| Y - Axis United Kingdom Limited | Southampton | A rating |
| Y & A Motors Limited | Luton | A rating |
| Y & G Construction Ltd | Dagenham | A rating |
| Y & L Retail Ltd trading as Londis | Swindon | A rating |
| Y & M Care Ltd | HALSTEAD, SEVENOAKS | A rating |
| Y & M Care Westcott Ltd | Guildford Road | A rating |
| Y & S ENTERPRISE LTD | Heywood | A rating |
| Y & Y (NE) Ltd | Darlington | A rating |
| Y & Y (UK) LIMITED | M13 0PD | A rating |
| Y AND A Supplies Ltd | Blackburn | A rating |
| Y G BUILDERS LIMITED | LONDON | A rating |
| Y G London Limited | London | A rating |
| Y H A Ltd | Berkshire | A rating |
| Y HERO LTD | Swansea | A rating |
| Y International (UK) Ltd | Birmingham | A rating |
| Y K (UK) LIMITED | Barking | A rating |
| Y K SPICES LTD T/A AKASH TANDOORI RESTAURANT | SURREY | A rating |
| Y P AUTOS NW LTD | Bolton | A rating |
| Y Patel Limited | Chigwell | A rating |
| Y Plas Care Home | Swansea | A rating |
| Y Royalties Ltd | London | A rating |
| Y Sial Limited | Oldham | A rating |
| Y Susilan | London | A rating |
| Y The Yemeni Coffee Co Ltd | Peacehaven | A rating |
| Y TREE Limited | London | A rating |
| Y-YITO (UK) LTD | Kingston | A rating |
| Y. S. Services Limited t/a Embracing Care | Durham | A rating |
| Y.T.D. Ltd | Chertsey | A rating |
| Y&C PROPERTY SERVICES LTD | London | A rating |
| Y&C Wholesale Limited | Edgware | A rating |
| Y&H Falmouth Ltd T/A Falmouth Service Station | Falmouth | A rating |
| Y&L Apparel Ltd | Manchester | A rating |
| Y&T GLOBAL WELLNESS LIMITED | Middlesex | A rating |
| Y&X 2022 LTD | Cambridge | A rating |
| Y&Z Enterprise Limited | London | A rating |
| Y1 Capital Ltd | Glasgow | A rating |
| Y12 Construction Ltd. | Gravesend | A rating |
| Y2 Property Holding Limited | London | A rating |
| Y3 RECRUITMENT LTD | Glasgow | A rating |
| Y77 LIMITED | London | A rating |
| Y8 Home Farm Limited | Leicester | A rating |
| YA CONSULTANT LIMITED | Birmingham | A rating |
| Ya Zheng Group LTD. | Wallington | A rating |
| YAAA FOODS LTD | Lancaster | A rating |
| Yaadgaar | Leeds | A rating |
| Yaadgaar Asian Takeaway | Huddersfield | A rating |
| Yaadgaar Operations LTD | Bradford | A rating |
| YAADGAAR RADCLIFFE LIMITED | Radcliffe-On-Trent | A rating |
| YAADGAR GROUP LTD | READING | A rating |
| Yaal Cash & Carry Ltd T/A One Stop | Aylesbury | A rating |
| Yaal Oil UK Ltd | Leamington Spa | A rating |
| Yaam Partners Limited | London | A rating |
| Yaar Haulage Limited | Preston | A rating |
| Yaatra Ltd T/A Yaatra Restaurant & Bar | London | A rating |
| YAAWIN GLOBAL SPICY SUPERMARKET | BOURNEMOUTH | A rating |
| Yabous Limited | Redhill | A rating |
| Yachting Pages Ltd | Bristol | A rating |
| YADAV HEALTHCARE LIMITED | Glasgow | A rating |
| YADE PHARMA LTD | CHATHAM | A rating |
| Yadly Marketing Company Ltd | Enfield | A rating |
| YAEX LEGAL CONSULTING AND SERVICE LTD | Birmingham | A rating |
| Yafi Travel and Tour Ltd | LONDON | A rating |
| YAGAN LTD | Brighton | A rating |
| YAGANTI CONSULTANTS LTD | London | A rating |
| Yagro Ltd | Cambridge | A rating |
| Yagshree Consultancy Limited | London | A rating |
| Yahesa Accounting Ltd | London | A rating |
| Yahoo AD Tech Holdings Limited | LONDON | A rating |
| Yahoo-UK Limited | London | A rating |
| YAHYA & CO ACCOUNTANTS LTD | London | A rating |
| Yahya & Yousaf Brothers Ltd | Dunstable | A rating |
| Yak & Yeti Restaurant Limited | Shrewsbury | A rating |
| Yak and Yeti | Truro | A rating |
| Yak The Himalayan Kitchen Ltd | Old Town Swindon | A rating |
| YAKAMOZ YORK LIMITED | York | A rating |
| YakChat Ltd | Chepstow | A rating |
| Yaki Ya! Ltd | London | A rating |
| Yakimono Food Ltd | ESSEX | A rating |
| YAKINORI SOLIHULL LTD | Solihull | A rating |
| Yako Limited T/A Yako | Pinner | A rating |
| Yaksh Limited | Barnet | A rating |
| Yakub Chemists Ltd | Leicester | A rating |
| YAKUB IBRAHIM DADABHAI & ZUBEDA HUSEIN TA WEST PARK LAUNDRETTE | LEEDS | A rating |
| Yakult UK Limited | Chiswick | A rating |
| Yakut Limited | York | A rating |
| Yalamanchili International UK Limited | London | A rating |
| Yale University Press London | London | A rating |
| Yall Express Retail Ltd | Burwash | A rating |
| Yalla Dev Ltd | London | A rating |
| Yam dairy Limited | Bradford | A rating |
| YAM TRADING LTD | Enfield | A rating |
| Yamabahce Limited | London | A rating |
| Yamaha Music Europe GmbH (UK) | Milton Keynes | A rating |
| Yamama Group Ltd | Liverpool | A rating |
| YAMAN ACADEMY LTD | LONDON | A rating |
| Yamato Ltd | Edinburgh | A rating |
| Yamato Scale Dataweigh (UK) Ltd | Leeds | A rating |
| Yamato Transport Europe B.V. | Hounslow, | A rating |
| YAMAZAKI MAZAK (UK) LIMITED | WORCESTER | A rating |
| Yamin Ltd - t/as The Spice Room | Moreton-In-Marsh | A rating |
| YamnaCo Ltd | London | A rating |
| Yamunaji Limited T/A SV Store and Premier | Essex | A rating |
| YANABIYA GULF INTERNATIONAL UK LTD | MORDEN | UK Expansion Worker: Provisional |
| Yanfitness Ltd | Birmingham | A rating |
| Yang & Partners Ltd | Chessington | A rating |
| Yang Ming (UK) Limited | Romford | A rating |
| YANG TECHNOLOGY LTD | London | A rating |
| YANG YUEN TANG LIMITED | WEMBLEY | A rating |
| YANGFAN CONSULTING MANAGEMENT LIMITED | Guildford | A rating |
| Yanis Foams And Mattresses Limited | london | A rating |
| Yanis Support and Care Provisions | Norwich | A rating |
| YANKEES TAKEAWAY | Paignton | A rating |
| YANSH TECHNOLOGIES LTD | Amersham | A rating |
| Yaojiang Construction Engineering Ltd | London | A rating |
| YAP Global ltd | London | A rating |
| Yap Plant Maniax LTD | London | A rating |
| YAPI LIMITED | MAIDENHEAD | A rating |
| YAPIARTI LTD | London | A rating |
| Yapily Limited | LONDON | A rating |
| Yaplex Ltd | Chesterfield | A rating |
| YAPPA PVT LTD | LONDON | A rating |
| Yapstone UK Limited | London | A rating |
| Yaqub & Co Chartered Accountants | Bristol | A rating |
| Yara Capital Limited | London | A rating |
| YaRa Consulting LTD | Wolverhampton | A rating |
| YARA ENTERPRISES LTD | Harrow | A rating |
| Yara UK Limited | Grimsby | A rating |
| Yarborough Care Ltd T/A Yarborough House Residential Care Home | Grimsby | A rating |
| Yard Associates Ltd | Cardiff | A rating |
| YARD SOHO LIMITED | LONDON | A rating |
| Yardbirds Chicken Ltd | Birmingham | A rating |
| Yardbourne Limited T/A Powered Access Services | Ellis Town | A rating |
| Yardi Systems Limited | Milton Keynes | A rating |
| Yardley of London Ltd | Windsor | A rating |
| YardLink Ltd | London | A rating |
| YARL LTD | Dorking | A rating |
| Yarl Petroleum Ltd | Hatfield | A rating |
| Yarm Medical Practice | Yarm | A rating |
| Yarm Sports and physiotherapy clinic ltd | Ingleby Barwick | A rating |
| Yarmouth Way Supermarket Ltd | Great Yarmouth | A rating |
| Yarn Market Hotel | Dunster, near Minehead | A rating |
| Yarrowside Ltd t/a Bluebird Care (Wiltshire South) | Salisbury | A rating |
| Yarrowside Ltd trading as Bluebird Care (Wiltshire South) | Salisbury | A rating |
| Yarsa Ltd t/a Mumbai Inn | Leicester | A rating |
| Yas and You Ltd | London | A rating |
| YAS INTERNATIONAL LIMITED | Oldham | A rating |
| YASA Limited | Oxford | A rating |
| YASAH LTD | Lancashire | A rating |
| YASAR KHAN T/A LOWER AUDLEY MOT CENTRE | BLACKBURN | A rating |
| YASEEM BARBER LONDON LIMITED | ILFORD | A rating |
| YASEEN CONSULTANCY LTD | Bristol | A rating |
| YASEEN FRUIT & VEG LTD | London | A rating |
| Yash Chand Limited | London | A rating |
| Yash Retail LTD | Portsmouth | A rating |
| Yash Technologies Europe Ltd | London | A rating |
| Yashhprem Ltd T/A Bombay Nnakka | Staines | A rating |
| YASHICOM LTD | LONDON | A rating |
| Yashin Sushi and Bar | London | A rating |
| YASHNOOR UK LTD | Watford | A rating |
| Yashvi Data Systems Limited | Hounslow | A rating |
| YASIMI FOOD AND WINE LIMITED | GWENT | A rating |
| YASIN AND RUMAN LTD | Tyne And Wear | A rating |
| YASIN'S SLICK N STYLE LIMITED | LONDON | A rating |
| Yasinth Ltd | Hull | A rating |
| Yasir Aftab Chaudhry T/A Whitechurch Convenience Store | Cardiff | A rating |
| Yaskawa Electric UK Ltd | Cumbernauld | A rating |
| Yasmin Cuisine Ltd | Girvan | A rating |
| YASMIN SEWELL LTD | LONDON | A rating |
| YASMIN SPICE LTD T/A SHIMLA | Eastbourne | A rating |
| YASMINABROWNLTD LTD | LONDON | A rating |
| YASO DONCASTER LTD T/As WEST END NEWS & MINI MART-PREMIER | Doncaster | A rating |
| Yaspa Ltd | London | A rating |
| Yasree Works and Trades Limited | Wickford | A rating |
| Yass Limited | London | A rating |
| Yataiya Ltd | London | A rating |
| YATESEA MARINE LTD | Guildford | A rating |
| YATIRIM UK LIMITED | London | A rating |
| Yatizeel Limited | Colchester | A rating |
| Yatson & Co Ltd | Ambleside | A rating |
| Yatton Dental and implant centre | Yatton | A rating |
| YATTON MASTOR & CO LTD | Bristol | A rating |
| Yau Brothers & Company Limited | Southampton | A rating |
| Yavica UK Ltd | London | A rating |
| Yavneh College | Herts | A rating |
| Yavrio Ltd | London | A rating |
| Yawee Foods Ltd | Colchester | A rating |
| YAWIN LTD | St. Leonards-On-Sea | A rating |
| Yaxley Wines Ltd | Yaxley | A rating |
| YAY!STARTER MARKETING LTD | London | A rating |
| YAYCON LTD | LONDON | A rating |
| YayYay Limited | Guildford | A rating |
| YAZ REAL ESTATE LTD | London | A rating |
| Yazaki Europe Limited | Basildon | A rating |
| Yazeb Ltd | Coventry | A rating |
| YAZH IT SOLUTIONS LTD | READING | A rating |
| YB HAIR STUDIO LTD | Selby | A rating |
| YB Holding Ltd trading as Bridge of Don Dental & Aesthetic Clinic | Aberdeen | A rating |
| YBM International Ltd | Tunbridge Wells | A rating |
| Ybrant Core Limited | Coventry | A rating |
| YBSM Partners Ltd | Stratford | A rating |