| Reed in Partnership | London | A rating |
| Reed Online Limited | London | A rating |
| Reed Smith LLP | London | A rating |
| Reed Specialist Recruitment Limited | Raynes Park | A rating |
| Reed Street Fisheries Ltd | Huddersfield, | A rating |
| Reed's School | Cobham | A rating |
| Reeda Safety Ltd t/a Building Transformation | Bedford | A rating |
| Reedbut Group Limited | Milton Keynes | A rating |
| Reedham Stores Company Ltd | Norwich | A rating |
| Reedsfield Care Ltd | Egham | A rating |
| Reedsy Limited | London | A rating |
| Reef Aquatics | Market Rasen | A rating |
| Reef Entertainment Limited | Croydon | A rating |
| Reef Global Assets and Services (UK) Limited | London | A rating |
| Reef London Limited | London | A rating |
| Reekie Knowes Ltd | Beauly | A rating |
| REEL (UK) Limited | Stourbridge | A rating |
| Reelables Europe, Ltd | London | A rating |
| Reeley Ltd | Solihull | A rating |
| reemies Cakes Fulham Ltd | London | A rating |
| reemies cakes limited | London | A rating |
| REEMY MEDICARE LIMITED T/A Laurel Mount Nursing Home | Keighley | A rating |
| Reepham and Aylsham Medical Practice | Aylsham | A rating |
| Reepham High School and College | Norwich | A rating |
| Rees Machinery Group Limited | Newtown | A rating |
| Reeset.earth limited | London | A rating |
| Reeson Care Homes Limited | Wembley | A rating |
| REESRA LTD | Walsall | A rating |
| Reet Riwaj Limited | London | A rating |
| REET SINGH CONSTRUCTION LIMITED | Dagenham | A rating |
| Reeva Retail Limited | Coventry | A rating |
| REEVATE ACQUISITION LIMITED | London | A rating |
| Reeves & Co Solicitors | Ashford | A rating |
| Reeves Butchers Ltd | Bracknell | A rating |
| Reevoy Capital | Edgware | A rating |
| Refcool Refrigeration Ltd | Cullompton | A rating |
| REFERBITS LIMITED | Leeds | A rating |
| Reference Data Services (UK) Ltd | Bristol | A rating |
| Refeyn Limited | Oxford | A rating |
| Refine Architecture Ltd | Sittingbourne | A rating |
| Refine Security Services Ltd | London | A rating |
| Reflec Evolution | Cheshire | A rating |
| Reflect Digital Ltd | Maidstone | A rating |
| Reflect Media Limited | London | A rating |
| Reflection AI UK Ltd | London | A rating |
| Reflection Community Support | Guiseley | A rating |
| REFLECTIONS DENTAL CARE LIMITED | Hayes | A rating |
| Reflex Data Systems Limited | Hull | A rating |
| Reflex Interiors Construction Limited | London | A rating |
| Reflexion Associates Limited | Hemel Hempstead | A rating |
| Reform Architects Limited | Worthing | A rating |
| Reformation UK Limited | London | A rating |
| Reformed Presbyterian Church of Scotland | Airdrie | A rating |
| Refract Software Ltd | Newcastle Upon Tyne | A rating |
| Refresco Drinks UK Ltd | Kegworth | A rating |
| Refresh Church Trust | East Molesey | A rating |
| REFRESH TECH LTD | Blackburn | A rating |
| Refreshment Systems Ltd | Bradford | A rating |
| REFRESHPRICES LTD | Worcester Park | A rating |
| REFRIGERATION & AIR CONDITIONING SUPPLIES LTD | harrow | A rating |
| Refritech Ltd | London | A rating |
| Refuah Centre Ltd | London | A rating |
| Refuel Forecourts Ltd | Leigh | A rating |
| Refuge | London | A rating |
| Refugee Education UK Ltd | Harlesden | A rating |
| Refugee, Asylum seeker and Migrant Action | Colchester | A rating |
| Refugees at Home Limited | London | A rating |
| REFURBISHED STORAGE HEATER SOLUTIONS LIMITED | Keighley | A rating |
| Refuse Vehicle Solutions Limited | Gloucestershire | A rating |
| Refute Ltd | London | A rating |
| REFY BEAUTY LTD | Manchester | A rating |
| REG (UK) Ltd | London | A rating |
| Reg Pharmahub Limited | Slough | A rating |
| Regain Hearing Ltd | Chatham | A rating |
| Regal Balustrades Limited | Bristol | A rating |
| Regal Builders Merchants Ltd | Borehamwood | A rating |
| Regal Care (Darlaston) Ltd T/A The Willows | Wednesbury | A rating |
| Regal Care (Stoke) Ltd T/A Ernvale House | Leek | A rating |
| Regal Care (Worcester) Ltd T/A South Hayes | Worcester | A rating |
| Regal Care Ltd T/A Havencroft | Hopwood | A rating |
| Regal Care Services Limited | Stafford | A rating |
| REGAL CARE SUPPORT | LONDON | A rating |
| Regal Care Trading Ltd | Orpington | B rating |
| REGAL CHOICE LIMITED | St. Albans | A rating |
| REGAL CONSTRUCTION SERVICES LTD | London | A rating |
| Regal Design & Construction Ltd | IVER | A rating |
| REGAL ENVELOPE AND CLADDING SERVICES LTD | Stevenage | A rating |
| Regal Food Products Group Plc | Bradford | A rating |
| Regal Garages Ltd. | Reading | A rating |
| Regal Hampton Properties Ltd | London | A rating |
| Regal Health and Wellbeing Ltd | Harrow | A rating |
| Regal Homes Management Limited | London | A rating |
| Regal Store | Leicester | A rating |
| Regal Technical and Training Solutions ltd | Slough | A rating |
| Regal Transport Ltd | Sutton Coldfield | A rating |
| REGAL TRIO LIMITED | LONDON | A rating |
| REGAL UMBRELLA SERVICES LTD | SHEFFIELD | A rating |
| Regalead Limited | Manchester | A rating |
| Regalia Enterprises Limited | Wembley | A rating |
| Regallite Properties Ltd | Harrow | A rating |
| REGALMARK LIMITED | LONDON | A rating |
| REGALQUAFF LIQUOR HUB LIMITED | London | A rating |
| REGATTA FOOD & WINE LIMITED | Oxfordshire | A rating |
| Regatta Ltd | Manchester | A rating |
| Regeden Limited | Hertfordshire | A rating |
| RegEdge Limited | London | A rating |
| Regen | Exeter | A rating |
| Regen Construction Limited | Newport | A rating |
| Regen Waste Limited | Newry | A rating |
| Regenagri CiC | London | A rating |
| Regenall Limited | LONDON | A rating |
| Regency Car Sales Limited | Buckie | A rating |
| Regency Care Limited T/A The Rise | Fareham | A rating |
| Regency Carpet Manufacturing Limited | Bangor | A rating |
| Regency Chesterfield Ltd | Lancashire | A rating |
| Regency Club (UK) Limited TA The Regency Club | Edgware | A rating |
| REGENCY COTTAGE CLACTON LTD | Clacton-On-Sea | A rating |
| Regency Creative Limited | London | A rating |
| Regency Grove Ltd | Chessington | A rating |
| Regency house dental Practice | Brighton | A rating |
| Regency House Dental Practice | Bridgnorth | A rating |
| Regency House Residential Home | Pontypool | A rating |
| REGENCY LEISURE LIMITED | BIRMINGHAM | A rating |
| Regency Nursing Home | Southsea | A rating |
| Regency Retirement Home | Stonehouse | A rating |
| REGENCY SMART SHOP LTD | LEEDS | A rating |
| Regener8 Power | Guildford | A rating |
| Regenerate Global Limited | London | A rating |
| Regeneron UK Limited | Uxbridge | A rating |
| REGENESIS HEALTH TRAVEL LTD | STRATFORD-UPON-AVO | A rating |
| Regenesis Orthobiologics Ltd | Manchester | A rating |
| Regent College | Harrow | A rating |
| Regent Dental Practice | Cambridge | A rating |
| Regent Dental Practice | KY11 9YD | A rating |
| Regent Education Services limited | Essex | A rating |
| Regent Exhibitions Ltd | Hove | A rating |
| Regent Fire Consultants Limited | Cleckheaton | A rating |
| Regent FM Limited | London | A rating |
| Regent Foreign Exchange Ltd | London | A rating |
| Regent Hall Limited | Bolton | A rating |
| REGENT HOUSING LIMITED | Slough | A rating |
| Regent Letting and Property Management Ltd | London | A rating |
| Regent Office Care Limited t/a Samsic UK | Coventry | A rating |
| Regent Park Group Limited | Weybridge | A rating |
| Regent Pharmacy | Northampton | A rating |
| Regent Pizza Limited T/A Caprinos Pizza | Wrexham | A rating |
| Regent Street Castle Ltd | Leamington Spa | A rating |
| Regent Tandoori Ltd trading as Sonargaon Tandoori | West Wickham | A rating |
| Regent Wine T/A Bargain Buys | Wellingborough | A rating |
| Regent's Park Healthcare | Salisbury | A rating |
| Regent's Park Theatre Ltd | London | A rating |
| Regent's University London Limited | London | A rating |
| REGENTA LTD | Loughton | A rating |
| REGENTS COMPUTER LIMITED | Ilford | A rating |
| REGENTS CONCIERGE LIMITED | London | A rating |
| REGENTS CONSULTANCY LTD | London | A rating |
| Regents Gate Capital LLP | London | A rating |
| Regents Park Limited | Exeter | A rating |
| Regginas Restaurant Ltd | Southampton | A rating |
| Regina Limon Vega Limited | London | A rating |
| REGINALD STORE LTD | Dagenham | A rating |
| Regine Limited | London | A rating |
| Reginson Engineering Limited | Nuneaton | A rating |
| region security guarding ltd | wolverhampton | A rating |
| Regional Care Cambridge | Peterborough | A rating |
| Regional Care Support Service Limited | Peterborough | A rating |
| Regional Contractors Ltd | Leicester | A rating |
| Regional Home From Home | Northampton | A rating |
| Regione Della Campania Limited | Swindon | A rating |
| REGIS CONSULTING LIMITED | London | A rating |
| Regis Entertainment Limited | Essex | A rating |
| Regis Group Services Limited | Southend-On-Sea | A rating |
| Regis Healthcare Ltd | Ebbw Vale | A rating |
| REGIS HOTEL (OPCO) UK S.A. | London | A rating |
| REGIS SPICE LTD | Birmingham | A rating |
| Register's of Scotland | Edinburgh | A rating |
| Registered Office (UK) LTD | London | A rating |
| Registry Surgery Limited | Scunthorpe | A rating |
| Registry Surgery Limited t/a Old Registry Vets | Scunthorpe | A rating |
| Registry Trust Limited | City of London | A rating |
| Reglink Ltd | Surrey | A rating |
| REGNOLOGY FRR UK LIMITED | London | A rating |
| Regnology UK Ltd | London | A rating |
| REGnosys Limited | London | A rating |
| Regnum Ltd | London | A rating |
| REGSIV & AO UK LTD | Southampton | A rating |
| Regtech Consultancy Services LTD | London | A rating |
| REGULAR BLEND LIMITED | London | A rating |
| Regular Cleaning Services Ltd | London | A rating |
| Regular Practice Limited | London | A rating |
| Regulatory Genome Development Ltd | Cambridge | A rating |
| REHA MAINTENANCE LTD | London | A rating |
| Rehab Medical Services Limited | derby | A rating |
| Rehab Physio London Limited | London | A rating |
| Rehab United | Woolpit | A rating |
| Rehabilitation Education and Community Homes Ltd | Gerrards Cross | A rating |
| Rehability UK Community Ltd | Birmingham | A rating |
| REHABILITY UK SUPPORT SERVICES LTD | Birmingham West Midlands | A rating |
| REHAN BARBERS LIMITED | LONDON | A rating |
| REHAN CARS LTD | London | A rating |