| Davmerry Limited | Brentwood | 1988 |
| Davoch Lodge Freehold Limited | London | 2023 |
| Davon Limited | Camberley | 2025 |
| Davstock Limited | Tunbridge Wells | 2022 |
| Davy Marler (Import) Limited | London | 1984 |
| Daway Ltd | Romford | 2025 |
| Dawcap Limited | London | 2012 |
| Dawes Associates Limited | Worcester | 2013 |
| Dawkins 1969 Limited | Poole | 2014 |
| Dawkins Group Ltd | Banstead | 2023 |
| Dawlish Flat Management Company Limited | Teignmouth | 1995 |
| Dawlish Masonic Hall Company Limited(The) | Dawlish | 1889 |
| Dawn Alison Solomon Ltd | Pensilva | 2025 |
| Dawn Collective Wealth Solutions Ltd | Manchester | 2025 |
| Dawn Court Bexhill Management Company Limited | Bexhill-On-Sea | 2002 |
| Dawn Crest Support Services Ltd | Manchester | 2026 |
| Dawn Harbor Trading House Ltd | Manchester | 2026 |
| Dawn Howard Productions Limited | London | 2023 |
| Dawn Jean Clode Limited | Bristol | 2022 |
| Dawn Maureen Nairne Ltd | Northolt | 2023 |
| Dawn Mist Property Care Ltd | Manchester | 2026 |
| Dawn of the Inner Light Ltd | Liverpool | 2011 |
| Dawnay Homes Limited | London | 1991 |
| Dawnchange Limited | Slough | 1988 |
| Dawner Investments Limited | Edgware | 2006 |
| Dawnforge Limited | Cardiff | 2016 |
| Dawnstar Enterprises Limited | Cannock | 2009 |
| Dawnterm Property Management Limited | London | 1987 |
| Dawntop Holding Limited | Stafford | 2011 |
| Dawnvale Catering Limited | Oldham | 2008 |
| Dawnvale Group Limited | Oldham | 2018 |
| Daws Heath Road 1964 Limited | Rayleigh | 2014 |
| Dawson (Tees Wharf) Limited | Middlesbrough | 1993 |
| Dawson Guarantee Company Limited | Swindon | 2009 |
| Dawson Road Limited | Milton Keynes | 2013 |
| Dawson-Bowman Limited | Glasgow | 2023 |
| Dawsongroup Global Limited | Milton Keynes | 2020 |
| Dawsonrentals Finance Limited | Buckinghamshire | 2007 |
| DAX Group Ltd | Stoke On Trent | 2015 |
| Daxel Solutions Limited | Bury | 2021 |
| Daxfield Limited | Bury | 2021 |
| Daxon Limited | Liverpool | 2014 |
| Daxprodriver Ltd | Sheffield | 2016 |
| Daxur Studios Ltd | Farnborough | 2020 |
| Day Aggregates Limited | Brentford | 1986 |
| Day by Day Asset Management Ltd. | London | 2024 |
| Day CAN Marine Ltd | London | 2026 |
| Day Contracting Limited | Brentford | 1999 |
| Day Equestrian Limited | Middlesex | 2005 |
| Day Property Holdings Ltd | Leamington Spa | 2021 |
| Day TEN Ltd | Croydon | 2022 |
| Day Waste Management Limited | Middlesex | 1998 |
| Day WIN Ltd | Spalding | 2016 |
| Day's Recycling Limited | Middlesex | 1997 |
| Day-Timers Europe Limited | Aylesbury | 1994 |
| DAY4NIGHT Ltd | Cardiff | 2022 |
| Daya & Sons Limited | Harrow | 2008 |
| Daya Surgery Ltd | Birmingham | 2013 |
| Dayan Consulting Ltd | Bath | 2022 |
| Dayang Shipping Co., Limited | Beckenham | 2014 |
| Daybones Interactive Ltd | Edenbridge | 2024 |
| Daybreak Productions Ltd | Cambridge | 2023 |
| Daybrook Business Centre Limited | Ashton Under Lyne | 2015 |
| Daycool Limited | Whitley Bay | 1997 |
| Daygard Hospitality Logistics Ltd | Stratford | 2024 |
| Dayi Architecture Ltd | London | 2023 |
| Dayla Liquid Packing Limited | Newton-Le-Willows | 1958 |
| Daylight Support Ltd | Manchester | 2023 |
| Daylong Limited | Derby | 2007 |
| Daymark International (U.K.) Co., Ltd | | 2004 |
| Daynight Support Ltd | Glastonbury | 2022 |
| Dayo Holdings Ltd | London | 2022 |
| Days Animal Health Limited | Crewe | 2003 |
| Days Farm Cattery Ltd | Salisbury | 2023 |
| Days OUT Info Limited | York | 2024 |
| Dayslikethese Limited | Weybridge | 2002 |
| Daytona Motorsport Limited | Esher | 2010 |
| Daytonamac Limited | Brighton | 2011 |
| Dazlondon Ltd | London | 2018 |
| Dazzling Group Limited | London | 2018 |
| DB Auto Part Co., Limited | Manchester | 2016 |
| DB Automation Limited | Beccles | 2009 |
| DB Ceramic London Ltd | Borehamwood | 2022 |
| DB Drinks Services Ltd | Nuneaton | 2025 |
| DB International (Bristol) Limited | Bristol | 2017 |
| DB Quality Consultancy Ltd | Motherwell | 2023 |
| DB Quan Trade Ltd | London | 2020 |
| DB Records Limited | Bristol | 1998 |
| DB Recovery Resources Ltd | London | 2015 |
| DB Recruitment Ltd | Bristol | 2016 |
| DB Restaurants Leics Ltd | Leicester | 2024 |
| DB Subsea Limited | Reading | 2017 |
| DB Towerwood Ltd. | Glasgow | 2021 |
| DB Wired Limited | Chesterfield | 2024 |
| Db.Architecture Limited | Romney Marsh | 2007 |
| Db.Art Limited | London | 2025 |
| DB1 Holdings Limited | Nottingham | 2022 |
| DBA Investments Limited | Wolverhampton | 2009 |
| DBC Mesa Limited | Essex | 2000 |
| DBE Gaming Ltd | Spalding | 2022 |