| NATIONWIDE ACCOMODATION SERVICES LTD | London | A rating |
| Nationwide Air Conditioning LTD | Edenbridge | A rating |
| Nationwide Building Society | Swindon | A rating |
| Nationwide Care (Finchley) Limited | WHETSTONE | A rating |
| Nationwide Care Services (Birmingham Central) Ltd | Birmingham | A rating |
| Nationwide Care Services (Birmingham South) Ltd | Birmingham | A rating |
| Nationwide Care Services (Derby) Ltd | Derby | A rating |
| Nationwide Care Services (Worcester) Ltd | Worcester | A rating |
| Nationwide Care Services Ltd | Birminham | A rating |
| NATIONWIDE ELECTRICAL & SECURITY WHOLESALERS LTD | WOLVERHAMPTON | A rating |
| Nationwide Express Ltd | London | A rating |
| Nationwide Fostering Limited | Uxbridge | A rating |
| NATIONWIDE HEADSTONE COMPANY LIMITED | Bradford | A rating |
| Nationwide Healthcare Providers Ltd | Nottingham | A rating |
| Nationwide Healthcare Solutions Limited | Bolton | A rating |
| NATIONWIDE HIRE AND STORAGE LTD | Ilford | A rating |
| Nationwide Holdings Limited | London | A rating |
| Nationwide Law Associates | London | A rating |
| Nationwide Lifts & Escalators Ltd | Sunderland | A rating |
| NATIONWIDE LOCUMS LTD | ENGLAND | A rating |
| NATIONWIDE LOGISTICS LIMITED | Coventry | A rating |
| Nationwide Paper Ltd | High Wycombe | A rating |
| Nationwide Platforms Limited | Lutterworth | A rating |
| Nationwide Prestige Service Trading as Pepes Piri Piri | Bedford | A rating |
| NATIONWIDE RETAIL SERVICES LTD | Manchester | A rating |
| Nationwide Retail Solutions Limited | Warrington | A rating |
| Nationwide Roofing (Southern) Limited | Shoreham-by-sea | A rating |
| Nationwide Routes Logistics LTD | Birmingham | A rating |
| Nationwide Security Service Limited | London | A rating |
| NATIONWIDE STRUCTURES LTD | WAKEFIELD | A rating |
| NATIONWIDE SUPPORTING ACCOMMODATION LIMITED | London | A rating |
| Nationwide Utilities Ltd | London | A rating |
| Native AI Ltd | London | A rating |
| Native Broking Ltd | London | A rating |
| Native Care Ltd | Worthing | A rating |
| Native Chartered Architects Ltd | York | A rating |
| Native Design Limited | London | A rating |
| NATIVE FINANCIAL SERVICES LTD | Hayes | A rating |
| Native Instruments UK Ltd | Birmingham | A rating |
| Native Places Limited | London | A rating |
| Native Places Ltd | London | A rating |
| Native Properties LTD | London | A rating |
| Nativevideo Limited | London | A rating |
| Natixis Investment Managers UK LImited | London | A rating |
| Natixis Londres | London | A rating |
| NATO - DIANA | London | A rating |
| Natoora Ltd | London | A rating |
| NatPower Development Limited | London | A rating |
| Natraj Food (Rayners lane) Ltd | Harrow | A rating |
| Natrio UK Ltd | London | A rating |
| NATS Limited | Fareham | A rating |
| Natta Building Company Limited | Farnham | A rating |
| Natter Ltd | Poole | A rating |
| Nattergal Limited | Norwich | A rating |
| Natura Bisse International Limited | London | A rating |
| NATURA CARE SOLUTIONS LIMITED | Slough | A rating |
| Natural Ability | Hexham | A rating |
| Natural Capital Research Limited | London | A rating |
| Natural Capital Solutions Ltd | Towcester | A rating |
| Natural Dimensions Ltd. | Stockport | A rating |
| Natural Exotica Ltd | Sandy | A rating |
| Natural Gas Solutions (UK) Limited | Merseyside | A rating |
| Natural Herb Solution UK Ltd. | New Malden | A rating |
| Natural History Museum | London | A rating |
| Natural Innovations Limited | Beeston | A rating |
| NATURAL KITCHEN BY DEVI LIMITED | Leicester | A rating |
| Natural Nails RD LTD T/A Natural Nails | Redditch | A rating |
| NATURAL NATURAL LTD | UXBRIDGE ROAD | A rating |
| Natural Processing Co. Limited t/a Snappy snaps | London | A rating |
| Natural Products Factory Ltd | London | A rating |
| Natural Remedies Ltd t/a Back Care and Acupuncture Clinic | Walsall | A rating |
| Natural Resources Wales | Bangor | A rating |
| NATURAL SCIENCES MUSEUM RESEARCH LTD | Sheffield | A rating |
| Natural Serenity Ltd | Warrington | A rating |
| NATURAL WAYS BODY BALANCE LIMITED | Ilford | A rating |
| Natural World Products Ltd | Belfast | A rating |
| Naturalight Systems | Bedlington | A rating |
| Naturally Indulgent Ltd | London | A rating |
| Naturally Organic Wholefoods LTD | Hatfield | A rating |
| NaturalMotion Limited | London | A rating |
| NATURALS BEAUTY & SALON LTD | Bromley Kent | A rating |
| Naturbeads Ltd | Malmesbury | A rating |
| Nature Broking Ltd | London | A rating |
| Nature Design LTD | Cirencester | A rating |
| Nature's Best Catering Ltd trading as Lotus Restaurant | Pendine | A rating |
| Nature's Best Services Ltd | Cradley Heath | A rating |
| Nature's Consultancy Limited | Essex | A rating |
| NATURE'S FRESH PRODUCE LTD | LONDON | A rating |
| NatureAlpha Group Ltd | London | A rating |
| Naturecan Ltd | Stockport | A rating |
| NatureDoc Ltd. (Trading address) | Salisbury | A rating |
| NatureMetrics Ltd | Guildford | A rating |
| Natures Hand Care and Support | Ebbw Vale | A rating |
| NATURES MENU LIMITED | SNETTERTON | A rating |
| Natures Way Foods | Selsey | A rating |
| NatureScot | Inverness | A rating |
| NATUZZI SERVICES LTD | London | A rating |
| NatWest Group PLC | Edinburgh | A rating |
| NaudaPay Limited | London | A rating |
| Naughty Pizza ltd | Bedford | A rating |
| NAUREX LIMITED | SWANAGE | A rating |
| NautaDutilh | London | A rating |
| Nautic Steels Ltd | Tamworth | A rating |
| Nautilus Lab Limited | London | A rating |
| NAV Barbers Ltd | Birmingham | A rating |
| NAV BUILDERS LIMITED | Ilford | A rating |
| NAV HEATING & PLUMBING LTD | Hayes | A rating |
| Nav Infotech Ltd | Slough | A rating |
| NAV Mini Market | Wakefield | A rating |
| NAV SECURE LIMITED | Burnley | A rating |
| NAV SECURITY LIMITED | Barking | A rating |
| Nav Van Hire Ltd | Kettering | A rating |
| Nava Art Group UK | London | A rating |
| Navab&Co. Accountants Ltd | WEST EALING | A rating |
| NAVAGRA HOSPITALITY LTD | Essex | A rating |
| Navagrace Limited Trading as Castle Graig Nursing & Residential Home | Swansea | A rating |
| Navajeevan Santhirarasa T/A Augustus Superstore | Coventry | A rating |
| Naval Enterprise Limited | Leicester | A rating |
| Navalmar (UK) Limited | London | A rating |
| NAVAM & CO LTD | Swadlincote | A rating |
| Navam & Pathma Ltd | Sompting | A rating |
| Navamanithevi Rasamohan T/As Ashwin Mini Market | Leeds | A rating |
| Navan Labs UK Limited | London | A rating |
| NAVANA LONDON REAL ESTATE LTD | London | A rating |
| NAVANEETHAN MAHESWARAN T/A COSTCUTTER | NOTTINGHAM | A rating |
| Navantia UK Ltd | London | A rating |
| Navara Beauty & Care Ltd T/A Navara Beauty | Milton Keynes | A rating |
| Navara Browbar (Wellingborough) Limited T/A Navara Beauty | Wellingborough | A rating |
| Navara Browbar Limited T/A Navara Beauty | Woking | A rating |
| NAVARA LODGE RESIDENTIAL CARE HOME | READING | A rating |
| Navaratna South Indian Restaurant Limited | Croydon | A rating |
| NAVARATNAM SATHEESKUMAR T/A EMNETH VILLAGE LOCAL STORE | EMNETH WISBECH | A rating |
| Navarino (UK) Limited | London | A rating |
| Navarros Care Limited T/A Walfinch East Barnet | London | A rating |
| NAVBLUE Ltd. | Walton on Thames | A rating |
| NAVEED & CO (LONDON) LIMITED | Norbury | A rating |
| Naveed Akhtar T/A Nav'z Barber | Bury | A rating |
| Naveed Medicare Ltd | Winchester | A rating |
| Naveed Retail Ltd t/a Spar Store | Perth | A rating |
| NAVENBY NEWS LIMITED | Lincoln | A rating |
| Navenio Limited | London | A rating |
| Navera Investment Management Ltd | London | A rating |
| Navgold Limited | Hatfield | A rating |
| Naviam Global Limited | Carlisle | A rating |
| Navico UK Limited | Southampton | A rating |
| NAVIEN UK LTD | Guildford | A rating |
| Navig8 Europe Ltd | London | A rating |
| Navigate Agency Limited | Bristol | A rating |
| Navigate Digital | London | A rating |
| Navigate Response Limited | London | A rating |
| Navigator Gas | London | A rating |
| Navigator Insight Limited | Leicester | A rating |
| Navigator Paper UK Ltd | Newbury | A rating |
| Navigator Tissue UK Ltd | Blackburn | A rating |
| NAViGO Health and Social Care CIC | GRIMSBY | A rating |
| Navikenz UK Limited | Wokingham | A rating |
| Navillus Print Gifts Limited | London | A rating |
| NaviNet Ltd | Belfast | A rating |
| NAVIS SOFTWARE UK LIMITED | LONDON | A rating |
| Navisite Europe Limited | Surbiton | A rating |
| Navitas Digital Safety Ltd | Coalville | A rating |
| Navitas Life Sciences Limited | Portsmouth | A rating |
| Navitas Petroleum Development and Production Ltd | London | A rating |
| Navitas UK Holdings Limited | Abingdon | A rating |
| Navith Brothers Limited T/A Premier | Deal | A rating |
| Navitron Systems Ltd | Havant | A rating |
| Navkar Solutions Ltd T/A Evington Road Post Office | Leicester | A rating |
| NavLive Limited | Oxford | A rating |
| Navolio Limited | London | A rating |
| Navonmesh Ltd | Sutton | A rating |
| Navraj Hairstylist | Wolverhampton | A rating |
| Navratri Festival Association Manchester | Cheadle Hulme | A rating |
| Navrtar Ltd | London | A rating |
| NAVSA INTERNATIONAL LIMITED | MILTON KEYNES | A rating |
| Navv Associates Ltd | Ilford | A rating |
| NAVYA SCHOOL OF DANCE LTD T/A NAVYA SCHOOL OF DANCE | Middx | A rating |
| NAVYASOFTWARE LTD | Manchester | A rating |
| Navyred Technology and Ecommerce Ltd | London | A rating |
| Navys Technologies Limited | London | A rating |
| NAWAAB CUISINE LIMITED | Blackburn | A rating |
| Nawaab Limited | Sunderland | A rating |
| NAWAABKITCHEN LIMITED T/A NAWAAB INDIAN RESTAURANT | Camborne | A rating |
| NAWAAZ INDIAN RESTAURANT LTD | Leicester | A rating |
| Nawab Gillingham Ltd | Gilingham | A rating |
| NAWAB TASTE LTD | Birmingham | A rating |
| NAWABGANIC LIMITED | London | A rating |
| Nawabi Indian Take Away | Oxford | A rating |
| NAWABS KITCHEN LONDON LTD | Romford | A rating |
| Nawafeth Majestic International Aluminium & Glass Work UK Ltd | Slough | A rating |
| NAWAIE MOTORING LTD | Northolt | A rating |
| Nawwab Saab Nuthall Limited | Nottingham | A rating |
| Naxos Real Estate Ltd | London | A rating |
| NAYA BRIDGE LTD | Abergavenny | A rating |
| Naya Capital Management UK Limited | London | A rating |
| Naya Medicals limited | Bury | A rating |
| NAYAK PROPERTIES LTD | Blackpool | A rating |
| NAYANY SUPERMART LIMITED | NEATH | A rating |
| NayaOne Limited | London | A rating |
| Nayaways Limited | London | A rating |
| Nayee and Sons Limited t/a The Chocolate Box | Radlett | A rating |