| Direct Debit Limited | Reading | 1988 |
| Direct Design Limited | Macclesfield | 1988 |
| Direct Electric Limited | Loughborough | 1996 |
| Direct Essentials Ltd | Dagenham | 2024 |
| Direct Ferries (Ireland) Ltd | Portadown | 2003 |
| Direct Freight Logistics Limited | Telford | 2003 |
| Direct Garage Doors Ltd | Sheffield | 2017 |
| Direct Healthcare Group Holdings Limited | Caerphilly | 2016 |
| Direct Healthcare Group Management Limited | Caerphilly | 2016 |
| Direct Healthcare Services Limited | Caerphilly | 2017 |
| Direct Horizons Limited | Hinckley | 2025 |
| Direct Hospitality (UK) Ltd | Worcester | 2014 |
| Direct Insurance Underwriting Agency Limited | London | 2005 |
| Direct Inter-Active Limited | Billingham | 2011 |
| Direct Invest Ltd | London | 2011 |
| Direct Law and Personnel Limited | Bury | 2014 |
| Direct Link (Contract Services) Ltd | Crayford | 2019 |
| Direct Link (London) Ltd | Crayford | 2013 |
| Direct Link Express Ltd | Crayford | 2013 |
| Direct Link Premier (Recruitment) Ltd | Crayford | 2019 |
| Direct Link Premier Group Ltd | Crayford | 2019 |
| Direct Link Premier Limited | Crayford | 2016 |
| Direct Link Premier Services Limited | Crayford | 2016 |
| Direct Link Transport Ltd | Crayford | 2013 |
| Direct Mail Systems Limited | Bristol | 2009 |
| Direct Marketing Services Limited | Coventry | 2021 |
| Direct Moves Estate Agents Dorset Ltd | Weymouth | 2017 |
| Direct Office Consumables Limited | Badby | 1999 |
| Direct Pest Control Limited | Huddersfield | 2010 |
| Direct Property Sales Limited | Luton | 1996 |
| Direct Registrations Limited | Preston | 1998 |
| Direct Renewables Ltd | Great Yarmouth | 2023 |
| Direct Sales Online Limited | Pontefract | 2010 |
| Direct Sand and Gravel Limited | Poole | 2024 |
| Direct Seafoods Limited | Southport | 2014 |
| Direct Service Solutions Limited | Stockport | 2014 |
| Direct Sports Management Ltd | Beckenham | 2015 |
| Direct Sun Ltd | Hatfield | 2023 |
| Direct Supply Chains Ltd | Rochester | 2018 |
| Direct to Site Contractor Services Limited | Derby | 2008 |
| Direct Valeting & Detailing Ltd | Benfleet | 2025 |
| Direct Vehicle Salvage Ltd | Bedford | 2012 |
| Direct Water Coolers Limited | Dunstable | 2001 |
| Direct Welding Supplies Ltd | Wickford | 2012 |
| Direct Window Cleaning Services Limited | Bushey | 2008 |
| Direct Wines (Windsor) Limited | Theale, Berkshire | 1997 |
| Direction and Design Limited | Exeter | 2017 |
| Directive Holdings Limited | London | 2007 |
| Directly Financial Ltd | Milton Keynes | 1993 |
| Director Management Ltd | Belfast | 1997 |
| Director Services Limited | Belper | 2001 |
| Director Tax Planning and Advice Ltd | Kidderminster | 2013 |
| Directorbank Limited | London | 2008 |
| Directors Association Limited | Maidenhead | 2006 |
| Directors CUT Films North Limited | Birgham | 2009 |
| Dirft Africa Limited | Northampton | 2024 |
| Diri Ltd | Bromley | 2025 |
| Dirtbikelodge Ltd | Doncaster | 2023 |
| Dirty Costello Limited | London | 2016 |
| Dirty Media Limited | Harrogate | 2026 |
| Dirty Old Town Ltd | Salford | 2015 |
| Disarmed Group Ltd | Fareham | 2021 |
| Disassembled Limited | London | 2019 |
| Disaster AID International | High Peak | 2018 |
| Disbay Ltd | London | 2024 |
| Discerning Journeys Limited | Oxfordshire | 1994 |
| Discipline & Delight Ltd | Willenhall | 2025 |
| Discipling Nations to Christ Ministries Limited | Haverfordwest | 2017 |
| Disco Leisure Group Ltd | Nottingham | 2020 |
| Discount Boat Hire Limited | Alvechurch | 2022 |
| Discount Mobility Limited | Penryn | 2010 |
| Discount on Drinks Ltd | Barking | 2013 |
| Discount Tiles Direct Limited | Huntingdon | 1998 |
| Discount Vending Supplies Limited | Brighton | 2013 |
| Discover Upholstery Ltd | Taunton | 2016 |
| Discovering Dreams Ltd | London | 2024 |
| Discovertech Solutions Ltd | Bagshot | 2022 |
| Discovery Battlefield Tours Ltd | Sturminster Newton | 2015 |
| Discovery Foods Limited | London | 2014 |
| Discovery Lane Limited | Burnley | 2017 |
| Discovery Offshore Holdings NO.2 Limited | London | 2010 |
| Discovery Park Property Investments Ltd | London | 2022 |
| Discovery Quay Property Limited | Falmouth | 2006 |
| Discovery Well Integrity Ltd | Aberdeen | 2014 |
| Discovrus Limited | London | 2018 |
| Discreteheat Distribution Limited | Manchester | 2013 |
| Discretion Assured Ltd | Bristol | 2018 |
| Disguise Aesthetics Ltd | London | 2023 |
| Dishatech Solutions Limited | Barking | 2025 |
| Diskshred Ltd | Newtownabbey | 2009 |
| Dispak (Midlands) Limited | Calne | 1975 |
| Dispak (Northern) Limited | Calne | 2019 |
| Dispense Solutions (Wales) Limited | Wrexham | 2013 |
| Dispense Systems Limited | West Horndon | 2003 |
| Disperse Pharma Limited | Guildford | 2002 |
| Dispharma Commodities Limited | Birmingham | 1994 |
| Display Rights Limited | Milton Keynes | 2021 |
| Display Spesialisten Limited | London | 2009 |
| Disruptive Technologies Solutions Limited | Worksop | 2014 |
| Disruptive Technology Limited | Bradford | 2012 |