| NS INFRA ESTATE SLOUGH LTD | Slough | A rating |
| NS INTELLIGENCE HOLDINGS LTD | Wantage | A rating |
| NS MEDIA GROUP | LONDON | A rating |
| NS Mobile Solutions Limited | Chard | A rating |
| NS PHARMA LIMITED T/A ALPHA PHARMACY | London | A rating |
| NS Services Ltd | Manchester | A rating |
| NS Solutions IT Consulting Europe Ltd | London | A rating |
| NS United Shipping (UK) Limited | London | A rating |
| NS11 LTD | Nelson | A rating |
| NSAH (Alliance Homes) Limited | Portishead | A rating |
| NSC Global Limited | London | A rating |
| NSC Trading Limited | Barkingside | A rating |
| Nscale Operations (UK) Limited | London | A rating |
| NSD HAULAGE LTD | Ipswich | A rating |
| NSD Potatoes Ltd | Biggleswade | A rating |
| NSD TRADING LIMITED | Belfast | A rating |
| NSF Safety and Quality UK Limited | LONG HANBOROUGH | A rating |
| NSG Media Limited | Manchester | A rating |
| NSI Consultancy Ltd | London | A rating |
| NSI INDUSTRIAL O&M SOLUTIONS LTD | Truro | A rating |
| Nsibandze Outsourcing | London | A rating |
| Nsibidi Limited | Chatham | A rating |
| NSJ RETAIL LTD T/A KIMS NEWS | UPPER NORWOOD | A rating |
| NSK Europe Limited | Maidenhead | A rating |
| NSK Trading Ltd t/a Manjaros | Leicester | A rating |
| NSK United Kingdom Ltd | Hertfordshire | A rating |
| NSM Enterprises Ltd | Rochdale | A rating |
| NSM Foods Limited | Winchester | A rating |
| NSN Local Express Ltd | Wealdstone, Harrow | A rating |
| NSN TRADERS LTD | HENLEY-ON-THAMES | A rating |
| NSP Cases Limited | Maidstone | A rating |
| NSR CARE HOME LTD | BANSTEAD | A rating |
| NSRM Limited | Newcastle Upon Tyne | A rating |
| NSS Properties Ltd | Leeds | A rating |
| NST ENTERPRISE LTD | LONDON | A rating |
| NSTT GLOBAL 1 LIMITED | London | A rating |
| NSX Ltd. | Ipswich | A rating |
| NT GLAZING LTD | Uxbridge | A rating |
| NT INTERNATIONAL PLC | BIRMINGHAM | A rating |
| NT Island Operations Ltd | Bristol | A rating |
| NT TRADERS LTD | Ilford | A rating |
| NTA Adikari Limited | Selby | A rating |
| NTA PVT. LIMITED | Cosham | A rating |
| Ntec support services | Enfield | A rating |
| Ntek Consultancy Ltd | Hounslow | A rating |
| Nten Ltd | Glasgow | A rating |
| Nteractive Consulting & Events Ltd | Staines-upon-Thames | A rating |
| NTG Europe (UK) Limited | London | A rating |
| NTJ DESIGN AND BUILD LIMITED | Harpenden | A rating |
| NTK EVENTS LIMITED | London | A rating |
| NTLFUTUREGROUP LTD | Redhill, England | A rating |
| NTN Bearings (UK) Limited | Lichfield | A rating |
| Ntropy Network, Inc | London | A rating |
| NTRS LTD | London | A rating |
| NTS Cambridge Holding Ltd | Cambridge | A rating |
| NTS LIVE LTD | London | A rating |
| NTS Motor Fuel Ltd | Hereford | A rating |
| NTS Retail Limited | New Malden | A rating |
| NTT Cloud Communications UK Ltd | London | A rating |
| NTT Data Business Solutions Limited | London | A rating |
| NTT DATA Services UK Limited | London | A rating |
| NTT DATA UK LIMITED | London | A rating |
| NTT Finance UK Limited | London | A rating |
| NTT Global Data Centers EMEA UK Ltd | Hemel Hempstead | A rating |
| NTT Limited | London | A rating |
| NTT Ltd Group Services United Kingdom Limited | London | A rating |
| NTT UD Europe Ltd | London | A rating |
| NTT United Kingdom Limited t/a NTT | London | A rating |
| nTtau Digital Ltd | Oxford | A rating |
| NTUK Trading Co. Limited | Doncaster | A rating |
| NU ADDISCOMBE LTD | CROYDON | A rating |
| NU BOYANA UK LTD | LONDON | A rating |
| NU Creative Ltd | London | A rating |
| NU MOTTINGHAM LIMITED T/A NISA LOCAL | LONDON | A rating |
| Nu Nano Ltd | Bristol | A rating |
| Nu Quantum Ltd | Cambridge | A rating |
| NU TEXTILES LONDON LTD | LONDON | A rating |
| NU TRADING LAKESIDE LTD | Grays | A rating |
| NU WAVE MEDI SPA LTD | Ealing Broadway | A rating |
| NU WEB SYSTEMS LTD | Manchester | A rating |
| Nualnoi Newson t/a Luk Thai | Cambridge | A rating |
| Nubah Social Care Ltd | London | A rating |
| Nubetech Limited | Maidstone | A rating |
| Nubiacom Ltd | Corby | A rating |
| Nubian Hair Salon | CHEMSFORD | A rating |
| Nubridge Publishing Limited | London | A rating |
| Nucco Brain Studio Limited | London | A rating |
| Nuchem Pharmaceuticals Ltd | London | A rating |
| Nuclear Decommissioning Authority | Moor Row | A rating |
| Nuclear Restoration Services Limited | Warrington | A rating |
| Nuclear Waste Services Ltd | Calderbridge | A rating |
| Nucleome Therapeutics Limited | Oxford | A rating |
| Nuclera Ltd. | Impington | A rating |
| Nucleus Financial Group Limited | London | A rating |
| Nucleus Group Services Limited | Salisbury | A rating |
| Nucore Group Limited | Aberdeen | A rating |
| NUCSOFT LTD | Wembley | A rating |
| Nudawn Housing and Support Services ltd | London | A rating |
| Nudge Education | Tyne and Wear | A rating |
| Nudge Global Limited | London | A rating |
| Nudic Private Limited | Barking | A rating |
| Nue Innovation Limited | london | A rating |
| NUE INTERIORS LIMITED | Morden | A rating |
| NUE OFFSHORE RESOURCES UK LIMITED | NEWBRIGE | A rating |
| NUEVA BUSINESS CONSULTING LIMITED | BRENTFORD | A rating |
| Nuevo Healthcare Ltd | London | A rating |
| Nufarm UK Limited | Bradford | A rating |
| Nuffield Foundation | London | A rating |
| Nuffield Health - Hospitals Division | Epsom | A rating |
| Nuffield Road Medical Centre | Cambridge | A rating |
| Nuffield Technologies Ltd | Poole | A rating |
| Nufox Rubber Limited | Manchester | A rating |
| Nugen Consultants Ltd | Uxbridge | A rating |
| Nugent Coachworks Ltd | Dungannon | A rating |
| Nugent Estate & Farm Ltd | Portaferry | A rating |
| NUGENT TRAILERS LIMITED | Dungannon | A rating |
| Nugent Vallis Brierley Ltd t/a NVB Architects | Frome | A rating |
| Nugents News Ltd | London | A rating |
| Nugi Technologies UK Ltd | Ealing | A rating |
| Nuha Connections (UK) Limited | London | A rating |
| NUIHH Limited | Harlesden | A rating |
| NUIMAGE CONSULTS LIMITED | Ponteland | A rating |
| Nuisance Limited | London | A rating |
| Nukoko Ltd | Guildford | A rating |
| NULEAF EDUCATION LIMITED | Birmingham | A rating |
| Null Solutions Limited | London | A rating |
| Nullarbor Limited T/A Right at Home South Trafford | Altrincham | A rating |
| Numac Fabrications | NEWRY | A rating |
| Numada Healthcare Ltd | Gosport | A rating |
| Numada Home Care Limited | Rickmansworth | A rating |
| Numatic International Ltd | Chard | A rating |
| Number 1 Vets Limited | Rugeley | A rating |
| Number 10 Ltd | Southall | A rating |
| Number 8 Resourcing Limited | Windsor | A rating |
| Number Care Accountants Ltd | Birmingham | A rating |
| Number One Thai Massage Newcastle LTD. | Newcastle upon Tyne | A rating |
| NUMBER ONE THAI RESTAURANT LTD | SUTTON | A rating |
| NUMBER PLATE CLINIC LTD | BOLTON | A rating |
| NUMBER SEVEN FOOD TECHNOLOGY LIMITED | London | A rating |
| Number13 Ltd T/A Subway | Westbury on Severn | A rating |
| Number1daycare ltd | LONDON | A rating |
| Numberdar Properties Ltd | Leeds | A rating |
| NumberEight Technologies Ltd | Norfolk | A rating |
| NUMBERLY LTD | London | A rating |
| NUMBERS2GO LTD | College way | A rating |
| NUMERATOR UK LIMITED | London | A rating |
| Numerica Risk Management and Consulting Ltd | Leicester | A rating |
| Numeritas Limited | London | A rating |
| Numerix Software LTD | London | A rating |
| Numero Group Ltd | London | A rating |
| Numero Uno Holiday Rentals Ltd T/A Numero Uno Aparthouse | NEWCASTLE UPON TYNE | A rating |
| Numerus Limited | Wokingham | A rating |
| Numi Scan (Brentwood) Ltd T/A Numi Scan | Brentwood | A rating |
| NUMI SCAN (DERBY) LTD | DERBY | A rating |
| Numi Scan (Grimsby) Ltd | Grimsby | A rating |
| Numi Scan Gateshead Ltd. | Gateshead | A rating |
| Numi Scan South East London | London | A rating |
| NunaBio Limited | Newcastle upon Tyne | A rating |
| Nuneaton and Bedworth Borough Council | Nuneaton | A rating |
| Nuneaton Muslim Society | Nuneaton | A rating |
| Nuneaton Specsavers Hearcare Limited | Nuneaton | A rating |
| NUNEATON SUPERMARKET LTD | NUNEATON | A rating |
| Nunhead Express Ltd | London | A rating |
| Nunhead Osteopaths Ltd | London | A rating |
| NUNHEAD PHARMACY LTD | LONDON | A rating |
| Nunn Hayward LLP | GERRARDS CROSS | A rating |
| Nuntiare Media Ltd | Manchester | A rating |
| NUNTIUS THERAPEUTICS LIMITED | London | A rating |
| NUOC CHAM LTD t/a HOP VIETNAMESE | London | A rating |
| Nuova italia restaurant | Ilchester | A rating |
| NUOVO FOODS LIMITED | WEST BROMWICH | A rating |
| NUP S Corporation Limited | Leicester | A rating |
| NuPlanet Sustainable Solutions Limited | Hove | A rating |
| Nuprint Technologies Ltd | Londonderry | A rating |
| Nuptam LTD | Rotherham | A rating |
| NuQ Limited | London | A rating |
| NURANI CONSULTANCY LTD | London | A rating |
| Nurestani Fresh Food Ltd | Leatherhead | A rating |
| Nurgush Ltd | London | A rating |
| Nuria Ma Limited | London | A rating |
| Nuriclima UK Ltd | London | A rating |
| Nuriss Skincare and Wellness Ltd | London | A rating |
| Nurizon International Ltd. | Woking | A rating |
| NURKAS CONSULTANCY LTD | London | A rating |
| Nurol Makina UK Ltd | Leamington Spa | A rating |
| Nurole Ltd | London | A rating |
| NURSE PLUS AND CARER PLUS (UK) LIMITED | Kent | A rating |
| Nurseready Ltd | Mansfield | A rating |
| Nursery Road Capital Management Limited | London | A rating |
| Nursery Village Limited | Bristol | A rating |
| Nursing and Midwifery Council | London | A rating |
| Nursing Care Personnel Ltd | Hertfordshire | A rating |
| NursingPro Limited | London | A rating |
| Nurture Care Services LTD | London | A rating |
| NurtureCare Limited | Nottingham | A rating |
| NURTURED PRIME HEALTH LTD | London | A rating |
| NURTURETEK LTD | London | A rating |
| NURTUREU HEALTHCARE LTD | Bradford | A rating |
| Nurturing Childrens Services Ltd | Huddersfield | A rating |
| Nusa Electrical Ltd | London | A rating |