherm Limited | Telford | A rating |
| Eurovast UK Limited | London | A rating |
| Eurus Energy UK Ltd | Newtown | A rating |
| EUSA Pharma Ltd | Hemel Hempstead | A rating |
| Eusu Logistics UK Branch | London | A rating |
| EV Offshore | Norwich | A rating |
| EV Private Equity Ltd | Aberdeen | A rating |
| EVA AIRWAYS CORPORATION - UK BRANCH | LONDON | A rating |
| Evalueserve UK Limited | Saffron Walden | A rating |
| Evari Group Limited | London | A rating |
| Eventbrite UK Limited | London | A rating |
| Everbridge Europe Limited | London | A rating |
| Evercore Group Services Limited | London | A rating |
| Everest Advisors (UK) Ltd | London | A rating |
| Everest Group Consulting Ltd | London | A rating |
| Evergreen Garden Care (UK) Ltd | Surrey | A rating |
| Evergreen Investment Advisors (UK) LLP | London | A rating |
| Evergreen Marine (UK) Limited | London | A rating |
| Everlaw UK Limited | London | A rating |
| Everllence UK Limited | Stockport | A rating |
| EVERSANA UK Limited | London | A rating |
| Eversheds Sutherland (International) LLP | Birmingham | A rating |
| EVERYMATRIX TECHNOLOGY (UK) LIMITED | London | A rating |
| Evidera Limited | Hammersmith | A rating |
| Evolution Logistics Limited | Derby | A rating |
| Evolvient Capital Limited | London | A rating |
| Evonik UK Holdings Limited | Manchester | A rating |
| Evoqua Water Technologies Ltd | Caldicot | A rating |
| Evri Limited | Leeds | A rating |
| Evron Foods Limited trading as Easibake Foods | Pontypool | A rating |
| EVS BROADCAST UK Ltd | Bracknell | A rating |
| EWI CAPITAL LIMITED | LONDON | A rating |
| EWM-UK Limited | London | A rating |
| Exactera Limited | London | A rating |
| Exactpro Systems Limited | London | A rating |
| Exasol UK Ltd | Richmond | A rating |
| Excelerate Energy Europe Ltd | London | A rating |
| Excelitas UK Ltd | Hamble | A rating |
| Excellence Logging Limited | London | A rating |
| Exclaimer Limited | Hampshire | A rating |
| Exclusive Networks Limited | Hampshire | A rating |
| Executive Channel Europe Ltd trading as ECNlive | London | A rating |
| Exedy Clutch Europe Ltd. | Runcorn | A rating |
| Exegy UK Limited | London | A rating |
| Exeltis UK Limited | High Wycombe | A rating |
| EXFO Europe Limited | Chandler's Ford | A rating |
| Exiger Limited | London | A rating |
| Exinity UK Ltd | London | A rating |
| EXL Service (UK) Limited | London | A rating |
| Exmile Solutions Limited | Oxford | A rating |
| Exodigo UK Ltd | Cheltenham | A rating |
| ExodusPoint Capital Management UK, LLP | London | A rating |
| Exor Investments Limited | London | A rating |
| EXOTEC LOGISTICS UK | London | A rating |
| Expand Research | London | A rating |
| Expedia.com Ltd | London | A rating |
| Expeditors International UK LTD | Bedfont | A rating |
| Expensify Limited | London | A rating |
| EXPERIAN LIMITED | Nottingham | A rating |
| Experimental Worldwide Limited | London | A rating |
| Experion Technologies UK Ltd | Staines-Upon-Thames, | A rating |
| EXPLEO SOLUTIONS UK LIMITED T/A 'EXPLEO' | London | A rating |
| Expleo UK Limited | Bristol | A rating |
| Expleo UK Limited | London | A rating |