| Dilkash Theatre UK CIC | Rochdale | 2025 |
| Dillie Keane Ltd | High Wycombe | 2013 |
| Dillon M Collins Ltd | London | 2026 |
| Dillon Media Limited | London | 2018 |
| Dillon Morse Football Limited | Durham | 2022 |
| Dillons Health and Fitness Limited | Ilkley | 2010 |
| Dilse Events Ltd | Stockton On Tees | 2019 |
| Dilva Limited | Ashton-Under-Lyne | 2024 |
| Dilworth Lighting & Rigging Limited | London | 2024 |
| Dilys Guite Players Limited(The) | Sheffield | 1957 |
| Dimaio Limited | London | 2017 |
| Dimaio Live Limited | London | 2017 |
| Dimaio Touring Limited | London | 2017 |
| Dimax Sport and Entertainment Agency Ltd | Coalville | 2024 |
| Dimehart Limited | Aylesbury | 1984 |
| Dimension 57 Ltd | London | 2020 |
| Dimension 8 Limited | Cardiff | 1990 |
| Dimension Live Limited | Holborn | 2023 |
| Dimension Three Event Services Ltd | Harrow | 2022 |
| Dimensionalpainting Ltd | Chesterfield | 2025 |
| Dimensions Festival Limited | Cheltenham | 2020 |
| Dimensions Health & Fitness Centre Limited | London | 2022 |
| Dimensions Indoors Limited | Leeds | 1992 |
| Dimensions Trampoline Club | Halstead | 2012 |
| Dimensionxmedia Ltd | London | 2021 |
| Dimitra Zafeiri Ltd | London | 2024 |
| Dimitreebg Ltd | Uzbridge | 2017 |
| Dimitri DE BIE Limited | London | 2011 |
| Dimity NE Ltd | South Shields | 2025 |
| Dimlands Farm Riding School Limited | Llantwit Major | 2003 |
| Dimmer JIM Limited | Rickmansworth | 2002 |
| Dimple Discs Limited | Lewes | 2020 |
| Dimples Leisure Limited | Enfield | 2013 |
| Dina Ashersmith Ltd | Poole | 2013 |
| Dina Calcio Ltd | Manchester | 2025 |
| Dina Maria's Embroidery Designs Ltd | Ruislip | 2019 |
| Dina Venue Ltd | Sheffield | 2018 |
| Dinamic Ltd | Kidderminster | 2010 |
| Dinanukht Enterprises Limited | Wimbledon | 2024 |
| Dinas Mehndi Limited | London | 2016 |
| Dinas Powis Athletic Club (R.F.) Limited | Dinas Powys | 1923 |
| Dinas Powis Bowling Club Limited(The) | The Common | 1922 |
| Dinas Powis Lawn Tennis Club Limited | Dinas Powys | 1952 |
| Dinas Powis RFC Limited | Dinas Powys | 2018 |
| Dinastia Distribution Europe Limited | London | 2024 |
| Dinbren Shoot Limited | Porthmadog | 2025 |
| Dines Worldwide Ltd | Brentford | 2023 |
| Dinesh Nathan Comedian Ltd | Crawley | 2025 |
| Ding Dong Children Indoor Soft Play Centre Ltd | London | 2013 |
| Ding Dong Corporate Events Limited | London | 2019 |
| Ding Junhui Snooker Limited | London | 2013 |
| Dingle Fingle Ltd | Radstock | 2019 |
| Dingoes Academy Ltd | London | 2017 |
| Dingoes FC Ltd | London | 2014 |
| Dings Crusaders RFC Ltd | Winterbourne | 2015 |
| Dingwall Promotions Ltd | London | 2024 |
| Dingy Butterflies CIC | Gateshead | 2015 |
| Dinin Limited | Swindon | 2019 |
| Dink and Drive Ltd | Epsom | 2023 |
| Dink Club Ltd | London | 2025 |
| Dinkies Ltd | Dalbeattie | 2024 |
| Dinkies Swim School Limited | Billingham | 2019 |
| Dinks Pickleball Clubs 1 Ltd | Wolverhampton | 2025 |
| Dinks Pickleball Clubs Ltd | Wolverhampton | 2025 |
| Dinkspace Events Ltd | Eastleigh | 2026 |
| Dinkspace Group Ltd | Eastleigh | 2026 |
| Dinky Days Photography Ltd | Hornchurch | 2014 |
| Dinky Dino's Limited | Nottingham | 2016 |
| Dinky Parties Ltd | Upper Beeding, Steyning | 2014 |
| Dinky-Ducks Ltd | Little Staughton | 2018 |
| Dinner Dates Limited | London | 2006 |
| Dinnington Snooker and Pool Club Limited | Sheffield | 1995 |
| Dinnington Town Football Club Ltd | Sheffield | 2024 |
| Dinny-Sqrd Ltd | High Wycombe | 2022 |
| Dino Audio Limited | Brighton | 2017 |
| Dino Buttarazzi Productions Limited | Loughborough | 2021 |
| Dino Park Southport Limited | Southport | 2015 |
| Dino Productions Ltd | London | 2025 |
| Dino Tattoo Show Ltd | Sutton-In-Ashfield | 2023 |
| Dino, Action and Adventure Limited | Kingswinford | 2023 |
| DINO2HIRE Ltd | Lowestoft | 2021 |
| Dinobabyofficial Ltd | Sittingbourne | 2024 |
| Dinomania Ltd | Aberdare | 2015 |
| Dinomike Design Ltd | Kettering | 2016 |
| Dinosaur Adventure Live Limited | Harrow | 2021 |
| Dinosaur Bytes Studio Ltd | Huntingdon | 2018 |
| Dinosaur Fitness Ltd | Birmingham | 2023 |
| Dinosaur Park Ltd | London | 2003 |
| Dinostar Limited | Hull | 2003 |
| DIO Elite Ltd | Maidstone | 2023 |
| Diogenes Music Ltd | London | 2007 |
| Dion Property Limited | Ayr | 2008 |
| Dionne Manning @ Fitter Body Ladies Luton Ltd | Dunstable | 2022 |
| Dionysian Ltd | Wells | 2021 |
| Dionysus Theatre Ltd | Worthing | 2023 |
| Dioptric Limited | Thame | 2022 |
| Diorama Arts Centre | London | 1981 |
| Diorama Drama Limited | London | 2024 |
| Diors Candy Ltd | Dundee | 2025 |
| Diostunts Ltd | Gateshead | 2019 |