| Draincare (Leic) Limited | Leicester | 1996 |
| Draincare Direct Ltd | Staines-Upon-Thames | 2018 |
| Draincare East Yorkshire Ltd. | Goole | 2021 |
| Draincare Ltd | Hertford | 2018 |
| Draincare Reactive Ltd | Cardiff | 2018 |
| Draincare Technology Limited | Bilston | 1999 |
| Drainco Limited | Bristol | 2002 |
| Draincore Ltd | Colchester | 2026 |
| Draincure (SW) Limited | Torquay | 2005 |
| Draindragons Ltd | London | 2021 |
| Drainex Environmental Solutions Limited | London | 2012 |
| Drainex FM Ltd | London | 2024 |
| Drainfix Services Limited | Billericay | 2016 |
| Drainflo Limited | Stockport | 2020 |
| Drainflow (Aberdeen) Ltd. | Aberdeen | 2002 |
| Drainforce Limited | Bridgend | 2009 |
| Draingain Ltd | Wallingford | 2013 |
| Drainguard Ltd | Bristol | 2024 |
| Drainhub Oxford Limited | Bicester | 2025 |
| Drainiac Ltd | Hitchin | 2023 |
| Drainjet Ltd | Kettering | 2012 |
| Drainline NE Ltd | Gateshead | 2021 |
| Drainmaintain Limited | Colchester | 2024 |
| Drainmar Limited | Peterborough | 2003 |
| Drainmen Limited | Cardiff | 2003 |
| Drainology Limited | Cardiff | 1995 |
| Drainrite (Dorset) Limited | Bournemouth | 2010 |
| Drainrite Environmental Services Limited | Wigan | 2000 |
| Drainrod Limited | Newport | 1977 |
| Drains & Mains Ltd | West Malling | 2021 |
| Drains & Watermains Ltd | Rushden | 2025 |
| Drains 2 Mains Ltd | Wickford | 2023 |
| Drains Ahead Limited | Croydon | 2006 |
| Drains Express Limited | London | 2023 |
| Drains First Limited | Leeds | 2006 |
| Drains Flow Ltd | Rochester | 2019 |
| Drains R US (Eastern) Limited | Spalding | 2003 |
| Drains South East Limited | Bexhill-On-Sea | 2019 |
| Drains Squad Ltd | London | 2019 |
| Drains to Flow Ltd | Newtownards | 2022 |
| Drains Today Ltd | Mold | 2009 |
| Drains UK 2000 (Lining) Ltd | York | 2014 |
| Drains UK 2000 Limited | York | 2023 |
| Drains-R-Us Norfolk Ltd | Norwich | 2024 |
| DRAINS4YOU Ltd | Swansea | 2019 |
| Drainscan Limited | Nottingham | 1971 |
| Drainscan Midlands Ltd | Kingswinford | 2020 |
| Drainscapes Ltd | Rochester | 2026 |
| Drainserv Ltd | Caernarfon | 2023 |
| Drainserve South East Limited | Keston | 2015 |
| Drainstore Systems Limited | Heanor | 2015 |
| Draintec Solutions Limited | | 2006 |
| Draintech South Ltd | Epsom | 1997 |
| Draintech Tankers.Com Limited | Andover | 2015 |
| Draintex Ltd | Wakefield | 2007 |
| Draintube Limited | Wallasey | 2016 |
| Drainwave Solutions Ltd | Christchurch | 2025 |
| Drainworx Limited | Welwyn Garden City | 2010 |
| Drainxpert Ltd | Wisbech | 2025 |
| Drake Services Ltd | Port Talbot | 2018 |
| Drayn Ltd | London | 2024 |
| Drayton Drainage Services Ltd | Portsmouth | 2023 |
| Drayton Kilns Limited | Manchester | 1965 |
| Drayton Plastics Ltd | West Drayton | 2021 |
| DRB Resources Limited | Worcestershire | 2002 |
| Drca Group Ltd | Leeds | 2024 |
| DRE Property Group Limited | Blyth | 2019 |
| Dream Drains Ltd | Woodbridge | 2017 |
| Dream Driveways & Landscaping Ltd | Peterborough | 2015 |
| Dreampurity Limited | Feltham | 2025 |
| Dreams Haulage Limited | Harlow | 2018 |
| Dreem Kitchens Limited | Manchester | 1962 |
| Drew Maintenance Ltd | Basildon | 2007 |
| Drinking Water Pure and Simple Ltd | Bristol | 2020 |
| Drinking Water Solutions (London) Limited | Cardiff | 2004 |
| Drives 4 U (North West) Ltd | Manchester | 2021 |
| DRM Aggregate Solutions Ltd | Shrewsbury | 2019 |
| DRM Environmental Ltd | Hertford | 2020 |
| Drmp Limited | London | 2021 |
| Drop of Water Cleaning & Maintenance Ltd | Swindon | 2025 |
| Droppoint Courier Services Ltd | Middlesbrough | 2025 |
| Drops Full Logistics Ltd | Southampton | 2024 |
| DRS Land Regeneration Ltd | Newcastle Upon Tyne | 2021 |
| DRS Recovery Services Ltd | Dudley | 2026 |
| Drs.Car Parts Ltd | Sheerness | 2025 |
| DRT Metal Recycling Limited | Leeds | 2009 |
| Drumcare Limited | Bridge Road, Great Bridge, | 1993 |
| Drurys Environmental Services Ltd | North Walsham | 2016 |
| Drurys Transport Ltd | North Walsham | 2000 |
| Dryclone International (UK) Limited | London Wc1N 3Ax | 2020 |
| Dryden Furniture (Manufacturing) Ltd | Tyne & Wear | 1995 |
| DS London Waste Solutions Limited | London | 2024 |
| DS Recycling & Metals Limited | Wakefield | 2021 |
| DS Smith Recycling UK Limited | London | 1926 |
| DS Water Limited | London | 2017 |
| DSA Aviation Services Ltd | London | 2015 |
| DSA Connect Group Ltd | Harold Wood | 2025 |
| DSC Scaffolding & Waste Ltd | Saltash | 2020 |
| DSD Recycling Ltd | London | 2025 |
| DSD Utilities Ltd | Dartford | 2026 |