| Zen Arts Limited | London | A rating |
| Zen City & Sakura Limited | Southend On Sea | A rating |
| Zen Constructions & Maintenance Limited | London | A rating |
| ZEN CONSULTANTS (SCOTLAND) LTD | Edinburgh | A rating |
| ZEN CSR LTD | High Wycombe | A rating |
| Zen Dental | Banstead | A rating |
| Zen Educate Limited | London | A rating |
| Zen Garden (Leatherhead) Ltd. | Leatherhead | A rating |
| Zen Internet Limited | Rochdale | A rating |
| ZEN JAPANESE RESTAURANT | BELFAST | A rating |
| Zen Lifestyle | Edinburgh | A rating |
| Zen Mondo Ltd | London | A rating |
| ZEN PERSONNEL LIMITED | London | A rating |
| Zen Risk Limited T/A Dynarisk | London | A rating |
| ZEN SECURITIES LIMITED | Hayes | A rating |
| Zen Shots Ltd | Milton Keynes | A rating |
| ZEN TRAVELS WEST MIDLANDS LIMITED | Walsall | A rating |
| Zen uk Ltd | Durham | A rating |
| ZEN-NOH | London | A rating |
| ZEN-SHAY UK LTD | Liverpool | A rating |
| ZEN-X TECHNOLOGY LIMITED | London | A rating |
| Zenco | Leicester | A rating |
| ZENCONTROL LIMITED | STAFFORD | A rating |
| Zendesk UK Ltd | London | A rating |
| Zeneesha Ltd | Sunningdale | A rating |
| Zenen Textile Ltd | London | A rating |
| Zenex Plus Limited | London | A rating |
| Zenfinex Limited | London | A rating |
| Zengh Indian Cuisine Limited | Telford | A rating |
| Zenif Agency Ltd | Bedford | A rating |
| ZeniMax Europe Limited | London | A rating |
| Zenion Limited | London | A rating |
| ZENITH ACADEMY OF HEALTHCARE STUDIES LTD | London | A rating |
| Zenith Accounting And Business Solutions | London | A rating |
| Zenith AI (N.I) | Belfast | A rating |
| Zenith Audit Ltd | LONDON | A rating |
| Zenith Bank (UK) Limited | London | A rating |
| Zenith Black Ltd | Oxfordshire | A rating |
| ZENITH BUSINESS AND FINANCIAL SOLUTION LTD | Luton | A rating |
| Zenith Care Ltd T/A Mill Lodge Care Centre | BRADFORD | A rating |
| ZENITH CARE SOLUTIONS LIMITED | SLOUGH | A rating |
| ZENITH CARE SUPPORT SERVICES LTD | Manchester | A rating |
| zenith eco solutions | Liverpool | A rating |
| Zenith Energy Limited | Aberdeen | A rating |
| Zenith Fried Chicken | Croydon | A rating |
| ZENITH GRP LTD | London | A rating |
| ZENITH HALAL BUTCHERS LTD | THORNTON HEATH | A rating |
| ZENITH INTEGRITY CARE LIMITED | OXFORD | A rating |
| ZENITH LABS GROUP LTD | LEEDS | A rating |
| Zenith Lawyers LLP | Blackburn | A rating |
| ZENITH LEATHER LTD | Southall | A rating |
| Zenith Multi Academy Trust | Benfleet | A rating |
| ZENITH PROFESSIONALS LTD | Dagenham | A rating |
| Zenith Solicitor Ltd | SHEFFIELD | A rating |
| Zenith UK (Media) Limited | London | A rating |
| Zenithcare Resources Management Services Ltd T/A Zenithcare Recruitment | Dagenham | A rating |
| ZENITHGROUPUK | Bury | A rating |
| Zenithon AI Ltd | Axbridge | A rating |
| Zenithwave Capital Limited | Croydon | A rating |
| Zenium Technology Partners Limited | London | A rating |
| Zenko Consulting Ltd | Whickham | A rating |
| Zenkyoren Europe Limited | London | A rating |
| ZENLEADS INTERNATIONAL LIMITED (Trading as Apollo.io) | London | A rating |
| Zennar Limited | Saltash | A rating |
| Zennor Asset Management LLP | London | A rating |
| Zeno Communications (UK) Limited | London | A rating |
| Zeno Equity Partners LLP | London | A rating |
| Zenobe Energy Limited | London | A rating |
| Zenobia Sarl UK Ltd | Manchester | A rating |
| Zenos Interactive Limited | London | A rating |
| Zenoss UK Limited | Coventry | A rating |
| ZENOVA X LTD | Oxford | A rating |
| Zens Consultancy Ltd | London | A rating |
| Zensar Technologies (UK) Ltd | London | A rating |
| Zensho Foods UK LIMITED | London | A rating |
| Zental Surgeries Limited | London | A rating |
| Zentar Healthcare Limited | London | A rating |
| Zentiva Pharma UK Limited | Guildford | A rating |
| Zentron Creative Ltd | Manchester | A rating |
| Zenzero Solutions Ltd | Coventry | A rating |
| Zenzic Partners Limited | London | A rating |
| Zenzic-UK Ltd | London | A rating |
| Zenzie Tinker Conservation | Brighton | A rating |
| ZEOOLANS LIMITED | Manchester | A rating |
| Zeotap UK Limited | London | A rating |
| Zepbrook Ltd | London | A rating |
| Zephir Ltd | Malvern | A rating |
| ZEPHYR ACCOUNTING LIMITED | London | A rating |
| Zephyr Digital Consultancy Limited | London | A rating |
| Zephyr Technology Consulting Limited | London | A rating |
| Zepp Health UK Limited | Reading | A rating |
| Zeppelin Systems UK Ltd | Annesley | A rating |
| Zera Healthcare Ltd | Norwich | A rating |
| ZERAGO LTD | Colchester | A rating |
| ZERDALAB LIMITED | Aberdeen | A rating |
| Zereen Ltd. T/As Reksio | Worksop | A rating |
| ZEREN GROUP LTD | London | A rating |
| Zeren Search Ltd | London | A rating |
| Zero Carbon Capital Limited | Havant | A rating |
| Zero Carbon Emissions Ltd | Leicester | A rating |
| Zero Degrees Design LTD | London | A rating |
| ZERO DEGREES SYSTEMS LTD | Birmingham | A rating |
| ZERO FADES LTD | Carshalton | A rating |
| Zero Gravity Tech Ltd | London | A rating |
| zero height limited | London | A rating |
| Zero Imprint Limited | London | A rating |
| ZERO MILES LIMITED | Birmingham | A rating |
| Zero Petroleum Limited | London | A rating |
| Zero Point Motion Ltd | Bristol | A rating |
| Zero Proof International Limited | Rickmansworth | A rating |
| Zero Three Care Homes LLP | Feering | A rating |
| Zero Three Care Homes LLP | East Molesey | A rating |
| Zero Trace Procurement | London | A rating |
| Zero Trust Security Solutions | London | A rating |
| Zero Waste Scotland | Stirling | A rating |
| Zero21 Brands Limited | Manchester | A rating |
| Zero7 Restaurant and Bar | Hornchurch | A rating |
| ZeroAvia Ltd | Cirencester | A rating |
| Zerofox UK Ltd. | London | A rating |
| Zerogram Limited | Penge | A rating |
| Zerolatency UK Limited | Guildford | A rating |
| ZeroLight Limited | Newcastle | A rating |
| ZERONE EDUCATION&TRAINING LIMITED | London | A rating |
| ZEROONE INFOTECH LTD | SLOUGH | A rating |
| ZEROPA HOLDINGS LTD | London | A rating |
| zeroRISC Inc | London | A rating |
| Zerran LTD T/A Lavash | brighton | A rating |
| Zervudachi, Roberts and Macadam Ltd | LONDON | A rating |
| Zerya Elya Ltd | Poole | A rating |
| ZESHAN BARGAIN LTD | Manchester | A rating |
| Zespa Media Ltd | Plymouth | A rating |
| Zest Care Homes Limited | Yarm | A rating |
| ZEST LAUNDRY LTD | BOURNE END | A rating |
| Zest Route to Learning Ltd | Peterborough | A rating |
| Zestec Asset Management Ltd | London | A rating |
| Zestia Limited | Manchester | A rating |
| ZESTY BITES PIZZERIA AND DESSERTS LTD | MIDDLESBROUGH | A rating |
| Zesty Flavours Ltd | Wokingham | A rating |
| ZESTY VAPE PADDOCK LTD | Brighouse | A rating |
| ZET CARE SERVICES LTD | Wellingborough | A rating |
| ZETA (IOM) Limited | Southport | A rating |
| Zeta Analytical Ltd | Watford | A rating |
| Zeta Global Ltd | London | A rating |
| ZETA PIZZA COMPANY LTD t/a FIREAWAY CUMBERNAULD | Cumbernauld | A rating |
| Zeta Shipping UK Limited | Farnborough | A rating |
| ZETEK LTD | LONDON | A rating |
| Zeteopeople Ltd | Brighton | A rating |
| ZETESMED Ltd t/a BUTTERFLY Dental Practice | Oswestry | A rating |
| Zetica Ltd | Eynsham | A rating |
| Zetland Capital Partners LLP | London | A rating |
| ZETLAND MEDICAL PRACTICE | MARSKE BY THE SEA | A rating |
| Zetron Limited | Hull | A rating |
| Zetta Connect LTD | London | A rating |
| ZEUGMA KITCHEN LTD | LONDON | A rating |
| Zeurope International Limited | London | A rating |
| Zeus Brokers Limited | London | A rating |
| Zeus Cars Ltd | Bedford | A rating |
| Zeus Electrical Constructions Ltd | London | A rating |
| Zeus Labs Limited | London | A rating |
| Zeus Tech Solutions | Liverpool | A rating |
| Zeux LTD | London | A rating |
| ZEVER JEWELLERS | London | A rating |
| Zevero Ltd | London | A rating |
| ZEXOZ LTD t/a The Lovat Hotel | Scotland, | A rating |
| Zextons Limited | St.Helens | A rating |
| ZEY MEL LTD | LONDON | A rating |
| ZEYMOS PHARMA LTD | LONDON | A rating |
| ZEYTUN ABC LTD | London | A rating |
| ZEZ CONVENIENCE STORE LTD T/A Day Today | Hamilton | A rating |
| ZF Automotive UK Limited | Solihull | A rating |
| ZF Chassis Modules (Solihull) Limited | Solihull | A rating |
| ZF Lemforder UK Ltd | Wednesbury | A rating |
| ZF Services UK Limited | Nottingham | A rating |
| ZFA LTD | WOODFORD GREEN | A rating |
| ZFE Food Ltd | London | A rating |
| ZFH Group Ltd | Cheadle | A rating |
| ZFL Surveyors Ltd | Southend On Sea | A rating |
| ZG BUSINESS SERVICES LIMITED | Newcastle upon Tyne | A rating |
| ZG Lighting Limited | Spennymoor | A rating |
| ZGB LOGISTICS LTD | Middlesbrough | A rating |
| zgrp limited | Wimbledon | A rating |
| ZH ACCOUNTING LTD | Huddersfield | A rating |
| ZH FOODS LTD | Leeds | A rating |
| ZH Law Ltd | Leicester | A rating |
| ZH LONDON PROPERTIES LTD | London | A rating |
| ZH Transport Limited | High Wycombe | A rating |
| ZHA Architects Limited | London | A rating |
| ZHA786 LIMITED | LONDON | A rating |
| ZHANGJI ORIENTAL FOOD LIMITED | Oxford | A rating |
| ZHANGLIANG MALA TANG (UK) LIMITED | LONDON | A rating |
| Zhaxi Ltd | Bristol | A rating |
| ZHB Services Ltd | Hounslow | A rating |
| Zhero Limited | London | A rating |
| Zhestkov.Studio Limited | London | A rating |
| ZHI C LIMITED | Mitcham | A rating |
| ZHI CHENG TRADING LTD | London | A rating |
| Zhixiang Bespoke Culture Limited | London | A rating |
| ZHM LTD | Twickenham | A rating |
| Zhonglin Ltd | London | A rating |
| Zhongying Holding Group(London) Co. Limited | London | A rating |