| Denco Waste Solutions Limited | Stockton-On-Tees | 2025 |
| Dencon Ltd | Harrogate | 2018 |
| Denfind Stone Limited | Forfar | 2004 |
| Dengie Waste Management Limited | Maldon | 2022 |
| Denham Hollybush Investment Ltd. | London | 2019 |
| Denice Mastersons International Limited | Walsall | 2007 |
| Dennis Waste OIL Collection Limited | Chesterfield | 2019 |
| Dennison (INT) Petro Chemicals Limited | Manchester | 2019 |
| Dennison's Limited | Arlesey | 2014 |
| Dental Waste Services Limited | Chelmsford | 2018 |
| Denton Metals Ltd | Wisbech | 2012 |
| Denton Skip Hire Limited | Cambridge, | 2019 |
| Denviro Enviromental Services Ltd | Manchester | 2024 |
| Den’S Rescue Recovery Ltd | London | 2025 |
| Depa Water Ltd | Mowhan | 2008 |
| Dependaflow Limited | Wickford | 2025 |
| Depothire Limited | Tweedmouth | 1986 |
| Derby Aggregates and Recycling Limited | Belper | 2018 |
| Derby Crushing and Screening Ltd | Belper | 2010 |
| Derby Scrapstore Ltd | | 1992 |
| Derby Waste Removal Ltd | Derby | 2019 |
| Derbyco Project SPV Limited | Matlock | 2019 |
| Derbyshire Asbestos Control Ltd | Chesterfield | 2022 |
| Derbyshire Commercial Bodybuilders Limited | Oadby | 1990 |
| Derbyshire Recycling Services Limited | Chesterfield | 2018 |
| Derbyshire Waste Limited | Doncaster | 1991 |
| Derek Leftly & Co. Ltd. | Romford | 1996 |
| Derived Power Ltd | Leeds | 2019 |
| Dermavival Limited | Long Eaton | 2020 |
| Derwen Recycling Limited | Neath | 2013 |
| Derwent Recycling Services Limited | Doncaster | 2006 |
| Derwent Waste Management Limited | Derby | 2005 |
| DES Environmental Services Limited | Redditch | 2013 |
| Des-Daita Services Group Limited | Chelmsford | 2018 |
| Desaine International Limited | Bromsgrove | 2017 |
| Desarn Holding Ltd | London | 2020 |
| Desert Bloom Enterprises Ltd | Egham | 2024 |
| Deshforce Demolition Limited | Southall | 2025 |
| Desi Toilets Hire Ltd | Hayes | 2019 |
| Designers Choice Upholstery Limited | Warwickshire | 1984 |
| Desilt & Drainage Solutions Ltd | Clacton-On-Sea | 2023 |
| Dessna Company Limited | Cirencester | 1997 |
| Destination Organised Limited | Braunton | 2025 |
| Destruct South Limited | Hose | 2026 |
| Deveron Water Solutions Limited | Glasgow | 2011 |
| Devon Contract Waste Ltd | Maidenhead | 1997 |
| Devon Disposals Limited | Plymouth | 2025 |
| Devon Eco Pallets Limited | Torquay | 2021 |
| Devon Space and Time Removals Ltd | Paignton | 2021 |
| Devon Waste Management Limited | Exeter | 2014 |
| Devonshire Concepts Limited | Manchester | 2024 |
| Devonshire Gold Ltd | Bury | 2024 |
| Devotee Technologies Limited | Birmingham | 2021 |
| Dexreco Limited | Gillingham | 2007 |
| Dexsum Plumbing Services Ltd | Manchester | 2017 |
| Dexter Plant Ltd | Liverpool | 2017 |
| DF Waste Collections Ltd | Southampton | 2026 |
| DFC Solutions Ltd | Blackheath | 2024 |
| DFD Plant Ltd | Sutton-In-Ashfield | 2019 |
| DFJ Grab Hire Ltd | Alloa | 2021 |
| DG Drain Care Ltd | London | 2021 |
| DG Holdings Scotland Ltd | Uddingston | 2020 |
| DG Plant Limited | Witney | 2026 |
| DG Well Limited | Dumfries | 2019 |
| DGK Solutions Ltd | Elm Park | 2024 |
| DGP Contracting Limited | Chelmsford | 2013 |
| DH Aggregates Ltd | Gainsborough | 2026 |
| DH Commodities Ltd | Lincoln | 2022 |
| DH Drainage Power Ltd | Isleworth | 2026 |
| DHC Utilities Limited | Wilmslow | 2018 |
| Dial a BIN Limited | Banbury | 2014 |
| Dial a JET Drainage Ltd | Southend On Sea | 2020 |
| Dial a ROD Engineering Services Limited | Carisbrooke | 2003 |
| Dial a Waste Rubbish Removals Ltd | Leeds | 2024 |
| Dial for Disposal Ltd | Newhaven | 2025 |
| Dialysis Box Collectors Limited | London | 2024 |
| Diamond Drainage (Scotland) Limited | Aberdeen | 2015 |
| Diamond Drains Ltd | Barnes | 2015 |
| Diamond Grab Hire Limited | Tadworth | 2015 |
| Diamond H20 Compliance Ltd | Oxford | 2023 |
| Diamond Hygiene Limited | Canterbury | 2006 |
| Diamond Metals Limited | Dorchester | 2013 |
| Diamond Recycling Ltd | Oldham | 2020 |
| Diamond Waste OIL Limited | Enfield | 2024 |
| Dias & Samy Ltd | Cardiff | 2018 |
| Diaspora Plus Services Limited | London | 2019 |
| Diban Recycle Ltd | Hitchin | 2019 |
| Dickens Group South Ltd | Rochester | 2026 |
| Dickinson Environmental Ltd | Rochdale | 2005 |
| Dicol Effluent Limited | Egham | 2005 |
| Different Initiatives for Saving Hope (Dish GB) | London | 2019 |
| Digaway & Clearaway Recycling Ltd | Worcester | 2014 |
| Digaway Recycling Ltd | Worcester | 2014 |
| Digest UK Limited | North Walsham | 2009 |
| Digester Ltd | Stourbridge | 2024 |
| Digger Crush Ltd | Sheffield | 2023 |
| Digi Cycle Solutions Limited | Derby | 2026 |
| Digital Resources Limited | Exeter | 2019 |
| Digital Transport Ltd | Ilford | 2025 |
| Digital Waste Collection Limited | Epsom | 2026 |