| GRG Waste UK Ltd | Romsey | 2019 |
| Griffin Stringer (Corby) Limited | Leicester | 2007 |
| Griffin Stringer Ltd | Leicester | 1979 |
| Griffin Toilet Hire Limited | Nr Axebridge | 2013 |
| Griffin Water & Energy Ltd | Malmesbury | 2019 |
| Griffiths Molloy Ltd | Cardiff | 2016 |
| Griffiths Waste Management Ltd | Swansea | 2010 |
| Griffiths Waste Removals Ltd | Houghton Le Spring | 2024 |
| Griffiths Waste Solutions (GWS) Limited | Haverfordwest | 2014 |
| Grille, Diffuser & Louvre Co. Limited(The) | Manchester | 1980 |
| Grimsby Car Salvage Ltd | Grimsby | 2023 |
| Grimsby E-Waste Solutions Ltd | Grimsby | 2024 |
| Grimsby Granulation Limited | Grimsby | 2017 |
| Grinsells Skip Hire Limited | Walsall | 1990 |
| Grinsells Waste Management Limited | Walsall | 2019 |
| Grist Environmental Limited | Devizes | 1993 |
| GRM Clearance Ltd | Benfleet | 2026 |
| GRM Skip Hire Limited | Stourbridge | 2023 |
| Grogan Environmental Services Ltd | Dungannon | 2015 |
| Grosvenor Asbestos Solutions Ltd | Sale | 2020 |
| Ground & Civils Ltd | Denbigh | 2017 |
| Ground Drainage Ltd | Bournemouth | 2025 |
| Ground Floor | Hebden Bridge | 1984 |
| Ground Floor UP Ltd | Kingston Upon Thames | 2013 |
| Ground Flow Ltd | Amesbury | 2019 |
| Ground Haulage Limited | Manchester | 2023 |
| Ground Integrity Limited | Wakefield | 2019 |
| Ground Remediation Ltd | Chertsey | 2024 |
| Ground Services (NI) Ltd | Bangor | 2016 |
| Ground Waste Recycling Ltd | Welwyn Garden City | 1986 |
| Grounded Environmental Ltd | Taunton | 2026 |
| Groundscape Environmental Limited | Southampton | 2016 |
| Groundwater Dynamics Ltd | Leamington Spa | 2012 |
| Groundwater Limited | Halifax | 1991 |
| Groundwater Solutions Ltd | Shrewsbury | 2013 |
| Group 58 Limited | Ormskirk | 2024 |
| Group A1 Limited | Billericay | 2025 |
| Group for Recycling in Argyll and Bute Trust Limited | Lochgilphead | 1999 |
| Group Services (North West) Ltd | Ellesmere Port | 2019 |
| Growback Manchester Limited | Ashton-Under-Lyne | 2025 |
| Growing Beds Recycling Services Limited | Bedford | 2005 |
| Growmoor Recycling Ltd | Dungannon | 2012 |
| Groww Green CIC | Doncaster | 2023 |
| Groww Green Social Enterprise Limited | Doncaster | 2023 |
| GRP Pipeline Solutions Ltd | London | 2026 |
| GRS Integrated Solutions Holdings Limited | Nuneaton | 2013 |
| GRT Drainage Limited | Southport | 2019 |
| Gruber Services Limited | London | 2019 |
| Grumpy MAN and Van Ltd | Cambridge | 2026 |
| Grundfos Water Treatment UK Ltd. | Bromley | 2014 |
| Grundig UK Limited | London | 1993 |
| Grundon Waste Management Limited | Wallingford | 2001 |
| Grundy & Co. Excavations Limited | Widnes | 1988 |
| GS Clearance Ltd | Hove | 2024 |
| GS Removal Service Ltd | London | 2021 |
| GS Skip Hire (NE) Ltd | Prudhoe | 2019 |
| GS Waste Removal Services and Maintenance Ltd | Birmingham | 2021 |
| GSB Drainage Ltd | Southampton | 2025 |
| GSD Clearances Limited | Guildford | 2024 |
| GSE Skips (Recycling) Limited | Purley | 2011 |
| GSH Waste Recycling Ltd | Widnes | 2007 |
| GSL Trading Services Ltd. | Birmingham | 2016 |
| Gsph Ltd | Caernarfon | 2024 |
| GT Film Waste Limited | Maidstone | 2024 |
| GT Waste Disposal Ltd | Houghton Le Spring | 2026 |
| GTO Enterprises Ltd | Liverpool | 2025 |
| GTP Waste Ltd | Brecon | 2014 |
| GTR Metal & Waste Recycling Limited | Erith | 2026 |
| GTS Recycling Ltd | Sale | 2023 |
| Guaide Ltd | Nottingham | 2023 |
| Guardian Decommissioning Limited | Aberdeen | 2026 |
| Guardian Mould Experts Ltd | London | 2016 |
| Guerrilla Technologies Ltd | London | 2023 |
| Guest Business Solutions Limited | Newton Abbot | 2025 |
| Gulf Plastics Limited | Bolton | 2014 |
| Gully Waste Services Limited | Lingfield | 2026 |
| Gullyguys Ltd | Uxbridge | 2022 |
| GUM Blitzer Ltd | Swansea | 2012 |
| Gumbley Investment Group Ltd | Chorley | 2025 |
| Gunnergate Limited | Middlesbrough | 2012 |
| Gunness Pump Services Limited | Scunthorpe | 2016 |
| Gupc Ltd | Penicuik | 2024 |
| Guri Garden Services Ltd | London | 2021 |
| Gurkha Movers Ltd | Winchester | 2023 |
| Gurteen Recycling Limited | Newcastle Upon Tyne | 2012 |
| Gutter Cleaning & Drainage Solutions Ltd | London Colney | 2023 |
| Guttermuck Ltd | Harrogate | 2025 |
| GVG Transport Ltd | Gravesend | 2021 |
| GW Clearances Ltd | Warrington | 2022 |
| Gwaste Ltd | Swindon | 2022 |
| Gwastraff Cymru Limited | Gwynedd | 2007 |
| Gwclogisticsltd Ltd | Bootle | 2025 |
| Gwella Contracting Services Ltd | Redruth | 2020 |
| Gwendraeth Valley Recycling Limited | Carmarthen | 2009 |
| Gwent Enviro Waste Ltd | Newport | 2024 |
| GWG Waste Care Solutions UK Ltd | Chipping Norton | 2013 |
| Gwilliam Recycling Limited | Scarborough | 2023 |
| GWR (Agricultural) Limited | Bristol | 2016 |
| GWR BIN Rentals Ltd | Houghton Le Spring | 2026 |
| GWR Group Holdings Limited | Bristol | 2024 |