| W & Co. Ltd | London | A rating |
| W & H Grocers Ltd | Glasgow | A rating |
| W & J A Bishop Ltd | Old Malton | A rating |
| W & S Red Rose Healthcare Limited | York | A rating |
| W & W Wholesale Limited | Manchester | A rating |
| W A E Fox | Tenby | A rating |
| W Brook & Company Solicitors | Rotherham | A rating |
| W C Evans Ltd | London | A rating |
| W Capital Ventures Limited | London | A rating |
| W D Care Ltd | Llanelli | A rating |
| W G Jones Ltd | Verwood | A rating |
| W H Bence Coachworks Ltd | Yate | A rating |
| W H Bloodstock Limited | Newbury | A rating |
| W H Stephens Limited | Belfast | A rating |
| W Hiles Partnership | London | A rating |
| W Horton Gunmakers Ltd | Birmingham | A rating |
| W J & R LIMITED | ESSEX | A rating |
| W J Food Limited | London | A rating |
| W J King (Garages) Ltd | Welling | A rating |
| W J Project Services Limited | London | A rating |
| W J YAPP BEQUEST | LOUGHBOROUGH | A rating |
| W Kearney Ltd | Kilkeel | A rating |
| W L Gore & Associates (UK) Ltd | Livingston | A rating |
| W L POLYMER LIMITED | Skelmersdale | A rating |
| W L West & Sons Ltd | Petworth | A rating |
| W Legal Limited | LONDON | A rating |
| W M Walsh Surfacing Ltd | Sutton | A rating |
| W Mgmt Ltd | London | A rating |
| W Model Management Ltd | Shoreditch | A rating |
| W N ZEE SUPPLIES LTD | Barking | A rating |
| W R Berkley London Staff Limited | London | A rating |
| W R Delights Limited | Walsall | A rating |
| W R FORECOURT RETAIL LTD | Caerphilly | A rating |
| W R N Funnell | Dorking | A rating |
| W R Wilson and Sons | Castle Douglas | A rating |
| W T Pritchard Limited | Denbigh | A rating |
| W-Ink Studio Limited | Islington | A rating |
| W. Corbett & Co, (Galvanizing) Limited | Telford | A rating |
| W. Hodgson (Hartlepool) Limited | Hartlepool | A rating |
| W.A.G. Payment Solutions Plc | London | A rating |
| W.A.M CONTRACTORS LIMITED | Colne | A rating |
| W.A.M. Hospitality Limited | Southampton | A rating |
| W.D. Stephen & Co | Nairn | A rating |
| W.D.M. Limited | Bristol | A rating |
| W.E.Textiles Ltd | Manchester | A rating |
| W.H. Brakspear & Sons Ltd | Henley-on-Thames | A rating |
| W.H.N.M Limited | Warrington | A rating |
| W.M.LONDON LTD | Feltham | A rating |
| W.P. Carey & Co Limited | London | A rating |
| W&C BIRMINGHAM LTD trading as Lucarelli Restaurant Mailbox | Birmingham | A rating |
| W&D UK PVT Ltd | London | A rating |
| W&G Baird | Antrim | A rating |
| W&H Enterprises Limited | Glasgow | A rating |
| W&K Enterprise Ltd t/a Pepe's Piri Piri | Rugby | A rating |
| W&K FOODS CO LTD T/A OODLES WOK | LEAMINGTON SPA | A rating |
| W&R Wilkins Limited | London | A rating |
| W&S PARTNERS LTD | Reigate | A rating |
| W&W Trading and Consulting Limited | London | A rating |
| W11 Developments Ltd | Wendover | A rating |
| W13 LTD | Willenhall | A rating |
| W1M Wealth Management Limited | London | A rating |
| W2 LDN Limited | London | A rating |
| W3DPRINT LTD | Colchester | A rating |
| W3FC LTD | Christchurch | A rating |
| W3Partnership Ltd | Milton Keynes | A rating |
| W4 Films Ltd | Chiswick | A rating |
| W45 Media Ltd | Rochdale | A rating |
| W6W Ltd | Skipton | A rating |
| W9 Carpets Ltd | London | A rating |
| WA & BRO LTD | Birmingham | A rating |
| Wa Cafe and Patisserie Limited T/A Wa Cafe | London | A rating |
| WA Communications Ltd | London | A rating |
| WA CORPORATE AND EVENTS LTD T/A WILDABOUT FLOWERS STUDIO | LONDON | A rating |
| WA HEATING SERVICES LTD | Southall | A rating |
| WA Properties Ltd | Manchester | A rating |
| WA SPICEATION ABERDEEN LIMITED | ABERDEEN | A rating |
| Waa Construction Ltd | Enfiled | A rating |
| WAA INVESTMENTS LTD | Dunfermline | A rating |
| WAAM3D Limited | Milton Keynes | A rating |
| Waash Group Chesterfield Ltd t/a Hazeldene House Residential Home | Chesterfield | A rating |
| WAASH GROUP LTD T/A The Beeches Care home | Castleford | A rating |
| Wabtec UK Limited | Doncaster | A rating |
| WABTRADERS LTD | London | A rating |
| WACHSMAN UK LIMITED | London | A rating |
| Wack Services Ltd trading as Pizza Go Go | Slough | A rating |
| Wacker Chemicals Ltd | Bracknell | A rating |
| Wacker Neuson Ltd | Stafford | A rating |
| Wacky Kingdom Group Limited T/A Wacky Kingdom | Kingston-upon-Thames | A rating |
| WACOAL EMEA Ltd | Desborough | A rating |
| WADA EXPRESS LTD | EDGWARE | A rating |
| Waddon Convenience Store | Croydon | A rating |
| Wade Building Services Limited | Tipton | A rating |
| Wadsley Parish Church | Sheffield | A rating |
| Waer Systems Limited | Shoreham by Sea | A rating |
| Wafer Enterprises Ltd. | Londonderry | A rating |
| Waferwire UK Limited | Winnersh | A rating |
| Waffelato Limited | Eccles | A rating |
| Waffle Tech Limited | Brighton | A rating |
| Waffleicious | Keswick | A rating |
| Wafra Europe Limited | London | A rating |
| WAFRI TRADING LIMITED T/A BP | Rushden | A rating |
| Wagamama Limited | London | A rating |
| Waggener Edstrom Worldwide Limited | London | A rating |
| WAGGY DEN LTD | London | A rating |
| WAGO LIMITED | Rugby | A rating |
| Wah Ji Wah Ltd t/a Wah Ji Wah | Manchester | A rating |
| Wah Kwong Maritime Services (UK) Company Limited | London | A rating |
| WAH WAH MIRCHI FROZEN FOODS LTD | Birmingham | A rating |
| WAHABZAI BROTHERâ??S LIMITED | Manchester | A rating |
| Wahad Ltd | Nottingham | A rating |
| Wahed Invest Ltd | London | A rating |
| Waheed Ahmed | Oldham | A rating |
| Waheguru Trading Ltd | Caterham | A rating |
| WAHID ENTERPRISES LIMITED | London | A rating |
| WAHLA CONSTRUCTION LTD | Walsall | A rating |
| Wailian Education Group Limited | London | A rating |
| WAINBRIDGE LTD | London | A rating |
| Waincare Limited | Croydon | A rating |
| Wainfleet Care Home | Wainfleet all Saints | A rating |
| Wainford House Residential Care Home Limited | Beccles | A rating |
| Waingels College | Reading | A rating |
| WAINSCOTT STORES AND NEWSAGENTS | ROCHESTER | A rating |
| Waita Natural Ltd | London | A rating |
| WAJID HUSSAIN T/A CH BUILDERS | BLACKBURN | A rating |
| WAJIEST GLOBAL LIMITED | Sheffield | A rating |
| WAK ELECTRICAL SOLUTIONS LIMITED | Manchester | A rating |
| WAKAM | London | A rating |
| WAKAWAKA LTD TRADING AS WAKA ASIAN FUSION | BELFAST | A rating |
| WAKAZE LIMITED | Leicester | A rating |
| Wake QA Ltd | Worthing | A rating |
| Wake Up Productions Limited | London | A rating |
| Wakefield Home Care Limited t/a Home Instead Wakefield | Doncaster | A rating |
| Wakefield Metropolitan District Council | Wakefield | A rating |
| Wakefield Plumbing & Bathrooms Ltd | Wakefield | A rating |
| Wakefield Road Dental Surgery | Bradford | A rating |
| Wakefield Thornes Cricket Club | Wakefield | A rating |
| Wakefield Visionplus Limited t/a Specsavers Limited | Wakefield | A rating |
| Wakeflow Ltd | London | A rating |
| Wakeful FR261 LLP | Fraserburgh | A rating |
| WAKEUUP LTD | Manchester | A rating |
| WAKF INVESTMENTS LTD | Ilford | A rating |
| WAKT Group Ltd | Hyde | A rating |
| WAKUSEI LTD | Hemel Hempstead | A rating |
| WAL CONSULTANCY | WALTHAMSTOW | A rating |
| WAL G LIMITED | London | A rating |
| Walbrook Institute London Limited | London | A rating |
| Walc Ltd | Swanage | A rating |
| Walcot Hopkins Ltd | London | A rating |
| Walden Digital UK LTD | Bedford | A rating |
| Walden Way & Company Ltd | London | A rating |
| Waldencast UK Operations Ltd | London | A rating |
| Walderslade Mini Mart | Chatham | A rating |
| Walderslade Surgery | Barnsley | A rating |
| WALDON FRUIT LIMITED | LEYTON | A rating |
| Wales Bonner | London | A rating |
| Wales England Care Ltd | Risca | A rating |
| Wales Millennium Centre | Cardiff | A rating |
| Walfinch Mid & South Buckinghamshire | High Wycombe | A rating |
| Walgate Services Limited | London | A rating |
| WALHAM LIMITED T/a Jahangir Balti & Tandoori Restaurant | St Andrews | A rating |
| Walhampton School | Lymington | A rating |
| Wali Ul Asr Trust | Edinburgh | A rating |
| WALI'S ENTERPRISES LIMITED | Chorley | A rating |
| WALIA TRANSPORT LIMITED | Dudley | A rating |
| WALIMKIN TRADING LTD | Finsbury Park | A rating |
| Walk & Talk Bradford Ltd | Bradford | A rating |
| Walk On Water International Ltd | London | A rating |
| Walk-In The Gate Limited | London | A rating |
| Walkden Cricket Club | Walkden | A rating |
| Walkden Medical Centre | Walkden | A rating |
| Walker & Smith Limited | Batley | A rating |
| Walker & Watts Limited | Burgess Hill | A rating |
| Walker B Ltd ta Signs Express Bristol | Bristol | A rating |
| Walker Cole International Ltd | London | A rating |
| Walker Convenience Store Limited | London | A rating |
| Walker Crips Group PLC | London | A rating |
| Walker Family Law | Exeter | A rating |
| Walker Filtration | Sunderland | A rating |
| Walker Hamill Limited | London | A rating |
| Walker Modular Limited | Hull | A rating |
| Walker Morris LLP | Leeds | A rating |
| Walker Morris Resources Limited | Leeds | A rating |
| Walker Mower Partnership Limited | Dartford | A rating |
| Walker Sime | Manchester | A rating |
| Walker Slater Limited | Edinburgh | A rating |
| Walkers (Europe) | London | A rating |
| Walkers Chocolates Limited | Birmingham | A rating |
| WALKERS SNACKFOODS LTD | Reading | A rating |
| Walking on Earth Ltd | London | A rating |
| WalkMe UK Limited | London | A rating |
| Wall Colmonoy Ltd | Swansea | A rating |
| WALL FRAMES & MOULDING LTD | Glasgow | A rating |
| Wall Hill Care Home Limited | Leek | A rating |
| Wall of Death Ltd | Ely | A rating |
| Wall-Lag (Wales) LTD | Mold | A rating |
| wall2wall carpets and flooring | Bolton | A rating |
| WALL2WALL CARPETS AND FLOORING LIMITED | Bolton | A rating |
| Wallace Collection | London | A rating |
| Wallace HCL Ltd | London | A rating |
| Wallace House | Hertford | A rating |