| D60 Skip Hire Ltd | Sutton Coldfield | 2022 |
| DA Baldwin and SON Limited | Dudley | 2024 |
| DAC Environmental & Demolition Limited | Heywood | 2019 |
| Dacarausow Ltd | London | 2025 |
| Dacco Limited | Benfleet | 2009 |
| Dafen Service Station Limited | Llanelli | 1979 |
| DAG Waste Removal Services Limited | Kidderminster | 2026 |
| Daiffe Ltd | Poole | 2025 |
| Daineswell Limited | Worsley | 2008 |
| Dainesy Group Limited | Worthing | 2024 |
| Dainesy Scaffolding Sales Limited | Worthing | 2026 |
| DAJ Removals and More Ltd | Bath | 2024 |
| Dakro Air & Water Limited | Leicester | 2023 |
| Dalesworth Consultants Ltd | Bingley | 2016 |
| Dalex Team Ltd | London | 2017 |
| Dallaghill Ltd | Liverpool | 2017 |
| Dalriada Water Limited | Crumlin | 2004 |
| Dalrod (UK) Limited | Cambridgeshire | 1996 |
| Dalton Demolition Recycling Limited | Edinburgh | 2006 |
| Dalton Group Limited | Broxburn | 1984 |
| Dalton NW Limited | Skelmersdale | 2022 |
| Daly Drainage Ltd | London | 2023 |
| Daly Drains Ltd | Manchester | 2008 |
| Daly Plant Hire Ltd. | London | 2001 |
| Daly Plastics Limited | Bolton | 2010 |
| Dame Hygiene Services Ltd | Northwich | 2004 |
| Damian Sweeps Services Limited | Solihull | 2013 |
| Damm Environmental Holdings Limited | Glasgow | 2015 |
| Damm Environmental Limited | Glasgow | 2001 |
| Damp & Mould Solutions UK Limited | London | 2025 |
| Damp Busters & Building Contractors Ltd | Lincoln | 2025 |
| Damp Domestics Limited | South Norwood | 2016 |
| Damside Recover & Reuse Ltd | Falkirk | 2025 |
| Damside Soil & Stone Ltd | Falkirk | 2025 |
| Damside Wood & Plastics Ltd | Falkirk | 2025 |
| DAN the Van MAN Ltd. | Coatbridge | 2025 |
| Dana Commercial Clean Ltd | Birmingham | 2025 |
| Dana Export Ltd. | Polegate | 2009 |
| Dangerous Substance Control Limited | Stoke On Trent | 2011 |
| Daniel Ford Maintenance Ltd | London | 2014 |
| Daniel James Construction Services Limited | Bracknell | 2019 |
| Daniel Palmer Drainage Ltd | Stockbridge | 2021 |
| Danny and Nick Services Ltd | London | 2026 |
| Danny Elders Export Limited | London | 2007 |
| Danny Wade Plant Hire Ltd | Co Derry | 1996 |
| Dannys Disposal Ltd | Welwyn Garden City | 2025 |
| Dans Waste Removal & Skip Hire Limited | Kingsbridge | 2025 |
| Danum Services Limited | Doncaster | 2025 |
| Darago Limited | Hollinwood | 2018 |
| Darcy Skips Ltd | Hayes | 2016 |
| Daren George Ltd | Old Alresford | 2020 |
| Darenth Waste Limited | Erith | 2022 |
| Daridam Construction Limited | Barking | 2025 |
| Dark Blue (UK) Limited | Gwent | 2004 |
| Dark Green Group (Leven) Ltd | Nottingham | 2025 |
| Dark Green Group (Tyseley) Ltd | Nottingham | 2024 |
| Darlington Skip Hire Ltd | Darlington | 2019 |
| Darlow Lloyd & Sons Limited | Nr Bridgend | 1973 |
| Darlow Lloyd Group Limited | Heol-Y-Cyw | 2008 |
| Darrington Quarries Limited | Doncaster | 1957 |
| Dart Asbestos Removal Ltd | Ashburton | 2023 |
| Dartec Environmental Services Limited | Neath | 1990 |
| Dartmouth Global Trading Co. Limited | Bourne | 1997 |
| Data Collect and Shred Ltd | Andover | 2022 |
| Data Vision Tech Solutions PVT Limited | Birmingham | 2025 |
| Datashredders Group Limited | Wimblington | 2016 |
| Datashredders Limited | Wimblington | 2006 |
| Datomic Services Limited | Neston | 2015 |
| Datum Precision Tooling Limited | Hampshire | 1992 |
| Dave & Rose Ltd | Sale | 2012 |
| Dave Bennett Limited | Potters Bar | 2016 |
| Dave Desi Ltd | Coventry | 2022 |
| Dave Head & Sons Land Regeneration Contractors Ltd | Ware | 2017 |
| Dave Peat Waste Limited | Cornwall | 1998 |
| Dave's Drains and More Ltd | Blackpool | 2024 |
| Daves Transport Ltd | Betchworth | 2025 |
| Daveswasteaway Ltd | Ivybridge | 2023 |
| Davey Skips NI Limited | Derry | 2018 |
| David & Lucias Removals Ltd | Chessington | 2021 |
| David Field Furniture Ltd. | Charsfield Nr. Woodbridge | 1989 |
| David Hall & SON Ltd. | Tranent | 2002 |
| David Pearson Consultancy Limited | Northwich | 2003 |
| David Young (Joinery) Limited | West Heath | 1990 |
| Davie's Dumps Limited | Tain | 2021 |
| Davies Drainage Solutions Ltd | Falmouth | 2022 |
| Davies Salvage Limited | Nottingham | 2011 |
| Davies Skip Hire Limited | Kidderminster | 2024 |
| Davies’ Drainage Ltd | Canvey Island | 2023 |
| Davington Oare Limited | Milton Regis,Sittingbourne | 1985 |
| Davis Commercial Services Ltd | Birmingham | 2011 |
| Davy Glass Limited | West Bromwich | 1999 |
| Dawari Solutions Ltd | Newcastle Upon Tyne | 2023 |
| Dawley Industrial Services Limited | Church Stretton | 2015 |
| Dawlish Skip Hire Limited | Exeter | 2010 |
| Dawood Heating & Plumbing Services Ltd | Morden | 2019 |
| Daxen Spilsby Ltd | Bradford | 2021 |
| Dayle Construction Ltd | Redditch | 2022 |
| Days Waste Warriors Ltd | Lancing | 2024 |
| Daytona Contracting Ltd | March | 2007 |
| Dayz Waste Solutions Ltd | Ormskirk | 2021 |