| Drayton Prime Ltd | Cardiff | 2021 |
| Dread Services Scotland Ltd | Keith | 2009 |
| Drill Accounting Limited | Aberdeen | 2013 |
| Drill Pipe & Equipment Supplies Ltd. | Aberdeen | 2001 |
| Drill-Wright Limited | Inverurie | 1996 |
| Drillablebrush Co Global Ltd | East Drayton | 2019 |
| Drillco Europe Ltd | Leigh | 2016 |
| Drilling & Workover Consultancy Services Limited | Truro | 2005 |
| Drilling Expert Legal Services Limited | Hull | 2014 |
| Drilling Logistic Services Ltd | Cottingham | 2023 |
| Drilling Ltd | Rowlands Gill | 2017 |
| Drilling Materials & Logistics Services Ltd | Montrose | 2010 |
| Drilling Partners International Limited | Great Yarmouth | 1988 |
| Drilling Solutions International Limited | Lincoln | 1993 |
| Drillready Limited | Grangemouth | 2018 |
| Dring Offshore Ltd | South Shields | 2025 |
| Driscoll International Chemical Co., Ltd | Cambridge | 2026 |
| DRO Crane Services Limited | Great Yarmouth | 2024 |
| Drop Zone Abseiling Ltd. | London | 2013 |
| Drumadooey Concrete (N.I.) Limited | Londonderry | 2023 |
| Drumburn Energy Limited | Aberdeen | 2015 |
| Drumhead Quarry Limited | Stirlingshire | 2011 |
| Drumhead Sandstone Limited | Stirlingshire | 2013 |
| Drumhoyle Limited | Belfast | 2013 |
| Drummond Enterprises Limited | Banchory | 2013 |
| Drumsmittal Technical Services Ltd | Inverness | 2013 |
| DS Global Expediting Services Ltd | Oswestry | 2015 |
| DS Mechanical & Construction Limited | Glasgow | 2015 |
| DSH RAT Limited | St Fergus | 2013 |
| DSI Underground UK Limited | West Midlands | 2001 |
| DSL Services Ltd | Whitby | 2016 |
| DSL Wells Ltd | Montrose | 2019 |
| DSM Technical Services Ltd | Kirkcaldy | 2023 |
| Dsmuk Consulting Ltd | Barnet | 2022 |
| DSR Technologies Ltd | Woking | 2018 |
| Dsras Ltd | Dundee | 2017 |
| DT Quarry Operative Limited | Askam-In-Furness | 2014 |
| DTL (Scotland) Limited | 5 West Victoria Dock Road | 2008 |
| Dubhor Energy Limited | Aberdeen | 2007 |
| DUC Khanh Vina Materials Co., Ltd | Beckenham | 2021 |
| Duckett Hill Quarry Limited | Rushyford | 2022 |
| Dudman (Slindon) Limited | Brighton | 2022 |
| Dudman Aggregates Limited | Exeter | 2011 |
| Dudman Aggregates Properties Limited | Brighton | 1998 |
| Dudman Group Trading Limited | Milton Keynes | 2013 |
| DUE Even Lift Ltd | London | 2019 |
| Dukoco Ltd | Newark | 2019 |
| Dulay Stone Sales Limited | West Yorkshire | 2004 |
| DUM Spiro Limited | Aberdeen | 2025 |
| Dunamis Capital Solutions Ltd | London | 2024 |
| Duncan Energy Services Ltd | Brechin | 2025 |
| Dunhouse Quarry Co.Limited | Darlington | 1954 |
| Dunlin Management Limited | London | 2024 |
| Dunnichen Process Services Ltd | Montrose | 2011 |
| Dunonin Resources Ltd | Exeter | 2026 |
| Dunston Rock MAN Limited | Dover | 2026 |
| Dunton Brothers Limited | Haywards Heath | 1996 |
| Dupplin Engineering Ltd | Perth | 2016 |
| Dursand Ltd | Bishop Auckland | 2015 |
| Dust Collectors and Power Equipment Limited | South Ockendon | 2020 |
| Dutch Shell London Technology Limited | West Midlands | 2023 |
| Dvkgold Ltd | Rushden | 2019 |
| DW Pipe Services Ltd | Jarrow | 2013 |
| DWK Drilling Services Ltd | Montrose | 2020 |
| DWS Services Ltd | Wick | 2025 |
| DWS Wells Ltd | Inverurie | 2022 |
| DXC Geological Ltd | Middlesbrough | 2017 |
| Dymacore Ltd | Newton Abbot | 2014 |
| Dynamic Control Solutions Ltd | Great Yarmouth | 2012 |
| Dynamic Process Simulation Limited | Lydney | 2000 |
| Dynamic Tech Systems Ltd | Welshpool | 2024 |
| Dynamic Terra Solutions Ltd | Stoke-On-Trent | 2025 |
| Dyon E&P Limited | London | 2005 |
| Dyon UK Limited | London | 2005 |
| E & M Hydraulic Services Ltd | Montrose | 2006 |
| E M Cable Holdings Limited | Aberdeen | 2012 |
| E M Cable Services (North Sea) Limited | Aberdeen | 1984 |
| E M Landscapes and Gardening Limited | | 2002 |
| E S & S Ltd | Inverurie | 2014 |
| E S Robertson Ltd | London | 2018 |
| E&H Inspection Ltd | London | 2025 |
| E&R (Portugal) Ltd | London | 2023 |
| E. & J. W. Glendinning (Holdings) Limited | Newton Abbot | 1995 |
| E.A.S. (Plant Hire) Limited | Kings Lynn | 1998 |
| E.And J.W.Glendinning Limited | Newton Abbot | 1958 |
| E.M.A. Engineering Limited | Inverurie | 1991 |
| E.M.A. Supply Limited | Edgware | 2017 |
| E.V. Industrial Services Limited | Stockton-On-Tees | 2019 |
| E.V. Offshore Limited | Norwich | 2000 |
| E3ENERGIE Co. Limited | London | 2019 |
| EA Gold Company and Refineries Ltd | Purley | 2023 |
| EAG Well Services Ltd | Montrose | 2018 |
| Eagle GAS Limited | London | 2016 |
| Eagle Global Europe ( UK) Limited | Dartford | 2025 |
| Eagle H C Ltd | London | 2006 |
| Eagles Heating & Plumbing Limited | Coventry | 2021 |
| Earls Stone Limited | Macclesfield | 1996 |
| Earsham Gravels Limited | Earsham | 1960 |
| Earth Resources Limited | Hendy | 1986 |
| Earthlime Limited | Marlborough | 2013 |