| RDS Fire and Security Ltd | Braintree | A rating |
| RDSS Care Limited | Windsor | A rating |
| RDT Engineers (UK) Limited | Derby | A rating |
| RDV Management Ltd t/a Chennai Kitchen | New Malden | A rating |
| RDX INC LIMITED | Bury | A rating |
| RDX Works Ltd | London | A rating |
| RE Lodge Holdings Limited | Ely | A rating |
| RE Projects Development | RIchmond | A rating |
| RE Recruitment (a Trading Division of Taskmaster Resources Limited) | Cheltenham | A rating |
| RE Thompson & Co (Vacuum) Ltd | Whitchurch | A rating |
| Re-Boot Care Services Ltd | Gloucester | A rating |
| re-form landscape architecture (2023) limited | Manchester | A rating |
| re-form landscape architecture limited | Leeds | A rating |
| RE-FORM SPORTS FITNESS LTD | Ipswich | A rating |
| Re-Gen Robotics Limited | Newry | A rating |
| Re-Gen Waste Limited | Newry | A rating |
| RE-IMAGINE CARE CIC | COVENTRY | A rating |
| Re-Leased Software Company UK Limited | London | A rating |
| Re-style Grooming Haringey LTD | London | A rating |
| Re-Tec Ltd | Deeside | A rating |
| Re-Tek UK Limited t/a CITg UK | Glasgow | A rating |
| Re-Think Inside Ltd | London | A rating |
| Re-Tribe | London | A rating |
| Re-Vana Therapeutics LTD | Belfast | A rating |
| RE:ACT MARKETING | London | A rating |
| Re:Co Insights Ltd | London | A rating |
| RE:GEN Group Ltd | Sunderland | A rating |
| Re:Hope Next Generation Bible Church | Glasgow | A rating |
| Re:Ignite Church | Blackburn | A rating |
| Re:shape Opco Ltd | London | A rating |
| RE5Q Services Ltd | London | A rating |
| Re7 Capital Ltd | London | A rating |
| REA ADVISORY LTD | London | A rating |
| REA CONSTRUCTION LTD | Upminster | A rating |
| Rea Hill Farm Ltd | Newtownabbey | A rating |
| Reable Health Ltd | Wantage | A rating |
| Reach Active Ltd | Hertford | A rating |
| Reach Advocacy Ltd. | Coatbridge | A rating |
| Reach Business Support LTD | Staines Upon thames | A rating |
| REACH COFFEE LIMITED T/A REACH | London | A rating |
| Reach Contact Limited | Woking | A rating |
| REACH FOOD SERVICE LTD | Hayes | A rating |
| Reach Healthcare G82161 | Walderslade | A rating |
| Reach Healthcare Solutions Ltd | London | A rating |
| Reach Housing and Enablement Services Limited | Sutton in Ashfield | A rating |
| Reach Industries | Tonbridge | A rating |
| Reach Learning Disability | Southwell | A rating |
| Reach London Limited | Rickmansworth | A rating |
| Reach Manpower Ltd | Wembley | A rating |
| REACH ON LTD | London, | A rating |
| Reach plc | London | A rating |
| Reach South Academy Trust | Plymouth | A rating |
| Reach Studios Limited | Rotherham | A rating |
| Reach Subsea UK Limited | Aberdeen | A rating |
| REACH TELECOM LIMITED | London, | A rating |
| REAch2 Academy Trust | Burton Upon Trent | A rating |
| Reachdesk Ltd | London | A rating |
| Reachers Cars and Minibuses Limited | Watford | A rating |
| Reaching 4 Christ | Birmingham | A rating |
| ReachOut24 Healthcare Ltd | Crawley | A rating |
| React Business Services | Croydon | A rating |
| REACT Engineering | Warrington | A rating |
| REACT HCP LTD | MANCHESTER | A rating |
| REACT INDUSTRIAL SOLUTIONS | BICESTER | A rating |
| Reacta Biotech Limited | Deeside | A rating |
| Reactive Technologies Limited | London | A rating |
| Read - The Reading Agency | London | A rating |
| Read and simonstone pharmacy | Read | A rating |
| Read Cricket & Bowling Club | Burnley | A rating |
| READ EDUCATION SERVICES | London | A rating |
| Read Foundation | Manchester | A rating |
| Read Roper and Read Solicitors L | SALFORD | A rating |
| READDLE LABS LTD | London | A rating |
| Readesmoor Medical Centre | Congleton | A rating |
| Reading Beauty Training Limited | Reading | A rating |
| Reading Borough Council | Reading | A rating |
| Reading Building Services Ltd | Reading | A rating |
| Reading Buses | Reading | A rating |
| Reading Cricket & Hockey Club | Reading | A rating |
| READING ESTATE AGENT LTD | Reading | A rating |
| Reading Family Church | Reading | A rating |
| Reading Foods Ltd | Slough | A rating |
| READING HALAL CHINESE LTD T/A WAN CHOI | Reading | A rating |
| Reading Heating & Plumbing Ltd | Reading | A rating |
| Reading Hindu Centre | Reading | A rating |
| Reading Hotel Operating Company Ltd T/A Ibis Styles Reading Oxford Road | Reading | A rating |
| Reading Islamic Centre | Reading | A rating |
| READING KEBAB CORNER UK LTD TA KEBAB CORNER | Reading | A rating |
| Reading Local Ltd | Reading | A rating |
| Reading Marketing Ltd | Brighton | A rating |
| READING MOBILE ACCESSORIES LTD | Reading | A rating |
| READING PIZZA COTTAGE LIMITED TA Pizza Cottage Reading | Reading | A rating |
| Reading Rockets | Reading | A rating |
| Reading School | Reading | A rating |
| Reading Shoulder Unit Ltd. | Reading | A rating |
| Reading Solutions UK Limited | Gateshead | A rating |
| Reading Specsavers Hearcare Limited | Reading | A rating |
| READING STAINED GLASS | READING | A rating |
| READING THM LTD | England | A rating |
| READING TOURISM LTD | LONDON | A rating |
| Reading Visionplus Limited t/a Specsavers | Reading | A rating |
| READY 2 DRIVE LTD | DUNSTABLE | A rating |
| Ready Care Private Limited | Nottingham | A rating |
| READY CARE SERVICES LIMITED | Rickmansworth | A rating |
| READY CARS LIMITED | London | A rating |
| Ready Egg Products Ltd | Lisnaskea | A rating |
| Ready Job Ltd | Oxford | A rating |
| READY MONEY LTD | LONDON | A rating |
| READY STEADY GO PRE-SCHOOLS LTD | London | A rating |
| READY TO BUILD LTD | Hayes | A rating |
| Ready4Life Limited | Dudley | A rating |
| ReadyPeople Ltd | Leigh-on-Sea | A rating |
| Reaforma Ltd | London | A rating |
| Real Action (QPCT) Ltd. | London | A rating |
| Real Animation Works Ltd | London | A rating |
| REAL ASSETS ADVISERS LTD | LONDON | A rating |
| Real Authentic Ltd | London | A rating |
| Real Care Support Ltd | Preston | A rating |
| Real Carpets Ltd | Birmingham | A rating |
| Real Deals Media Ltd | London | A rating |
| Real Domain Holdings LTD | Manchester | A rating |
| Real Dreams Consultancy Services Limited | South Harrow | A rating |
| REAL EMPIRE LTD | Newhaven | A rating |
| Real Energy Limited | Birmingham | A rating |
| REAL ESTATE LONDON LIMITED | London | A rating |
| Real Estate Venture Capital Management LLP | London | A rating |
| Real Estate: UK | Edinburgh | A rating |
| Real Fundraising Limited | London | A rating |
| Real Group Ltd | Canterbury | A rating |
| Real Health Supplements Ltd | London | A rating |
| Real Homecare limited | Tottenham | A rating |
| Real Hospitality Ltd T/A Red Lion Hotel | Norfolk | A rating |
| Real Imaging Ltd | Hull | A rating |
| Real India Taste Limited | HAMPSHIRE | A rating |
| Real Italian Food limited | Cambridge | A rating |
| Real Life Ministries | London | A rating |
| Real Mission Limited | London | A rating |
| Real Music Academy Ltd | Oldham | A rating |
| Real Patisserie | BRIGHTON | A rating |
| Real People Ltd | Essex | A rating |
| Real Pharma Solutions Ltd T/A Green Street Pharmacy | Kent | A rating |
| Real PM Ltd | London | A rating |
| Real Resource Ltd | Slough | A rating |
| REAL RIVET ACCOUNTNACY LTD | DUDLEY | A rating |
| Real Software Systems, LLC | London | A rating |
| REAL SOUL FOOD LIMITED TRADING AS DABBAWAL | TYNE AND WEAR | A rating |
| REAL TASTE (LONDON) LTD T/A REAL TASTE | LONDON | A rating |
| Real Taste of India (PVT) Ltd | Croydon | A rating |
| Real Thai Cooking ltd | Watford | A rating |
| Real Time Media Ltd | Finchley | A rating |
| Real Time Video LTd | Reading | A rating |
| Real Time Visualisation Ltd | Preston | A rating |
| Real Trading Ltd | Birmingham | A rating |
| Real Transfer Limited | London | A rating |
| Real Vets Ltd | Hamilton | A rating |
| Real Village Feast Ltd | Surrey | A rating |
| Real World Records Ltd | Corsham | A rating |
| RealD Europe Limited | Hemel Hempstead | A rating |
| Realeyes Data Services Limited | London | A rating |
| Realeyes LTD | Mitcham | A rating |
| Realforce Ltd | York | A rating |
| Realfoundations Ltd | London | A rating |
| Realisable Software Ltd | London | A rating |
| REALITY CHECK SYSTEMS EMEA LTD | AMERSHAM | A rating |
| Reality Church London | London | A rating |
| Reality Holdings Ltd | London | A rating |
| RealityMine Limited | Manchester | A rating |
| Reall Limited | Coventry | A rating |
| Really Flexible Care Ltd | Leicester | A rating |
| Really Happening Ltd | East Dulwich | A rating |
| Really Secure Company Limited | Redditch | A rating |
| ReallyEnglish.com Ltd | London | A rating |
| Realm Fire & Security Ltd | Aberdeen | A rating |
| Realm Investment House UK Ltd | London | A rating |
| Realm Staffing Solutions Ltd | Stevenage | A rating |
| REALMPARK HEALTH CARE (PETWORTH) LIMITED | New Barnet | A rating |
| Realocate Limited | London | A rating |
| REALREDCLICK LTD | Hampshire | A rating |
| REALSTAR MANAGEMENT (UK) LIMITED | London | A rating |
| Realterm Europe Management UK Ltd | London | A rating |
| REALTIME CIVIL ENGINEERING LIMITED | Potters Bar | A rating |
| Realtime Tech Ltd | Chawston | A rating |
| REALTY CORPORATION LTD | Barnet | A rating |
| Realty Income Limited | London | A rating |
| REALVIBE ENTERTAINMENT LTD | London | A rating |
| RealVNC Limited | Cambridge | A rating |
| REALWAY LTD t/A DHE CHAYAKKADA | London | A rating |
| Realway Saver | Bootle | A rating |
| Reamcare Limited | Thames Ditton | A rating |
| Reane Ltd t/a Savages Pharmacy | Burnham on Crouch | A rating |
| Reapit Ltd | London | A rating |
| Reardon Williams Group Limited | Woking | A rating |
| Reask UK Limited | London | A rating |
| Reason Care Limited | Newark | A rating |
| Reason Care Limited | Newark-on-Trent | A rating |
| Reason Digital | Manchester | A rating |
| Reasoon Limited T/A Eunice | London | A rating |
| Rebanho Ltd | Bradford | A rating |
| REBANK TECHNOLOGIES LIMITED | London | A rating |
| Rebear Properties Ltd | Kilburn | A rating |