| Yate Waste Management Limited | Bristol | 2007 |
| Yates Waste Management Ltd | Stalybridge | 2024 |
| YBG Associates Ltd | London | 2020 |
| YBM International Ltd | London | 2023 |
| Yellow Badger Ltd | Gravesend | 2018 |
| Yellow Box Waste Managment Ltd | Kettering | 2024 |
| Yellowdrop Ltd | Enfield | 2026 |
| Yeltna Services Ltd | Liverpool | 2021 |
| YES Demolition Limited | Holmfirth | 2018 |
| YES My Dear Waste Ltd | Nottingham | 2019 |
| YES Waste Limited | Holmfirth | 2007 |
| Yesofy Ltd | Darwen | 2022 |
| Yess Removals and Storage Limited | London | 2018 |
| Yester Energy Company Limited | Carlisle | 2017 |
| Yettington Residents Limited | Budleigh Salterton | 1997 |
| Yinuo First Limited | London | 2022 |
| Ymwav & Cleaning Ltd | Leeds | 2023 |
| Ynni Powys Ltd | Bridgend | 2025 |
| Yorjunk Ltd | Bury St. Edmunds | 2020 |
| York Transport and Waste Solutions Ltd | Fareham | 2025 |
| York Valves Limited | Beverley | 2012 |
| Yorkshire Aggregates Limited | Doncaster | 2010 |
| Yorkshire Clearance Services Ltd | Batley | 2026 |
| Yorkshire Commodities Limited | Sheffield | 2011 |
| Yorkshire Concrete & Grab Hire Ltd | Leeds | 2021 |
| Yorkshire Dales Reclamation Limited | Colne | 2025 |
| Yorkshire Eco Installers Limited | Bradford | 2016 |
| Yorkshire Groundwork & Landscaping Limited | Goole | 2025 |
| Yorkshire Metal Recycling Ltd | Kettering | 2016 |
| Yorkshire Metals & Waste Management Ltd | Tadcaster | 2025 |
| Yorkshire Plastic Limited | Norwich | 2021 |
| Yorkshire Septics Ltd | York | 2020 |
| Yorkshire Soils Restoration Ltd | Wilmslow | 2025 |
| Yorkshire Spring Mineral Water Company Limited | Derby | 1969 |
| Yorkshire Sweep Ltd | Leeds | 2025 |
| Yorkshire Waste & Recycling Ltd | Halifax | 2023 |
| Yorkshire Waste Oils Ltd | Sheffield | 2022 |
| Yorkshire Waste Removers Ltd | Leeds | 2024 |
| Yorkshire Waste Solutions Ltd | Bradford | 2020 |
| Yorkshire Water Services Limited | Bradford | 1989 |
| Yorkshire Water Softeners Ltd | Hartlepool | 2019 |
| Yorwaste Limited | Northallerton | 1991 |
| You'Re Dumped Waste Management Ltd | Brighton | 2025 |
| Youlgrave Waterworks Limited | Bakewell | 1996 |
| Young Drains Ltd | Faringdon | 2023 |
| Young Excavator Services Limited | Lisburn | 1997 |
| Youngs Liquid Waste Limited | Leighton Buzzard | 2022 |
| Youngs Waste Clearance Ltd | Epsom | 2020 |
| Youngs Waste Management Limited | Linwood | 2023 |
| Your Drainage Solutions Limited | Poole | 2020 |
| Your Local Recycling Ltd | Pontefract | 2025 |
| Your Local Skip Ltd | Oswaldtwistle | 2026 |
| Your Safe Solutions Ltd. | Crawley | 2008 |
| Yourgardener&Landscaper Ltd | London | 2022 |
| YU Water Limited | Nottingham | 2015 |
| Yuli Studio Ltd | London | 2026 |
| YZ Construction Ltd | Enfield | 2026 |
| Z & M Goldie Ltd | Stanford-Le-Hope | 2025 |
| Z K Recycling Ltd | Stoke-On-Trent | 2024 |
| Z&G Catalytic Converters Ltd | Stoke-On-Trent | 2015 |
| Z. P. Drainage Ltd | Cardiff | 2023 |
| Zago Recycling Limited | Frodsham | 2023 |
| ZAK & Shak Waste Management Limited | Bradford | 2026 |
| ZAK Waste Solution Ltd | Birmingham | 2025 |
| Zaks Recycling Services Limited | Bradford | 2021 |
| ZAP Waste Systems Limited | Fishers Pond | 2018 |
| Zara London Ltd | Hatfield | 2017 |
| Zarras Logistics & Trading Ltd | Ottershaw | 2026 |
| Zazay Recycling Ltd | Hayes | 2021 |
| ZC Grab Hire Ltd | Chobham | 2018 |
| Zebas Services Ltd | Craigavon | 2023 |
| Zebra a Limited | Ottery St Mary | 2021 |
| ZEN123 Limited | Ilkeston | 2025 |
| ZEN456 Limited | Ilkeston | 2025 |
| Zenith Supplies Ltd | Bradford | 2025 |
| Zenrecycling Ltd | Bristol | 2026 |
| Zero Aqua Point Limited | Peterborough | 2026 |
| Zero Junk Zone Ltd | London | 2025 |
| Zero Lift Tippers Limited | Cheshire | 2015 |
| Zero Maintenance Group Ltd | Crawley | 2024 |
| Zero Trace Asbestos Solutions Ltd | Bishops Stortford | 2025 |
| Zero Waste Group Limited | Winchester | 2019 |
| Zero Waste in a Box Limited | Shrewsbury | 2011 |
| Zero Waste Left Botswana Ltd | Colne | 2026 |
| Zero Waste North East Limited | Newcastle Upon Tyne | 2026 |
| Zerobottle Ltd | London | 2025 |
| Zeronet Services (UK) Limited | Cardiff | 2015 |
| Zest Cleantech Ltd | London | 2017 |
| Zeus Export Limited | Holmfirth | 2012 |
| Zeus Global Ltd | Preston | 2024 |
| Zeus Recycling (Glass) Ltd | Mirfield | 2024 |
| Zeus Recycling Ltd | Mirfield | 2015 |
| Zhenzhi (UK) International Trading Co., Limited | Beckenham | 2023 |
| Zirs Waste Management Ltd | London | 2025 |
| ZM Skips Ltd | Greenford | 2022 |
| ZMM Removals and Logistics 04 Ltd | London | 2025 |
| ZNS Waste Management Ltd | Manchester | 2026 |
| ZOI Environmental Technologies Limited | Warwick | 2021 |
| Zorbatek Limited | Nottingham | 2022 |
| ZR IND Limited | Leeds | 2023 |