| ZHONGZHUO WISDOM UK LTD | London | A rating |
| ZHSP LTD | Birmingham | A rating |
| ZHUIMENG CLOUD UK LTD | London | A rating |
| ZHUYOUYOU LIMITED | WEMBLEY | A rating |
| Zhuzhou CRRC Times Electric UK Innovation Center | Birmingham | A rating |
| Zi Mat Limited | Stokenchurch | A rating |
| ZIA & CO | MANCHESTER | A rating |
| ZIA DISTRIBUTOR LTD | Wembley | A rating |
| ZIA LOGISTICS LIMITED | Wakefield | A rating |
| ZIA PIZZA LTD | Westbury | A rating |
| Zia pizza Semington ltd | Melksham | A rating |
| ZIA PROPERTY MAINTENANCE LTD | London | A rating |
| ZIA UL ULOOM | Wembley | A rating |
| Ziath Ltd | Pampisford | A rating |
| ZIAUM LTD | WALES | A rating |
| ZIBA COLLECTIONS NORTH EAST LTD | Newcastle Upon Tyne | A rating |
| ZIBCO PRAVITE LTD | Leicester, England | A rating |
| Zibdawn Associates Limited | Fleet | A rating |
| Ziche Limited T/A Help Plus | Wakefield | A rating |
| ZIEBE LIMITED | Aylesbury | A rating |
| Ziehl-Abegg UK Ltd | Chelmsford | A rating |
| ZIESHA LTD T/A MARMION RESTAURANT | TAMWORTH | A rating |
| Ziff Davis International Ltd | London | A rating |
| Zifo Technologies Ltd | Southport | A rating |
| Zig zag dance | Wolverhampton | A rating |
| Zigaflow Ltd | LONDON | A rating |
| Zigguratum Limited | Woking | A rating |
| Ziggy Agency Limited | Milton Keynes | A rating |
| ZIGGYBARAJ LTD T/A Mooboo | Lancashire | A rating |
| Zigzag (Petcare Services Ltd) | London | A rating |
| ZigZag Education | Bristol | A rating |
| ZigZag Global Ltd | London | A rating |
| Zihipp Ltd | London | A rating |
| ZII LOGISTICS LTD | London | A rating |
| ZIIDA LIMITED | London | A rating |
| Ziipline Ltd | London | A rating |
| Zik Expert Teachers Ltd t/a Cambridge Tuition Centre | Chatham | A rating |
| ZIKOMO SOLUTIONS LTD | WIMBLEDON | A rating |
| Zikora day Nursery and Preschool | Stratford | A rating |
| ZIKRA CATERERS LTD TA THE GRILL PLUG | CAMBRIDGE | A rating |
| ZILANIS ASIAN GRILL LTD | Halesowen | A rating |
| Zilany Intertrade Ltd | London | A rating |
| Zilch Technology Limited | London | A rating |
| Zilliant Limited | London | A rating |
| ZILO Technology Limited | London | A rating |
| ZIM Connections Ltd | London | A rating |
| Zim UK Ltd | Liverpool | A rating |
| Zimâs Supermarket | Burton-on-Trent | A rating |
| Zimbell Limited | Portslade, BRIGHTON | A rating |
| Zimmer and Peacock Ltd | Smethwick | A rating |
| Zimpli Kids Ltd | Great Harwood | A rating |
| Zimsculpt | Windsor | A rating |
| Zinal Advisors Limited | London | A rating |
| Zinbake Limited | London | A rating |
| ZInc Autos Ltd | Ilford | A rating |
| Zinc Consult Limited | Leeds | A rating |
| Zinc Network Limited | London | A rating |
| Zinc RE UK LIMITED | London | A rating |
| Zinc Ventures Limited | London | A rating |
| Zinc Work Limited | London | A rating |
| ZINCHI Technical Services Ltd | Meadowfield | A rating |
| Zindiya Moseley Ltd | Birmingham | A rating |
| ZINE CONSULTANCY AND EDITORIAL SERVICES LTD | London | A rating |
| Zing Dev Limited | London | A rating |
| Zinga Financial Services Limited | Uxbridge | A rating |
| ZINNIA CARE LIMITED | Hemel Hempstead | A rating |
| Zinnov UK Private Limited | LONDON | A rating |
| Zinus EU Ltd | London | A rating |
| Zio Health Limited | London | A rating |
| ZIOFY LIMITED | Romford | A rating |
| Zion Baptist Church | Cambridge | A rating |
| Zion Capital Limited | LONDON | A rating |
| Zion Care Ltd | Gerrards Cross | A rating |
| Zion Christian Church | Wellingborough | A rating |
| ZION COMMUNITY CARE LIMITED | Neath | A rating |
| Zion Harvest Ministries | Milton Keynes | A rating |
| Zion Oil Ltd | Milton keynes | A rating |
| Zion Technology Ltd | Hickley | A rating |
| Zion Worl Food Limited | Oxfordshire | A rating |
| Zionhome Film Production Limited | Edinburgh | A rating |
| Zionix Technologies Ltd | London | A rating |
| ZIP WORLD LIMITED | Llanrwst | A rating |
| Zip-Clip Ltd | Powys | A rating |
| ZIPBAB LIMITED | London | A rating |
| Zipcube ltd | london | A rating |
| ZIPHOUSE LIMITED | Leigh-on-Sea | A rating |
| ZIPHQ (UK) LTD. (T/A Zip) | London | A rating |
| Zipig Limited | Warwick | A rating |
| Zipolite Limited | Long Crendon | A rating |
| Zipporah Ltd | Cardiff | A rating |
| ZIPPYS DAY NURSERY LIMITED | Greenwich | A rating |
| ZIPWAY EXPRESS LTD | Coventry | A rating |
| ZipZap Solutions Ltd | Sutton | A rating |
| Zirco Ltd. T/As Costcutter | Andover | A rating |
| Zircon Retail Ltd | Crowborough | A rating |
| Zircon Software Ltd | Trowbridge | A rating |
| Zircon Tech Ltd | Redditch | A rating |
| Zirojob Limited | Leigh | A rating |
| ZISCO SOLUTIONS LIMITED | Birmingham | A rating |
| Zishi Group Limited | Bromley | A rating |
| ZISZIS FOOD LIMITED | Hertford Heath | A rating |
| Zitex Ltd | Birmingham | A rating |
| Ziton Ltd | London | A rating |
| ZIV Automation UK Limited | Gateshead | A rating |
| ZIVELLA U.K. & IRELAND LTD | Watford | A rating |
| Ziyad Tech Ltd | London | A rating |
| Ziyun Ltd | Oxford | A rating |
| Ziztel Limited | Nottingham | A rating |
| ZK Accountants Limited | Romford | A rating |
| ZK ACCOUNTING SOLUTIONS LTD | Brierley Hill | A rating |
| ZK carpets Rochdale Ltd | Rochdale | A rating |
| ZK Convenience Ltd t/a Lifestyle Express | Glasgow | A rating |
| ZK Enterprise Limited | Manchester | A rating |
| ZK Stores Ltd | Manchester | A rating |
| ZK Tech Ltd | Belfast | A rating |
| Zk Trading Enterprises Ltd | London | A rating |
| ZKTECO UK LTD | BIRMINGHAM | A rating |
| ZL Notting Hill Limited | London | A rating |
| ZL SPORTS INFINITY LTD | Abingdon | A rating |
| ZLC 7 Dials Ltd | London | A rating |
| ZLC Energy Ltd | Liskeard | A rating |
| ZLC London Limited | London | A rating |
| ZM Brands Ltd t/a Oodles N'Oodles Coventry | Coventry | A rating |
| ZM ELECTRICIAN LTD | Cardiff, | A rating |
| ZM IT TECHNOLOGIES LTD | Harrow | A rating |
| ZMAJ I.T. SOLUTIONS LIMITED | Barking | A rating |
| Zmartly Ltd | London | A rating |
| Zmax CM Limited | Chelmsford | A rating |
| ZMS London Ltd | London | A rating |
| ZMZ MOTORS LTD | Feltham | A rating |
| ZMZM Spice Ltd | Blackburn | A rating |
| ZNB CONSTRUCTION LTD | Manchester | A rating |
| ZNC Care Ltd | Hainault | A rating |
| Znk Limited T/A Mughal Knight | Suffolk | A rating |
| Znor Group Ltd | Manchester | A rating |
| ZNOX TECHNOLOGIES LTD | BELFAST | A rating |
| ZNS GOLDSMITH LIMITED | London | A rating |
| Znz Pizza Ltd trading as the Fat Pizza | Altrincham | A rating |
| ZOA Energy Solutions Ltd | Romford | A rating |
| ZOAM Ltd | London | A rating |
| Zoblit Limited | Leicester | A rating |
| Zocalo Ltd | Headley | A rating |
| Zodiac Events Limited | London | A rating |
| Zodiac Maritime Limited | London | A rating |
| ZODS LTD | Huddersfield | A rating |
| Zoe Aflame Christian Church | WALLASEY | A rating |
| ZOE CHRISTIAN CENTRE | LONDON | A rating |
| Zoe Communications Limited | London | A rating |
| Zoe domcare limited | Cambuslang | A rating |
| Zoe Limited | London | A rating |
| Zoetis UK Limited | Leatherhead | A rating |
| Zog Global Ltd | Darlington | A rating |
| ZOHA 'S PIZZAS LTD | Rochdale | A rating |
| Zoha Logistics ltd | Reading | A rating |
| ZOHA LONDON LTD | London | A rating |
| Zohan Health Limited | Anstey | A rating |
| Zoho Corporation Limited (UK) | Milton Keynes | A rating |
| Zoilo Restaurants Limited | Sidcup | A rating |
| ZOJA TECHNOLOGIES LIMITED | Pudsey | A rating |
| ZOKRIT FOOD LTD T/a Eastern Pavilion Restaurant | Edinburgh | A rating |
| ZOLA LTD | KENT | A rating |
| ZOLL Medical UK Limited | Cheshire | A rating |
| Zomangel Limited | London | A rating |
| Zomato Drinks Limited T/A Mooboo Bubble Tea | Luton | A rating |
| Zona Creative Ltd. T/A SALT.TV | London | A rating |
| ZONE BEAUTY STUDIO (NORTHAMPTON) LTD | Northampton | A rating |
| Zone Capital Advisors Ltd | London | A rating |
| Zone Central @ SE18 | Greenwich | A rating |
| Zone central ltd | London | A rating |
| Zone Creations Ltd | London | A rating |
| Zone Management Leicester Limited | Leicester | A rating |
| Zone Networks Ltd | London | A rating |
| ZONE SCHOOL OF BUSINESS STUDIES LONDON LTD | London, England | A rating |
| ZONE WAY LTD | London | A rating |
| ZONE2ZONE BUILDING SERVICES LTD | Carshalton | A rating |
| ZoneMedia Management Ltd | London | A rating |
| ZONEofTECH LTD | Salford | A rating |
| ZONES (SHEFFIELD) LTD | Sheffield | A rating |
| Zones UK LTD | London | A rating |
| Zonic Corporation Ltd | Marlborough | A rating |
| ZONIC TECHNOLOGIES UK LTD | HAYES | A rating |
| Zoo Restaurants Ltd | Birmingham | A rating |
| Zoobiotic Limited T/A BioMonde | Bridgend | A rating |
| Zoocha Limited | Hertford | A rating |
| Zoological Society of London | London | A rating |
| Zoom Abroad Online Ltd | Hemel Hempstead | A rating |
| Zoom Cars Limited | Bristol | A rating |
| Zoom Catering Ltd | Ilford | A rating |
| Zoom Creative | Dudley | A rating |
| ZOOM DIGITAL PRINTERS LIMITED | BRIERLEY | A rating |
| ZOOM IN PRIVATE LTD | Camber | A rating |
| ZOOM MAINTENANCE LTD | Luton | A rating |
| ZoomInfo UK LTD | London | A rating |
| Zoomlion UK Ltd | Wythenshawe | A rating |
| Zoomo London Ltd | London | A rating |
| Zoonou Limited | Eastbourne | A rating |
| Zoop Services Ltd | London | A rating |
| ZOOP TRADING LTD | MANCHESTER | A rating |
| Zoopla Ltd | London | A rating |
| Zooplus Services Limited | Oxford | A rating |