| Telling Trade UK Limited | Manchester | A rating |
| Telstra Health UK Limited | London | A rating |
| Telstra UK Limited | London | A rating |
| TELUS HEALTH (UK) LTD | London | A rating |
| Temasek International (Europe) Limited | London | A rating |
| Temenos UK Ltd | London | A rating |
| Temile Development Company Ltd | Ovington | A rating |
| Temis Luxury UK Limited | Chessington | A rating |
| Temple Lifts Limited | Bromley | A rating |
| Temple Translations Ltd | London | A rating |
| Tempo International Limited | St Albans | A rating |
| Tempur Sealy International Ltd. | Uxbridge | A rating |
| Ten Lifestyle Management ( Ten Group) | London | A rating |
| Tenarai Solutions Limited | London | A rating |
| Tenaris Global Services UK Limited | Aberdeen | A rating |
| Tenaron Capital Management UK LLP | London | A rating |
| Teneo Strategy Limited | London | A rating |
| Tenerity Limited | London | A rating |
| TenFifty Capital Management Limited | London | A rating |
| TENGFEI INTERNATIONAL LTD | London | A rating |
| Tenneco-Walker (UK) Ltd | Tredegar | A rating |
| Tenneco-Walker (UK) Ltd | Dowlais Top | A rating |
| Tenon FM Limited | Uxbridge | A rating |
| Tensar International Limited | Blackburn | A rating |
| Tensys Ltd | Bath | A rating |
| Tenthpin Management Consultants Limited | London | A rating |
| TEPCO POWER GRID UK LIMITED | London | A rating |
| Teradata (UK) limited | London | A rating |
| Teraflow Ltd | Esher | A rating |
| Terasaki Electric (Europe) Limited | Glasgow | A rating |
| Terex GB Limited | County Tyrone | A rating |
| Tern PLC | London | A rating |
| Terra Firma Capital Partners | London | A rating |
| Terumo BCT Ltd | Larne | A rating |
| TES Global Limited | Sheffield | A rating |
| TES-AMM UK Ltd | Cannock | A rating |
| Tesco Personal Finance plc | Edinburgh | A rating |
| Tesco Stores Limited | Welwyn Garden City | A rating |
| Tesla Motors Ltd | Manchester | A rating |
| Tessaract Technologies UK Limited | Farnham | A rating |
| Tessian Limited | LONDON | A rating |
| Tessitura Network UK Ltd | Worcester | A rating |
| Tessolve Semiconductor Ltd | Bristol | A rating |
| Testhouse Limited | London | A rating |
| TestingXperts Limited | Uxbridge | A rating |
| TESTQ TECHNOLOGIES LIMITED | LEICESTER | A rating |
| Tetra Pak Ltd | Paddington | A rating |
| Tetra Pak Processing UK Ltd | Paddington | A rating |
| Tetra Tech international Development Limited | London | A rating |
| TETRA Technologies (UK) Limited | Aberdeen | A rating |
| Teva UK Ltd | Harlow | A rating |
| Texas Instruments Limited | Manchester | A rating |
| Texon Non Woven Ltd | Skelton | A rating |
| Textron Limited | London | A rating |
| Texuna Technologies Limited | Isleworth | A rating |
| Teya Services Ltd. | London | A rating |
| TFG Asset Management UK Limited | LONDON | A rating |
| TFP Fertility Holding Ltd | Oxford | A rating |
| TG Group Management Services UK Ltd | London | A rating |
| TGA Industries Limited | Brighton | A rating |
| TGE Gas Engineering GmbH | Manchester | A rating |
| TGS GEOPHYSICAL COMPANY (UK) LIMITED | Woking | A rating |
| TGT Oilfield Services UK Limited | Aberdeen | A rating |
| TGT Oilfield Services UK Ltd | Aberdeen | A rating |
| TGW LTD | MARKET HARBOROUGH | A rating |
| TH UK & Ireland Limited | Egham | A rating |
| THAI AIRWAYS INTERNATIONAL | LONDON | A rating |
| Thales UK Limited | Reading | A rating |
| THALIA WASTE MANAGEMENT LIMITED | London | A rating |
| Thames & Hudson Ltd | London | A rating |
| Thames City Property Development Ltd | London | A rating |
| Thames Technology | Bracknell | A rating |
| Thatsup Ltd | London | A rating |
| The Access Bank UK Ltd | London | A rating |
| The Active Network (EU) Limited | London | A rating |
| The Akshaya Patra Foundation UK | Watford | A rating |
| The Albion Knitting Company Limited | London | A rating |
| The Alexander Group, Inc. | London | A rating |
| The Appointment Group (UK) Ltd | London | A rating |
| The Associated Press | London | A rating |
| The Association of Chartered Certified Accountants | Glasgow | A rating |
| The Automation Partnership (Cambridge) Ltd | Royston | A rating |
| The Bank of Korea | London | A rating |
| The Bank of Nova Scotia | London | A rating |
| The Billy Graham Evangelistic Association | Coventry | A rating |
| The Binding Site Group Limited | Birmingham | A rating |
| The BMS Group | London | A rating |
| The Boots Group Services Limited | Weybridge | A rating |
| The Boston Consulting Group UK LLP | London | A rating |
| THE BRANDTECH GROUP LIMITED | London | A rating |
| The Brattle Group Limited | London | A rating |
| The Buchan Group London Pty Limited | London | A rating |
| The Cambridge Satchel Company Limited | Cambridge | A rating |
| The Capital Markets Company (UK) Limited | London | A rating |
| The Carlton Tower Limited | London | A rating |
| The Center for Countering Digital Hate | London | A rating |
| The Chiba Bank, Ltd | London | A rating |
| THE CHILDREN'S INVESTMENT FUND FOUNDATION (UK) | LONDON | A rating |
| The Church of Jesus Christ of Latter-day Saints (Great Britain) | High Wycombe | A rating |
| The City & Guilds of London Institute | London | A rating |
| The Client Relationship Consultancy Limited | London | A rating |
| The Collinson Group Limited | London | A rating |
| The Colt Car Company Ltd | Cirencester | A rating |
| The Conde Nast Publications Limited | London | A rating |
| The Considered Communications Ltd. | London | A rating |
| THE CONTINUITY COMPANY LIMITED | Middlesex | A rating |
| The Creative StoreEurope Limited | London | A rating |
| The Currency Cloud Services Limited | London | A rating |
| The Doctors Laboratory | London | A rating |
| THE DORCHESTER GROUP LIMITED | LONDON | A rating |
| The Duke of Edinburgh's International Award Foundation | London | A rating |
| The Economist Newspaper Limited | London | A rating |
| The Edrington Group | Glasgow | A rating |
| The F.A. Bartlett Tree Expert Company Limited | St Albans | A rating |
| The Felixstowe Dock & Railway Company trading as Port of Felixstowe | Felixstowe | A rating |
| The Financial Times Ltd | London | A rating |
| The Fred Hollows Foundation (UK) | London | A rating |
| The Friedkin Group International Ltd | London | A rating |
| The Gallup Organisation Limited | London | A rating |
| The Gap Partnership | Berkhamsted | A rating |
| The Glenmorangie Company Limited | Edinburgh | A rating |
| The Global Draw Ltd | Manchester | A rating |
| The Go Ahead Group Limited | London | A rating |
| THE HACKETT GROUP LIMITED | London | A rating |
| The HALO Trust | Thornhill | A rating |
| The Hospitality Group UK Ltd | London | A rating |
| The Hotwire Public Relations Group Limited | London | A rating |
| The IFRS Foundation | London | A rating |
| The Imagination Group Limited | London | A rating |
| The Institute of Physics | London | A rating |
| The International Institute for Strategic Studies | London | A rating |
| The Japan Association of Marine Safety (London Office) | London | A rating |
| The Japan Racing Association | London | A rating |
| The Japan Ship Owners' Mutual Protection and Indemnity Association | London | A rating |
| The Japanese School Limited | London | A rating |
| The Japanese Shipowners' Association(Office for Europe) | London | A rating |
| THE JIJI PRESS LIMITED | London | A rating |
| The Jordans Ryvita Company a division of ABF Grain Products Ltd | Biggleswade | A rating |
| The Juice Plus+ Company Limited | London | A rating |
| The Kantar Group Limited | London | A rating |
| The Korea Development Bank London Branch | London | A rating |
| The L.S. Starrett Company | Jedburgh | A rating |
| The Lede Company London Ltd | London | A rating |
| THE LONDON METAL EXCHANGE | LONDON | A rating |
| THE LONDON MINT OFFICE LIMITED | Tonypandy | A rating |
| The Malala Fund UK | London | A rating |
| The Mandy Network | High Wycombe | A rating |
| The Marketing Practice UK Ltd | London | A rating |
| The Marketing Store Worldwide (Europe) Limited | London | A rating |
| The Mathworks Limited | Cambridge | A rating |
| The Medical Protection Society Limited | Leeds | A rating |
| The Mentholatum Company Limited | East Kilbride | A rating |
| The Mission Group plc | Filleigh | A rating |
| The Nature Conservancy | London | A rating |
| The Nature's Bounty Co. Ltd | Tring | A rating |
| The New India Assurance Company Ltd. | London | A rating |
| The Nexus Club London Limited | London | A rating |
| The Norinchukin Bank | London | A rating |
| The Norton Motorcycle Co. Limited | London | A rating |
| The Old Bushmills Distillery Company Limited | Bushmills | A rating |
| The Old Station Nursery Ltd | Faringdon | A rating |
| The Organic Pharmacy Limited | London | A rating |
| The Original London Sightseeing Tour Limited | London | A rating |
| The Oval Partnership Architecture Ltd | London | A rating |
| The People's Bank of China Representative Office for Europe | London | A rating |
| The Pilot Pen Company (UK) Ltd | Bourne End | A rating |
| THE POND LONDON LTD (UK) | London | A rating |
| The Private Infrastructure Development Group Ltd | London | A rating |
| The Renaissance Club at Archerfield LLP | North Berwick | A rating |
| The Representative Office of Shanghai Clearing House in London | London | A rating |
| The Risk Advisory Group Plc | London | A rating |
| The Royal Society of Chemistry | Cambridge | A rating |
| The Rug Company Limited | London | A rating |
| The Run Buddy Limited | London | A rating |
| The Sage Group plc | Newcastle upon Tyne | A rating |
| The Seaport Group Europe LLP | London | A rating |
| The Shipping Corporation of India Ltd | LONDON | A rating |
| The Siemon Company Limited | Woking | A rating |
| The Smart Cube Limited | London | A rating |
| The SR Group (UK) Limited | London | A rating |
| The Stepstone Group UK Ltd | London | A rating |
| The Swedish Club | London | A rating |
| The Testing Consultancy Europe Limited | London | A rating |
| The Third Floor London Limited | London | A rating |
| The Toronto Dominion Bank | London | A rating |
| The Travel Company Limited | London | A rating |
| The Travel Team | Leicester | A rating |
| The UK Trade Desk Ltd | London | A rating |
| The Unstuffy Hotel Co Ltd | Bowness-on-Windermere | A rating |
| The Virtual Forge Limited | Trowbridge | A rating |
| The Walt Disney Company Ltd | London | A rating |
| The Way International UK Limited | London | A rating |
| The Whitehouse Post Productions Limited | London | A rating |
| The Wolseley Hospitality Group Limited | London | A rating |
| The Yomiuri Shimbun | London | A rating |
| THE.TEAM: SME MANAGEMENT EMEA LIMITED | London | A rating |
| Thea Pharmaceuticals Limited | Keele | A rating |
| TheMathCompany Private Limited | Witney | A rating |
| Theodo Ltd | London | A rating |
| Theorem EMEA Pvt Limited | London | A rating |