| Unit4 Business Software Ltd | Harrogate | A rating |
| United Airlines Inc | Hounslow | A rating |
| United Bank for Africa (UK) Limited | LONDON | A rating |
| United Christian Broadcasters Ltd | Stoke on Trent | A rating |
| United Insurance Brokers Limited | London | A rating |
| United Mining Services Ltd | London | A rating |
| United Overseas Bank Ltd | London | A rating |
| UNITED PETFOOD UK LIMITED | Llangadog | A rating |
| United Retail & Sourcing Limited | London | A rating |
| United Shield International Limited | Hampshire | A rating |
| United Talent Agency UK Operations Ltd T/A United Talent Agency | London | A rating |
| United Tyre Company Limited | Newport | A rating |
| United Utilities PLC | Warrington | A rating |
| UNITEDLEX LIMITED | LONDON | A rating |
| Unity Software Limited | Brighton | A rating |
| Universal Components UK Limited | Barnsley | A rating |
| Universal Design Studio Limited | London | A rating |
| Universal Music Operations Ltd | London | A rating |
| University of California Trust | London | A rating |
| University of Chicago Booth School of Business | London | A rating |
| University of Notre Dame | London | A rating |
| University of Reading | Reading | A rating |
| UNLIMINT EU LTD | London | A rating |
| Unlu Securities UK Limited | London | A rating |
| Unosquare Limited | Belfast | A rating |
| Unox UK Ltd | Camberley | A rating |
| Unum Limited | Dorking | A rating |
| Unumplus Limited | London | A rating |
| Unybrands Operations Ltd | Hemel Hempstead | A rating |
| UOMA Beauty | London | A rating |
| UPB AS Ltd | London | A rating |
| UPL Europe Limited | Sandbach | A rating |
| UPM Kymmene UK Ltd | Irvine | A rating |
| Uppercut Deluxe Co Ltd. | Eastleigh | A rating |
| UPS Ltd | Middlesex | A rating |
| Uptime Professional Services Limited | London | A rating |
| UPVEST SECURITIES LTD | London | A rating |
| Urbacon Trading & Contracting UK Ltd | London | A rating |
| Urban Airship UK Limited | London | A rating |
| Urban Partners Management UK Limited | London | A rating |
| Urban Science International Ltd. | Reading | A rating |
| Urbaser Ltd. | Cheltenham | A rating |
| URBN UK LTD (Divisional brands Urban Outfitters and Anthropologie) | London | A rating |
| URENCO LIMITED | London | A rating |
| Uria Menendez Abogados S.L.P. | London | A rating |
| USAA International Services SARL London Branch | London | A rating |
| UserTesting | Edinburgh | A rating |
| USERTESTING TECHNOLOGIES LIMITED. | London | A rating |
| Usha Martin UK LIMITED | Nottinghamshire | A rating |
| USM U. SCHAERER SONS LIMITED | London | A rating |
| USN UK Ltd | Longbridge | A rating |
| UST (GLOBAL) PRIVATE LIMITED | London | A rating |
| UST Healthproof Holdings (UK) Private Ltd | LONDON | A rating |
| USTWO LIMITED | London | A rating |
| Utex Europe Limited | Ashington | A rating |
| Uzbekistan Airways | London | A rating |
| V.Ships PLC | London | A rating |
| V.Ships UK Ltd | Glasgow | A rating |
| Vaillant Group UK Ltd | Belper | A rating |
| Vaisala Ltd | Birmingham | A rating |
| Valcon Group UK Limited | Kent | A rating |
| Vald Operations Limited | Leaminghton Spa | A rating |
| Vale Base Metals Limited | London | A rating |
| Vale Europe Ltd | Clydach | A rating |
| VALE Insurance Intermediary Europe GmbH | London | A rating |
| VALE INSURANCE PARTNERS EUROPE B.V. | London | A rating |
| VALENTINO ENGLAND LIMITED | LONDON | A rating |
| Valeo UK Limited | Redditch | A rating |
| Valero Operations Support Limited | London | A rating |
| Vallourec Oil & Gas UK Ltd | Bellshill | A rating |
| Valmet Ltd | Rossendale | A rating |
| Valmiera Glass UK Limited | Sherborne | A rating |
| Valnet UK Ltd | Manchester | A rating |
| Valona Intelligence Limited | Reading | A rating |
| Valori Asset Management UK | London | A rating |
| Valterra Platinum Marketing Limited | London | A rating |
| Value Retail Plc | London | A rating |
| ValueLabs (UK) Ltd | Harrow | A rating |
| ValueMomentum Ltd | London | A rating |
| Vamstar Limited | London | A rating |
| Van den Herik UK Limited | Warwick | A rating |
| Van Doorne UK B.V. | London | A rating |
| Van Oord | Henfield | A rating |
| Vandemooretele Europe NV UK Branch | Staines-Upon-Thames | A rating |
| Vanderlande Industries United Kingdom Limited | Solihull | A rating |
| Vanguard Healthcare Solutions Ltd | Gloucester | A rating |
| Vanguard Investments UK Ltd | London | A rating |
| Vanguard Logistics Services Limited | Maldon | A rating |
| Vaniam Group Global Ltd | London | A rating |
| Vanity Group UK Limited | London | A rating |
| Vanta Technology UK Limited | London | A rating |
| Vantage Data Centers UK Limited | Newbury | A rating |
| Vantage Infrastructure (UK) Limited | London | A rating |
| Vantage Power Limited | London | A rating |
| Vantage RE Ltd | London | A rating |
| Vantor Technologies UK Ltd | London | A rating |
| Varde Partners Europe Limited | London | A rating |
| Vargronn Service Co Limited | London | A rating |
| Varian Medical Systems UK Limited | Crawley | A rating |
| Varicent UK OpCo Limited | Woking | A rating |
| Varonis (UK) Limited | London | A rating |
| Vascutek Limited | Inchinnan | A rating |
| Vatech Dental Manufacturing Ltd | New Malden | A rating |
| Vattenfall Wind Power Ltd | London | A rating |
| Vauban Technologies Limited | London | A rating |
| Vault Platform Ltd | London | A rating |
| Vauxhall Motors Limited | Coventry | A rating |
| VAYNERMEDIA LIMITED | London | A rating |
| VBT Software UK Limited | Harrow | A rating |
| VCP Advisors Limited | London | A rating |
| VDA UK Ltd | Watford | A rating |
| VE3 Global Ltd | London | A rating |
| Vea Telecoms UK Limited | Bracknell | A rating |
| Vecom Sillavan Metal Treatment Limited | Bury | A rating |
| Vectone Mobile Holding Limited | LONDON | A rating |
| VECTOR AEROSPACE | GOSPORT | A rating |
| Vectra Limited | Richmond | A rating |
| VECTURA GROUP PLC | Chippenham | A rating |
| Vectura Limited | Chippenham | A rating |
| Vedanta Resources Limited | London | A rating |
| Vedder Price LLP | London | A rating |
| Veeam Software UK Limited | London | A rating |
| Veetee Rice Ltd | Rochester | A rating |
| Veeva Systems UK Ltd | London | A rating |
| VEGA INDUSTRIES LTD | HARROW | A rating |
| Vegware Ltd | Edinburgh | A rating |
| Velo Payments Limited | London | A rating |
| Velocity Global International Services Ltd | London | A rating |
| VELUX Company Ltd | Fife | A rating |
| Vena Solutions UK Ltd | London | A rating |
| Vendavo UK Limited | London | A rating |
| Venterra Group Limited | London | A rating |
| Vention Solutions Ltd. | Kingston Upon Thames | A rating |
| VENTO ENERGY SUPPORT LTD | LONDON | A rating |
| Venus by Maria Tash Limited | London | A rating |
| Veolia ES (UK) Ltd | Cannock | A rating |
| VEOLIA WATER TECHNOLOGIES & SOLUTIONS (UK) LIMITED PARTNERSHIP | Peterborough | A rating |
| VEON Digital Limited | London | A rating |
| VERA GLOBAL SOLUTIONS LTD | London | A rating |
| Veracode Ltd | London | A rating |
| VERALLIA UK LTD | LEEDS | A rating |
| Veramed Limited | Twickenham | A rating |
| Veranex UK Limited | London | A rating |
| Verasonics Ltd | Bristol | A rating |
| Vercity Social Infrastructure (UK) Limited | LONDON | A rating |
| Verdantix Limited | London | A rating |
| Veremark Ltd | London | A rating |
| Veridium UK Limited | Oxford | A rating |
| Verifone (UK) LIMITED | London | A rating |
| Verint Systems UK Limited | Woking | A rating |
| Veripos Ltd | Aberdeen | A rating |
| Verisae, Inc. | London | A rating |
| Verisk Analytics Limited | London | A rating |
| Veristat International Limited | London | A rating |
| Verisure Services UK Ltd | London | A rating |
| Verita Global Ltd | London | A rating |
| Verition Advisors (UK) Limited | London | A rating |
| Verity Medical Limited | Romsey | A rating |
| Verizon UK Limited | Reading | A rating |
| Verkada Limited | London | A rating |
| Vermeg Management Limited | London | A rating |
| Vernacare International Limited | Buckshaw Village | A rating |
| Versace UK Limited | London | A rating |
| Versalis UK Ltd | Grangemouth | A rating |
| Version 1 Solutions Limited | Birmingham | A rating |
| Versuni UK Limited | Woking | A rating |
| Vertex Pharmaceuticals (Europe) Ltd | London | A rating |
| Vertical Aerospace Group Ltd | Bristol | A rating |
| Vertice Technology Ltd | London | A rating |
| Vertiv Company Group Limited | Bedford | A rating |
| Verto Education UK Ltd | London | A rating |
| Verve the Live Agency Limited | London | A rating |
| Verwater Tank & Industrial Services Ltd | Brough | A rating |
| Veson Nautical Limited | London | A rating |
| Vestas Offshore Wind Ltd | Warrington | A rating |
| Vestas Technology UK Limited | Newport | A rating |
| Vestel Holland B.V. UK Branch Office | Langley | A rating |
| Vestiaire Collective UK Limited | London | A rating |
| Vesuvius UK Limited | Chesterfield | A rating |
| VEVO (UK) LIMITED | London | A rating |
| VF Services (UK) Ltd. | London | A rating |
| VF UK SERVICES LTD | Nottingham | A rating |
| VFS Financial Services Limited | Warwick | A rating |
| VGP Developments UK Ltd | Bristol | A rating |
| Via Transportation UK Ltd. | London | A rating |
| Viabizzuno Ltd | London | A rating |
| ViaCon (United Kingdom) Limited | St. Helens | A rating |
| Vialto Partners | London | A rating |
| Viaplay Group UK Limited | London | A rating |
| Viasat UK Limited | Farnborough | A rating |
| VIAVI Solutions UK Limited | Stevenage | A rating |
| Viber UK Limited | London | A rating |
| VICA Power Limited | Birmingham | A rating |
| Vice UK Limited | London | A rating |
| Vicente & Partners Ltd | London | A rating |
| VICTAULIC EUROPE | Stevenage | A rating |
| Victor Buyck Steel Construction UK Ltd | Margam | A rating |
| Victor Products Limited | South Shields | A rating |
| Victoria & Albert Baths Limited | Wolverhampton | A rating |
| Victoria Mutual Finance Limited | London | A rating |