| RV Pharma Ltd | Wellingborough | A rating |
| RV PVT Limited T/A Cake Box | Wokingham | A rating |
| RV Services Limited | London | A rating |
| RVA PROPERTY SERVICES LIMITED | Chesham | A rating |
| RVB Transcendence Limited | Worthing | A rating |
| RVJ Healthcare Ltd | Bicester | A rating |
| RVL Aviation Limited | Castle Donington | A rating |
| Rvm foods Ltd | Dronfield | A rating |
| RVR Convenience Store | Rochford | A rating |
| RVS DEV UK LTD | London | A rating |
| RVSS Company Ltd. T/A COSTCUTTER | WINDSOR | A rating |
| RVT Architects | Purley | A rating |
| RVT Parametrix Ltd | Birmingham | A rating |
| Rvvup Ltd. | London | A rating |
| RW Beauty Europe Ltd | London | A rating |
| RW BEAUTY VENTURES LIMITED | DAGENHAM | A rating |
| RW Equine Vet Ltd | RYE | A rating |
| RW Stokes & Son Ltd | Lincoln | A rating |
| RWA Consulting Engineers UK Ltd | Aylesbury | A rating |
| Rwanda High Commission | London | A rating |
| RWBCA Limited | Nottingham | A rating |
| RWC Partners Limited | London | A rating |
| RWDI Anemos Limited | Milton Keynes | A rating |
| RWE Generation UK Plc | Swindon | A rating |
| RWE Renewables Management UK Limited | Wiltshire | A rating |
| RWE Supply & Trading GmbH | Swindon | A rating |
| RWG (Repair & Overhauls) Limited | Aberdeen | A rating |
| RWG Healthcare Ltd | Aberdeen | A rating |
| RWI FILMS LIMITED | Bagshot | A rating |
| RWM Autos Limited | Iver | A rating |
| RWORLD EXPRESS UK LTD | WEMBLEY | A rating |
| RWS Global UK Limited | Wolverton Mill | A rating |
| RWS TRANSLATIONS LIMITED | Maidenhead | A rating |
| Rx Medication Ltd t/a Stamford Pharmacy | Lincolnshire | A rating |
| Rxcelerate Limited | Cambridge | A rating |
| Rxlive Limited | Wallington | A rating |
| RXLOGIX CORPORATION LIMITED | ESSEX | A rating |
| RXN CONSTRUCTION LTD | ROMFORD | A rating |
| Rxpharmaco Ltd | Crawley | A rating |
| RY SOLUTIONS LTD | Slough | A rating |
| Ryan Foods Limited Trading as Mazaa | Hayes | A rating |
| RYAN INFOTECH LIMITED | Camberley | A rating |
| RYAN PROJECTS LIMITED | West Bromwich | A rating |
| Ryan Solutions & Management Services Ltd | Rugby | A rating |
| Ryan Specialty Corporate Services Limited | London | A rating |
| Ryan Specialty International Limited | London | A rating |
| Ryan Tax Services UK Limited | London | A rating |
| Ryanair Limited | Stansted | A rating |
| RYANM TBT LTD T/A Pepe's West Brom | West Bromwich | A rating |
| Rybit Limited | London | A rating |
| Rybrook Motors trading as Porsche Centre Chester | Cheshire Oaks | A rating |
| RYCROFT SOLUTIONS LIMITED | Bradford | A rating |
| Rydal Penrhos | Colwyn Bay | A rating |
| Ryde House Homes Ltd | Ryde | A rating |
| Ryde School with Upper Chine | Ryde | A rating |
| Ryde Visionplus Limited t/a Specsavers | Ryde | A rating |
| Ryder Architecture Limited | Newcastle upon Tyne | A rating |
| RYDER CONSTRUCTION GROUP LTD | Kenley | A rating |
| Ryder Hotels LTD | Llandudno | A rating |
| Ryder Partners Limited T/A The Surrey Cricketers | Windlesham | A rating |
| Ryder-Davies and Partners | Woodbridge | A rating |
| RYDING CARE SERVICES LTD | Wirral | A rating |
| Rye Cricket Club | Rye | A rating |
| Rye Dental Surgery | Rye | A rating |
| Rye garden day nursery | London | A rating |
| RYE NEWS | PECKHAM | A rating |
| Rye Park (Lon) Dry Cleaners LTD | Dulwich | A rating |
| Rye Physiotherapy Clinic | Hastings | A rating |
| Ryebridge Ltd | Luton | A rating |
| Ryecourt Limited | Blackpool | A rating |
| Ryecroft Glenton | Newcastle upon Tyne | A rating |
| RYECROFT VILLAGE STORES LTD T/A PREMIER | Bradford | A rating |
| RYEDALE HOUSE LTD | LEICESTER | A rating |
| Ryedowns Limited T/A Bridge House Care Centre | Wallington | A rating |
| Ryeen Ltd | Richmond | A rating |
| Ryehill Country Lodge Limited | Ulverston | A rating |
| RYELAND RETAIL LTD | LANCASTER | A rating |
| Ryeland Surgery | Leominster | A rating |
| RYEN MART LIMITED | Hyde | A rating |
| Ryff Europe Limited | London | A rating |
| Rygor Commercials Limited | Westbury | A rating |
| RYHN CONSULTANCY LTD | COVENTRY | A rating |
| RYK Halal Limited | Birmingham | A rating |
| Rykco Foods Limited t/a Treatz | Swansea | A rating |
| Rykk Contracts Ltd | Watford | A rating |
| RYL FISHERIES LTD | BRADFORD | A rating |
| RYL VIP CARS LIMITED | London | A rating |
| Rylands Care Limited | Newport | A rating |
| Rylands Nursing Home Ltd | Ballymena | A rating |
| RYMACARE LIMITED | Eastleigh | A rating |
| Ryno Ltd | Cranleigh | A rating |
| Ryobi Aluminium Casting (UK) Ltd | Carrickfergus | A rating |
| RYS CORPORATION LTD T/A World Airport Transfer | Hounslow | A rating |
| RYS HAIR AND BEAUTY LTD | London | A rating |
| RYS RETAIL LTD | Cambridgeshire | A rating |
| Rystad Energy Limited | London | A rating |
| Rysvil Care Services Ltd | Dunstable | A rating |
| RYTON CRICKET CLUB | Ryton | A rating |
| Ryza Trade Ltd | Bolton | A rating |
| RZ ECO ENERGY LTD | Oldham | A rating |
| RZ Enterprise Ltd T/A RZ Homestore and So Kids | Carshalton | A rating |
| RZ Immigration Practice LTD | Wolverhampton | A rating |
| RZBROS LIMITED | Manchester | A rating |
| RZK Textiles Ltd | Rochdale | A rating |
| RZZ Solicitors | Rochdale | A rating |