| Greencore Waste Management Ltd | London | 2024 |
| Greencroft Plastics Limited | Great Yarmouth | 1998 |
| Greencrop Limited | Kingsbridge | 1996 |
| Greencyc International Ltd | Birmingham | 2008 |
| Greencycle Innovations Ltd | London | 2024 |
| Greencycle Recycling Limited | Hungerford | 2023 |
| Greencycle Tech UK Ltd | Twickenham | 2025 |
| Greendell Limited | Dartford | 2008 |
| Greenedge Systems Ltd | Sutton Coldfield | 2020 |
| Greener Composting Limited | Lichfield | 2012 |
| Greener Ealing Ltd | London | 2019 |
| Greener Industrial Solutions Limited | Woodbridge | 2009 |
| Greener Nature Ltd | Basildon | 2018 |
| Greener Security Shredding Limited | Derby | 2010 |
| Greener Than Green Recycling Limited | Rochester | 2013 |
| Greener UK Recycling Ltd | Chelmsford | 2021 |
| Greener Waste (Cambridgeshire) Ltd | Maldon | 2025 |
| Greener Waste (Essex) Ltd | Maldon | 2025 |
| Greener Waste (Norfolk) Ltd | Maldon | 2025 |
| Greener Waste (Suffolk) Ltd | Maldon | 2025 |
| Greener Waste Solutions Ltd | Ipswich | 2022 |
| Greener Waste Technology Limited | Bradford | 2013 |
| Greener World London Limited | Slough | 2019 |
| Greener World Recycling Ltd | Langley | 2012 |
| Greenerleaf Estate Maintenance Ltd. | Coatbridge | 2010 |
| Greenfield Land Management Limited | Salisbury | 2011 |
| Greenfield Removals (Durham) Limited | Chorley | 2022 |
| Greenfield Removals Limited | Chorley | 2016 |
| Greenfield Technical Services Limited | Heathfield | 2003 |
| Greenfield Waste Management Limited | Bristol | 2007 |
| Greenforge Environmental Services Ltd | Durham | 2025 |
| Greenfuel (UK) Limited | Chesterfield | 1998 |
| Greengate Spring Limited | Keighley | 2010 |
| Greengaurd Waste Solutions Ltd | London | 2026 |
| Greengenic Ltd | Batley | 2018 |
| Greenhalgh Removals Ltd | Chorley | 2018 |
| Greenhill Sewer Services Ltd | Motherwell | 2024 |
| Greenlife Waste Limited | Slough | 2026 |
| Greenlight Cartridge Recycling | London | 2012 |
| Greenline Management Ltd | Dorking | 2026 |
| Greenline Recovery Ltd | London | 2019 |
| Greenline Waste Management Ltd | Leicester | 2026 |
| Greenline Water Treatment Services Limited | Nottingham | 2021 |
| Greenline(Environmental) Ltd. | Harlow | 2011 |
| Greenlink Networks Ltd | Milton Keynes | 2025 |
| Greenloc Environmental Services Limited | Homsey | 1997 |
| Greenoak Solutions Ltd | London | 2015 |
| Greenpath Waste Management Limited | London | 2024 |
| Greenpeak Environmental Ltd | Mansfield | 2025 |
| Greenrod Limited | Waltham Abbey | 2011 |
| Greenroute Clearance Ltd | Bradford | 2026 |
| Greens H2O Hire Holdings Ltd | Cardiff | 2020 |
| Greens H2O Ltd | Tadley | 2021 |
| Greens H2O Road Tanker Hire Ltd | Cardiff | 2020 |
| Greens Recycling (Wales) Limited | Caerphilly | 2013 |
| Greens Services & Recycling Ltd | Halifax | 2026 |
| Greens Waste (UK) Ltd | Portsmouth | 2014 |
| Greensands Management Services Ltd | Eastleigh | 2025 |
| Greenscape (Yorkshire) Limited | Goole | 2008 |
| Greenshire Recycling Ltd | Leeds | 2022 |
| Greenshires Environmental Services Ltd | Stourbridge | 2019 |
| Greenshoot Limited | Gerrards Cross | 2009 |
| Greenskill Environmental Technology Limited | Edinburgh | 2021 |
| Greensman Limited | York | 2002 |
| Greenspot Garden Waste Limited | Liskeard | 2024 |
| Greenstar Plastics UK Ltd | Northampton | 2025 |
| Greenstone Haulage Ltd | Stevenage | 2025 |
| Greenstream Flooring CIC | Cardiff | 2008 |
| Greensure Environmental Limited | Uxbridge | 2017 |
| Greenswood Limited | Birmingham | 2016 |
| Greentec Auto Limited | Manchester | 2025 |
| Greentech FM Ltd | Waltham Abbey | 2023 |
| Greentech for Integrated Solutions Ltd | London | 2020 |
| Greentech Plastics (UK) Limited | Southampto | 2019 |
| Greentech Waste to Energy Limited | Beaconsfield | 2023 |
| Greentora Solutions Ltd | Woking | 2025 |
| Greenvant Ltd | Darwen | 2026 |
| Greenview Waste Management Limited | Melton Mowbray | 2024 |
| Greenwaste (NW) Ltd | Knutsford | 2021 |
| Greenway (Ireland) Limited | Armagh | 2000 |
| Greenway Drainage Ltd | Bournemouth | 2026 |
| Greenway Environmental Limited | Romsey | 1947 |
| Greenways Processing Ltd | Blackburn | 2022 |
| Greenways Recycling Limited | Bury St Edmunds | 1995 |
| Greenwood Trading Limited | Leeds | 2012 |
| Greenwood Waste Brokers Ltd | Cowbridge | 2025 |
| Greenwood Waste Management Limited | London | 2009 |
| Greenworld Sales Limited | North Lynn Kings Lynn | 2004 |
| Greg Waste Limited | Mildenhall | 2024 |
| Grege Industrial 1 Ltd | Aberdeen | 2025 |
| Gregory Coles Cleansing Services Limited | Taunton | 2012 |
| Gregory J Smith Limited | Andover | 2007 |
| Gregson & SON Limited | Near Shipley | 1989 |
| Grenadier Drainage Ltd | Buckinghamshire | 2019 |
| Grendon Recycling Services Limited | Atherston | 2025 |
| Grey FOX Recycling Eco Ltd | Alton | 2024 |
| Grey FOX Recycling Ltd | Stanmore | 2020 |
| Greybridge Services Ltd | London | 2025 |
| Greyseeds Aqua Ltd | Swanage | 2025 |
| GRG Property Holdings UK Limited | Romsey | 2019 |