| Unified Financial Limited | Edinburgh | A rating |
| Unified FX Limited | Glasgow | A rating |
| Unified Haulier Ltd | Feltham | A rating |
| Unified Home Care Limited | Cambridge | A rating |
| Unified Home Care Limited | Waterbeach | A rating |
| Unified Marketing Agency LTD | Leicester | A rating |
| Unified Retail Services Ltd | Huntingdon | A rating |
| Uniform Communications Limited | Liverpool | A rating |
| UNIFORM CONNECTION LIMITED | Blackburn | A rating |
| Uniform World LTD | Handsworth | A rating |
| Unifrax UK Limited | St. Helens | A rating |
| Unifresh Wholesale Ltd | Walworth | A rating |
| Unifrog Education Limited | London | A rating |
| Unigestion (UK) Ltd | London | A rating |
| Unigloves (UK) Limited | Gillingham | A rating |
| Unigram Media Limited | London | A rating |
| UniHive Education Limited | Cambridge | A rating |
| UNIK PROMOTERS LTD | Coventry | A rating |
| Unilabs Limited | London | A rating |
| Unilever UK Limited | Kingston-upon-Thames | A rating |
| Unilin Distribution Ltd. | Newry | A rating |
| Unilin Insulation UK Ltd. | Chesterfield | A rating |
| Unilink Sofware Limited | London | A rating |
| Unily Group Limited | Godalming | A rating |
| Unimagined Ltd | London | A rating |
| UnimaQ Ltd | Wrexham | A rating |
| UNIMASTER MARKETING & MANAGEMENT LTD | LONDON | A rating |
| UNIMETAL LTD | Wolverhampton | A rating |
| Unimetals Services Limited | London | A rating |
| UNINEED LIMITED | GLASGOW | A rating |
| Uninist Limited | Ilford | A rating |
| UNION BANCAIRE PRIVEE | LONDON | A rating |
| Union Bancaire Privee (UK) Limited | London | A rating |
| UNION BANK OF INDIA (UK) LIMITED | London | A rating |
| Union Carz Limited | Cambridgeshire | A rating |
| Union Church Sheffield | Sheffield | A rating |
| Union Direct Ltd | Edinburgh | A rating |
| Union Estates | Dagenham | A rating |
| UNION FAST FOOD LIMITED | Bedford | A rating |
| UNION FAST FOODS LIMITED | Bedford | A rating |
| Union Foundation | Bridgend | A rating |
| UNION GROCERIES LIMITED | London | A rating |
| Union Jacques Limited | London | A rating |
| Union Jax LLC | New Malden | A rating |
| UNION LOUNGE LIMITED | Glasgow | A rating |
| Union Maritime Limited | Wembley | A rating |
| UNION NEPAL SERVICES LIMITED | London | A rating |
| Union of British Messianic Synagogues | Norwich | A rating |
| Union Press Ltd | London | A rating |
| Union Stores Limited | Glasgow | A rating |
| Union Street Dental Care ltd | ABERDEEN | A rating |
| Union Supported Living Ltd | Coventry | A rating |
| Union Visual Effects Limited | London | A rating |
| Union Windows Ltd | London | A rating |
| UNIONE TRADING EUROPE LTD | NEW MALDEN | A rating |
| UnionPay International Co., Ltd UK Branch | London | A rating |
| UNIORA CIC | London | A rating |
| UNIPaaS Financial Services Ltd | London | A rating |
| UNIPAC SHIPPING (UK) LTD | Staplehurst | A rating |
| UNIPART GROUP LIMITED | COWLEY | A rating |
| Unipec Singapore Pte. Ltd | London | A rating |
| Unipec UK Company Limited | London | A rating |
| Uniper UK Ltd | Solihull | A rating |
| Uniphar Commercial (UK) Ltd | Rugby | A rating |
| UniPhi UK Limited | Reading | A rating |
| Uniphore Technologies UK Limited | London | A rating |
| UNIPRES (UK) LIMITED | Sunderland | A rating |
| Unipro Limited | Chichester | A rating |
| UNIQ FLOOR LTD | NOTTINGHAM | A rating |
| Uniq Health Ltd t/a Tuune | Sawston | A rating |
| Uniq Healthcare Limited | Datchet | A rating |
| Uniq Technology Ltd | Southanpton | A rating |
| UNIQA DENTAL LABORATORIES LTD | Wimbledon | A rating |
| UNIQLO EUROPE LTD | London | A rating |
| Uniqodo Limited | Cranleigh | A rating |
| UNIQONE LIMITED | ENFIELD | A rating |
| UNIQUE 1 COMMUNICATIONS LTD | Dagenham, Essex | A rating |
| UNIQUE 35 LTD | London | A rating |
| UNIQUE AIR EXPRESS LIMITED | feltham | A rating |
| Unique Auto Hire Ltd | London | A rating |
| UNIQUE BARBER AND BEAUTY LTD | Thornton Heath | A rating |
| Unique Barber Ltd | Edgware | A rating |
| UNIQUE BEAUTY 4 YOU LIMITED | Essex | A rating |
| Unique Beds Kimited | Horby | A rating |
| Unique Builders Ltd | Hayes | A rating |
| Unique Building Services and Consultancy (UK) LTD | Oldham | A rating |
| Unique Business Service Ltd | London | A rating |
| Unique Car Care (Bradford) Limited | Bradford | A rating |
| Unique Care Network Limited | Smethwick, | A rating |
| Unique Child day nursery ltd | Northolt | A rating |
| UNIQUE CHOICE DISTRIBUTION LIMITED | Peterborough | A rating |
| Unique Contact and Community Services Limited | London | A rating |
| Unique Digital Marketing Limited T/A syzygy | London | A rating |
| UNIQUE ENTERPRISES INTERNATIONAL TRADING LTD T/A UNIQUE CONVENIENCE STORE | MANCHESTER | A rating |
| Unique Fabrics (UK) Ltd | London | A rating |
| UNIQUE FACILITY MANAGEMENT LIMITED | Wolverhampton | A rating |
| UNIQUE FAST FOOD LTD | Reading | A rating |
| Unique Fast Fry Limited TA Fast Fry | Wallsend | A rating |
| Unique Gelato Ltd T/A Sundaes Gelato | Harrow, London | A rating |
| UNIQUE GLAZING LONDON LTD | Uxbridge | A rating |
| Unique Gravity | Chesterfield | A rating |
| Unique Halal Meat | Birmingham | A rating |
| UNIQUE HAULAGE LTD | Gravesend | A rating |
| Unique Help Ltd | Orpington | B rating |
| Unique Home (London) Ltd | London | A rating |
| Unique IT Consultancy Ltd | New Basford | A rating |
| UNIQUE IT SUPPORT LIMITED | Harpenden | A rating |
| Unique Kitchen and Bedroom Ltd | Hayes | A rating |
| Unique Marble Ltd | London | A rating |
| Unique Mobiles Tech Services Ltd | Wolverhampton | A rating |
| UNIQUE MOT LIMITED | London | A rating |
| UNIQUE NR FASHION LIMITED | London | A rating |
| UNIQUE OPTIONS + LIMITED | Sheffield | A rating |
| Unique Personnel (UK) Limited | London | A rating |
| Unique Plating & Polishing Ltd | Birmingham | A rating |
| UNIQUE PORTSMOUTH LTD | Hayling Island | A rating |
| Unique Price | Sheerness | A rating |
| UNIQUE PROFESSIONALS GROUP LTD | Norwich | A rating |
| UNIQUE PROPERTY GROUP LTD | Waterlooville | A rating |
| Unique Quality Care Lltd | Cuffley | A rating |
| Unique Retail Services Ltd | Leicester | A rating |
| UNIQUE SIXTH FORM | EDMONTON | A rating |
| Unique Statement Limited T/A Soot and Ty | London | A rating |
| Unique Stone Surfaces Limited | Enfield | A rating |
| Unique Support Solutions Limited | Leeds | A rating |
| UNIQUE SUSHI LIMITED T/A LETS SUSHI | SHEFFIELD | A rating |
| Unique System (UK) Ltd | Aberdeen | A rating |
| Unique Therapy Studio LTD | Hinckley | A rating |
| UNIQUE Trader and RetailersLTD | Northampton | A rating |
| UNIQUE TRADING CORPORATION LTD | London | A rating |
| Unique Traid Limited T/a Kaydees | Walsall | A rating |
| UNIQUE UK BEAUTY LTD | Smethwick | A rating |
| Unique Vacations (U.K.) Limited | London | A rating |
| Unique Ventures Ltd T/A Veeve | London | A rating |
| Unique Window Systems Limited | Leicester | A rating |
| UNIQUE WOMAN LTD | MANCHESTER | A rating |
| Unique2 Ltd | Uxbridge | A rating |
| UNIQUEX UK LIMITED | Manchester | A rating |
| UNIQUM SERVICES LONDON LIMITED | London | A rating |
| UNIS Group Ltd | Northampton | A rating |
| Unisea Maritime Limited | London | A rating |
| UNISEAS LIMITED | Brentford | A rating |
| Uniserve Holdings Limited | Upminster | A rating |
| Unisex Cruz Stylists Limited | Leicester | A rating |
| Uniskin LTD | Belper | A rating |
| Unisnacks Europe Limited | Biggleswade | A rating |
| Unison Investments Limited | Reading | A rating |
| UNISON SOFTWARE AND CONSULTANCY LTD | London | A rating |
| Unison Triumph Investments Ltd T/A Hotel Riviera | Sidmouth | A rating |
| Unispace Global Limited | London | A rating |
| Unistar Wholesale Ltd | London | A rating |
| UNISTONE VENTURES LIMITED T/A HEALTHFIELD HOUSE | UXBRIDGE | A rating |
| Unistrut Limited | West Bromwich | A rating |
| Unisure Limited | London | A rating |
| Unisus | Wallsend | A rating |
| Unisys Limited | MILTON KEYNES | A rating |
| UNIT 9 (UK) Limited | London | A rating |
| Unit C1, Falcon Business Centre | Oldham | A rating |
| UNIT Film & TV Limited | London | A rating |
| Unit London Ltd | London | A rating |
| Unit Superheater Engineering Ltd | Swansea | A rating |
| UNIT TECHNOLOGY LIMITED | LONDON | UK Expansion Worker: Provisional |
| UNIT TV Ltd | London | A rating |
| Unit4 Business Software Ltd | Harrogate | A rating |
| Unitary Ltd | St Albans | A rating |
| Unite | Birmingham | A rating |
| UNITE CARE GROUP LTD | Cardiff, | A rating |
| UNITE CITIES LOGISTIC AND STORAGE LTD | PRESTON | A rating |
| Unite Deliveries Ltd | Northamptonshire | A rating |
| Unite Healthcare Ltd | St Helens | A rating |
| Unite Highland Care | Dartford | A rating |
| Unite Procurement UK Limited | Cardiff | A rating |
| Unite the Union | London | A rating |
| UNITEC SOLUTIONS LONDON LTD | Ilford | A rating |
| UNITECH COMMUNICATIONS LTD | ILFORD | A rating |
| Unitech Consultancy Services Pvt Ltd | Edinburgh | A rating |
| Unitech Engineering Ltd | Burntwood | A rating |
| United (Travel & Finance) Ltd t/a United Travel | Birmingham | A rating |
| United Airlines Inc | Hounslow | A rating |
| United Apostolic Church of Christ Citadel of Praise | Manchester | A rating |
| UNITED APPLIANCES LTD | Rochdale | A rating |
| United Autosports | Wakefield | A rating |
| United Bank for Africa (UK) Limited | LONDON | A rating |
| United Bible Societies Association | Swindon | A rating |
| United Brands Ltd | East Kilbride | A rating |
| UNITED BROS LIMITED | READING | A rating |
| UNITED BROTHERS GLOBAL LTD | London | A rating |
| UNITED BROTHERS LTD | London, England | A rating |
| United Business Xpress Limited | Colnbrook | A rating |
| United By 2022 Charity | Birmingham | A rating |
| United Care Limited | Birmingham | A rating |
| United Care Solutions | Cearphilly | A rating |
| United Carpets Group Limited | Bramley | A rating |
| United Cast Bar (UK) Ltd | Chesterfield | A rating |
| UNITED CATER LIMITED | Greenford | A rating |
| United Children Limited | Stoke-On-Trent | A rating |
| United Christian Broadcasters Ltd | Stoke on Trent | A rating |
| United Church Schools Trust | Peterborough | A rating |
| United Colleges Group | London | A rating |
| United Commodities Ltd | Oldham | A rating |