| Dartford Stone Lodge Bowls & Social Clubs Limited | Kent | 1985 |
| Dartford Tigers Ltd | Dartford | 2025 |
| Dartford Wing Chun Ltd | Dartford | 2025 |
| Darting Promotions Limited | Stourbridge | 2018 |
| Dartington Hall Trust(The) | Totnes | 1980 |
| Dartlake Limited | Warrington | 1986 |
| Dartmill Limited | Radlett | 1983 |
| Dartmoor Dance School Limited | Yelverton | 2023 |
| Dartmoor Media Ltd | Paignton | 2023 |
| Dartmoor Outdoor Events Ltd | Teignmouth | 2024 |
| Dartmoor Zoological Society | Plymouth | 2017 |
| Dartmouth and District Indoor Pool Trust | Dartmouth | 2008 |
| Dartmouth Area Sports Hub C.I.C. | Dartmouth | 2024 |
| Dartmouth Boating Limited | West Charleton | 2023 |
| Dartmouth Classic Motor Cycle Club Ltd | Newton Abbot | 2004 |
| Dartmouth Contemporary Limited | Southampton | 2010 |
| Dartmouth Golf & Sporting Club Limited | Birmingham | 2017 |
| Dartmouth Sailing Club (Holdings) Limited | Birmingham | 1965 |
| Dartmouth Swimming Pool Company Limited | Dartmouth | 1987 |
| Darts Asylum Ltd | Bristol | 2023 |
| Darts Factory Ltd | Peterborough | 2023 |
| Darts Glasgow Ltd | Glasgow | 2019 |
| Darts in the Garden Ltd | Wigan | 2025 |
| Darts Lounge (Mansfield) Limited | Mansfield Woodhouse | 2024 |
| Darts Parts Ltd | Doncaster | 2025 |
| Darts Players Support Agency Ltd | Loughborough | 2026 |
| Darts, Doncaster Community Arts | Doncaster | 1996 |
| Dartscape UK Ltd | Whitehaven | 2025 |
| Dartsdudes Limited | Brierley Hill | 2018 |
| DARTSEVENTS4U Ltd | Surrey | 2013 |
| Dartsight Ltd | Oldham | 2012 |
| Dartssuppliesshop Ltd | Hyde | 2011 |
| Dartstudio Ltd | Motherwell | 2026 |
| Dartx Ltd | Peterborough | 2025 |
| Dartz Sports Arena Limited | Esher | 2025 |
| Daruma Dumpling Limited | London | 2025 |
| Darvel FC 1889 C.I.C. | Darvel | 2025 |
| Darvel Music Company | Darvel | 2008 |
| Darwen FC | Darwen | 2005 |
| Darwen Golf Club Limited | Darwen, | 1922 |
| Darwen Subscription Bowling Club Company,Limited | Darwen | 1897 |
| Darwin and Gray Limited | Chesterfield | 2020 |
| Darwin Events, Sport and Leisure Ltd | Bedford | 2013 |
| Darwin Gymnastics and Dance Ltd | Shrewsbury | 2020 |
| Darwin Media Limited | London | 2009 |
| Darwin Wellness Limited | Pinner | 2014 |
| Daryl & Co C.I.C. | London | 2022 |
| Daryl Browne Coaching Limited | Shrewsbury | 2004 |
| Daryl Jacob Racing Limited | Northampton | 2007 |
| Daryl Mccormack Ltd | Bromsgrove | 2022 |
| Daryl's Dragons FC Ltd | Shrewsbury | 2014 |
| Darza Productions Ltd. | Worthing | 2017 |
| DAS Brass Ltd | London | 2024 |
| DAS Industries Ltd | Nottingham | 2012 |
| DAS Isobar Ltd. | Luddenden Foot | 2012 |
| DAS Productions Ltd | London | 2024 |
| DAS Racing Limited | Bishops Stortford | 2018 |
| DAS the Company Ltd | Birmingham | 2021 |
| Dase Events Ltd | Croydon | 2025 |
| Dash & Sterling Ltd | Bromley | 2020 |
| Dash - Delivering Activities Sports and Healthy Habits Ltd | Mansfield | 2025 |
| Dash Art London Ltd | London | 2024 |
| Dash Arts Limited | London | 2001 |
| Dash Competitions Ltd | Inverness | 2025 |
| Dash IT & Correct Ltd | London | 2021 |
| Dash Sports Limited | Godalming | 2020 |
| Dash Together Ltd | Basingstoke | 2025 |
| Dasha Paradoks Ltd | St. Neots | 2024 |
| Dashing DES Limited | Ipswich | 2017 |
| Dashing Dino Limited | Rugby | 2022 |
| Dashing Donkeys Limited | Billingshurst | 2016 |
| Dashing Records Ltd | London | 2010 |
| Dashlyn Ltd | Manchester | 2023 |
| DAT Gym Ltd | Basingstoke | 2025 |
| DAT Racing Limited | Bolton | 2016 |
| Data Driven Units Ltd | London | 2025 |
| Data Electronics & Leisure Systems (NI) Limited | Co. Down | 2001 |
| Data Maintenance Limited | London | 2016 |
| Datacontent Ltd | | 2002 |
| Datalake Creative Ltd | London | 2023 |
| Datamade Ltd | High Peak | 2019 |
| Datamax 360 Limited | London | 2023 |
| Datapop Studio Ltd | London | 2025 |
| Datarepro Limited | Egham | 2010 |
| Datchet Golf Club (Trading) Ltd | Datchet | 2019 |
| Datchet Golf Club Limited | Datchet | 2003 |
| Datchet Health Club Ltd | Slough | 2011 |
| Datchet Water Sailing Club Limited | Slough | 1976 |
| Datcravat Limited | Hereford | 2024 |
| Date Look Ltd | London | 2020 |
| Date Night Creation Ltd | Prenton | 2025 |
| Date With Pride Ltd | Hoddesdon | 2024 |
| Datechnical Limited | Whitley Bay | 2016 |
| Daten Football Academy CIC | Warrington | 2023 |
| Datmayagyal KAR Ltd | London | 2025 |
| Dato Music Limited | Twickenham | 2023 |
| Datomec Design Limited | Solihull | 1994 |
| Dats Productions Limited | Stockport | 2026 |
| Datta Business Solutions Ltd | Hollinwood | 2019 |
| Datts Ltd | Basingstoke | 2023 |