| Nationwide Recycling Services (UK) Ltd | Milton Keynes | 2013 |
| Nationwide Services Group Limited | Telford | 2001 |
| Nationwide Tyre Disposals Limited | Middlesbrough | 2017 |
| Nationwide Waste & Recycling Limited | Epsom | 2008 |
| Nationwide Waste Oils Limited | Crewe | 2025 |
| Nationwide Waste Services Limited | Oswestry | 2007 |
| Nationwide Waste Solutions Limited | Pontypool | 2013 |
| Nationwide Water Systems Ltd | Bury St. Edmunds | 2023 |
| Nationwide Watercare Limited | Burntwood | 2013 |
| Natural Synergies Limited | Darlington | 2012 |
| Natural UK Ltd | Ammanford | 2003 |
| Natural Waste Water Solutions Ltd | Coventry | 2010 |
| Natural Water Limited | Salisbury | 2019 |
| Natural Wood Recycling Limited | Bournemouth | 2017 |
| Natural World Products Limited | Dunmurry | 1989 |
| Nature GEN Limited | Rochdale | 2009 |
| Naturecore Compost Ltd | London | 2024 |
| Natures Way Pest Control Ltd | Wickford | 2019 |
| Natwaste Limited | Rugeley | 2014 |
| Naveau Service Ltd | Croydon | 2019 |
| Navitas Biomass Limited | Leamington Spa | 2014 |
| NB Waste Disposals Ltd | Chichester | 2024 |
| NB West Ltd | Sunderland | 2026 |
| NBA Environmental Ltd | Luton | 2025 |
| NBK Recycling UK Limited | Solihull | 2017 |
| NC and CC Services Limited | Stafford | 2009 |
| NC Metal Recycling Ltd | Caerphilly | 2013 |
| NCM Recycling and Waste Solutions Limited | Pudsey | 2022 |
| NCM Support Services Ltd | Birmingham | 2020 |
| NCS Utilities Limited | Glasgow | 2015 |
| ND Collection Ltd | Bradford | 2016 |
| ND Williams Holdings Limited | Bromborough | 2017 |
| NDA Recycling Limited | Alcester | 2009 |
| NDK Skips Ltd | London | 2026 |
| NDR Grab Hire Limited | Wolverhampton | 2019 |
| NDS Materials Ltd | Thirsk | 2026 |
| NE Automotive Assist Ltd | Sunderland | 2026 |
| NE Commercial MRF Ltd | Sheffield | 2025 |
| NE Commerical MRF Ltd | Amersham | 2025 |
| NE Drain Services Ltd | Hartlepool | 2026 |
| NE Wasteaway Ltd | Gateshead | 2019 |
| Neal Environmental Ltd. | Cardiff | 1997 |
| Neal Remediation Ltd | Cardiff | 2006 |
| Neal Soil Suppliers Ltd. | Cardiff | 1997 |
| Neales Waste Management Limited | Rugby | 1991 |
| Near Grab Ltd | Wigston | 2025 |
| Nearest Ltd | London | 2011 |
| Neath Port Talbot (Recycling) Limited | Swansea | 1998 |
| Neath Port Talbot Waste Management Co. Ltd. | Swansea | 1991 |
| Nectar Metals Ltd | Todmorden | 2026 |
| NEE Limited | Southport | 2007 |
| Need a Skip Recycling Limited | Birmingham | 2019 |
| Need the LOO Hire Limited | Rugby | 2018 |
| Neepsend Recycling Limited | Sheffield | 2015 |
| Negao Removals UK Ltd | Slough | 2025 |
| Negosyo Ltd | Kington | 2018 |
| Neighbourhood Investment in Community Enterprises (Nice) | Bolton | 2012 |
| Neil Johnson Water Limited | Wigan | 2017 |
| Neil Leslie Gilbert Williams Jacksnephew Enterprises Limited | London Borough Of Croydon | 2010 |
| Neil Roch Limited | Banes | 2003 |
| Neil Williams Haulage Limited | Dalkeith | 2012 |
| Nelson Brothers Ltd | Andover | 2014 |
| Nelson Metal and Waste Ltd | London | 2020 |
| Nelson Recycling Ltd | Andover | 2010 |
| Nelson Stanley Limited | Poole | 1976 |
| Nemesis OIL Ltd | London | 2025 |
| NEO Auto Limited | Wolverhampton | 2004 |
| Neoplas Recyclers Ltd | Maidenhead | 2024 |
| Neowall Systems Limited | London | 2024 |
| Neowater Ltd | London | 2025 |
| Neozic UK Ltd | London | 2025 |
| Nepr Group Ltd | Jarrow | 2024 |
| Nepti - Waste Disposal Ltd | Dunstable | 2019 |
| Neptune Car Spares Ltd | Birkenhead | 2006 |
| Neptune Compliance Ltd | Tamworth | 2021 |
| NES Consultants Limited | Sheffield | 2014 |
| NES Recycling Limited | Atherstone | 2007 |
| Neslaetagiv Ltd | London | 2025 |
| Nessie Limited | Glasgow | 2006 |
| Nest Road Developments Limited | Gateshead | 2015 |
| NET Beauty Limited | Purley | 2026 |
| NET Zero IT Recycling Ltd | London | 2024 |
| NET Zero North Sea Storage Limited | Sunbury On Thames | 2020 |
| NET Zero Resources Ltd | London | 2020 |
| NET Zero Waste Solutions Limited | Lincoln | 2020 |
| Netherfield Pump Station Ltd | Nottingham | 2019 |
| Nettec Environmental Services Ltd | Bristol | 2009 |
| Network 2 Supplies Limited | Bury St Edmunds | 2002 |
| Network Plus Multi Utility Limited | Manchester | 2020 |
| Network Properties Ltd | London | 2021 |
| Neutraclean Limited | Luton | 2025 |
| Neutral Energy Vectors Ltd | London | 2022 |
| Nev's Grab Hire Limited | Wellingborough | 2016 |
| Neverlate Removals Ltd | Leeds | 2024 |
| Neville Tucker Services Limited | Hull | 2010 |
| Nevis Resources Limited | Bishop Auckland | 2014 |
| New Acres Limited | Haywards Heath | 1991 |
| New Day Recycling Ltd | Stoke Prior | 2012 |
| New ERA Assets Limited | Sawbridgeworth | 2012 |
| New ERA Metals Ltd | Sawbridgeworth | 2022 |