| New ERA Scrap Ltd | Sawbridgeworth | 2014 |
| New Forest Metal Recycling Ltd | Southampton | 2017 |
| New Forest Solutions Ltd | Fordingbridge | 2010 |
| New Forest Waste & Recycling Limited | Lymington | 2019 |
| New Global Recycling Ltd | Wolverhampton | 2024 |
| New Green Plastics Limited | Cambridge | 2024 |
| New Horizon Plastics Co Ltd | Flint | 2019 |
| New House Lane Green Waste Centre Ltd | Essex | 2025 |
| New Lands (Scotland) Limited | Johnstone | 2025 |
| New Leaf Recycling Limited | London | 1990 |
| New Line Polymers Limited | Barnet | 2012 |
| New Look Waste Sustainable Services Ltd | Manchester | 2025 |
| New Plan Furniture Limited | | 1971 |
| New Reach Enterprises Limited | Bolton | 2003 |
| New Recyclers Ltd | London | 2018 |
| New Recycling Ltd | London | 2013 |
| New Star Environmental Limited | High Wycombe | 2010 |
| New Start Recycling CIC | Pontypool | 2025 |
| New Town Waste Solutions Limited | Motherwell | 2013 |
| New Uses Recycling Ltd | Manchester | 2020 |
| New Waste Management Ltd | London | 2024 |
| New Waste Solutions Ltd | Chesterfield | 2019 |
| New Water Supply Limited | London | 2025 |
| New Wave Marine Limited | Plymouth | 2014 |
| New Wave Recycling Ltd | Chelmsford | 2024 |
| New Way Recycling Ltd | Smethwick | 2025 |
| New West Gypsum Recycling (UK) Limited | Weston-Super-Mare | 2004 |
| New World Recycling Ltd | Camberley | 2023 |
| Newbery Recycling Limited | Exeter | 2014 |
| Newbiggin Limited | Manchester | 2025 |
| Newbold Energy Ltd | Warwickshire | 1956 |
| Newbourne Farm Composting Limited | Fordingbridge | 2013 |
| Newcastle Wood Recycling Community Interest Company | Newcastle Upon Tyne | 2013 |
| Newfoundlands Limited | Norfolk | 2004 |
| Newham Waste Ltd | London | 2022 |
| Newlife IT Ltd | Farnborough | 2016 |
| Newmans Metals Ltd | West Bromwich | 2010 |
| Newport and Hereford Drainage Limited | Tredegar | 2012 |
| Newport Recycling Limited | Newport | 1993 |
| Newry City Waste Ltd | Newry | 2019 |
| Newstarts | Bromsgrove | 2009 |
| Newton Bray Surfacing Limited | Worsley | 1987 |
| Newtral Waste Ltd | Manchester | 2014 |
| Newys Removals Ltd | Birmingham | 2025 |
| Nex-Gen Environmental Services Ltd | Rugby | 2017 |
| Nexgen Recycling Ltd | 94A Wycliffe Road | 2018 |
| Next Chapter Property Clearance Ltd | Worthing | 2026 |
| Next Door Property Clearances Ltd | Worcester Park | 2024 |
| Next Generation Recycling Ltd | Knowsley | 2019 |
| Next Life Materials Ltd | Greenford | 2025 |
| Next Step Clearance Ltd | East Molesey | 2025 |
| Next-Level Waste Management Sussex Ltd | Worthing | 2024 |
| Nextech Energy Ltd | London | 2024 |
| Nextgen IT & Recycling Ltd | Hull | 2025 |
| Nextgen Recycling Limited | Newport | 2025 |
| Nextloopp Ltd | London | 2018 |
| Nexus Community Services Limited | Newmarket | 2026 |
| Nexus Independent Waste Consultants Ltd | Bury St Edmunds | 2017 |
| Nexus Remet Solutions Ltd | Birmingham | 2025 |
| Nexus Repair UK Ltd | London | 2025 |
| Nexvoltis Ltd | Canterbury | 2026 |
| Nezaj Services Limited | Chatham | 2012 |
| NFR Events Ltd | Llandrindod Wells | 2018 |
| NG Haulage Ltd | Royston | 2021 |
| NG Waste Management Ltd | Lancaster | 2026 |
| NGT Waste Services Limited | West Sussex | 2005 |
| Nhmcl Limited | Rugby | 2008 |
| NI Water Clear Limited | Belfast | 2017 |
| Nicholas Mack Transport Services Ltd | London | 2022 |
| Nicholls & Pearce (Waste Paper) Limited | Sevenoaks | 1961 |
| Nicholls Limited | Ipswich | 2015 |
| Nick Brookes Group Limited | Nantwich | 2022 |
| Nick Brookes Recycling Limited | Green Lane Wardle Nr Nantwich | 2007 |
| Nick Ferris Skip Hire Limited | Penryn | 2001 |
| Nicks Waste Removal Services Limited | Romford | 2025 |
| Niddry Bing Limited | Edinburgh | 2002 |
| NIK Oils 99 Ltd | Enfield | 2022 |
| Nikinrn Limited | Waltham Cross | 2025 |
| Nikkord Limited | Edinburgh | 1983 |
| Nikmet Ltd | Barnsley | 2025 |
| Nik’S Waste Collection Ltd | Bracknell | 2023 |
| Nile Removals Ltd | Birmingham | 2025 |
| Nimbus UK Bidco Limited | London | 2022 |
| Nimtech | Bolton | 1986 |
| Niramax Group Limited | Preston Farm Business Park | 2001 |
| Niramax Rubber Products Limited | Hartlepool | 2016 |
| Nirbc Ltd | Ballymena | 2007 |
| Nissi Community CIC | Wolverhampton | 2026 |
| NIT Waste Management Ltd | Cardiff | 2018 |
| Nitra Clean Ltd | Basildon | 2021 |
| Nitrogen Digester Ltd | Stourbridge | 2025 |
| NJ Project Consultancy Limited | Swansea | 2018 |
| NJD Waste Management Ltd | Stockport | 2026 |
| NJM Metal Recycling Limited | Southampton | 2014 |
| NJM Waste Removal Ltd | Blaydon-On-Tyne | 2025 |
| NJS Waste Brokerage Limited | Stafford | 2022 |
| NK OIL Waste Solutions Ltd | London | 2025 |
| NLG Asbestos Solutions Ltd | St. Helens | 2024 |
| NM Grab & Tipper Ltd | Rochdale | 2022 |
| NM Metal Recycling Ltd | Barnsley | 2020 |