| DMT Couriers Ltd | Transport & logistics | 2026 |
| DMT Motors Rotherham Ltd | Wholesale & retail | 2021 |
| DMW Fire and Electrical | | 2001 |
| DN Trade Motors Ltd | Wholesale & retail | 2020 |
| DNA Imports Limited | Wholesale & retail | 2021 |
| DNA Packaging Limited | Administrative & support | 2018 |
| DNA Rentals Limited | Real estate | 2021 |
| DNA Transport Logistic Limited | Transport & logistics | 2025 |
| DND Case Management Ltd | Health & social care | 2022 |
| DND Dynamic Ltd | Health & social care | 2025 |
| DNG Developments Ltd | Extraterritorial | 2014 |
| DO Interiors Holdings Ltd | Financial services | 2022 |
| DO Interiors Limited | Construction | 2012 |
| DO IT YER SEN Limited | Wholesale & retail | 2022 |
| DO Your Own Research Ltd | Information & communication | 2022 |
| Doba Ltd | Wholesale & retail | 2025 |
| Dobbin Court Management Limited | Households | 1983 |
| DOBBY888 Limited | Wholesale & retail | 2022 |
| Dobcroft Properties Limited | Real estate | 2025 |
| Dobson & Clarke Limited | Construction | 2012 |
| Docaj Construction Ltd | Construction | 2017 |
| Docherty Scaffolding Limited | Construction | 2023 |
| Doci Properties Ltd | Real estate | 2017 |
| Docs ( Derbyshire Ophthalmic Community Services ) Limited | Health & social care | 2015 |
| Doctor Detailing Ltd | Wholesale & retail | 2026 |
| Doctor Nick Sinden Ltd | Other services | 2014 |
| Doctor Steel Limited | Arts & recreation | 2018 |
| Doctors Orders Limited | Wholesale & retail | 2005 |
| Docufile Limited | Extraterritorial | 1988 |
| Document Features Limited | Information & communication | 2020 |
| Dodgem XXL Limited | Administrative & support | 2019 |
| Dodo Fried Chicken Ltd | Hospitality | 2025 |
| DOE Royd 1960 Limited | Extraterritorial | 2014 |
| Doerrfoto (UK) Limited | Wholesale & retail | 2008 |
| Dog and Bone Club Limited | Other services | 2021 |
| Dog House Hospitality Ltd | Hospitality | 2017 |
| Dogan Consultancy Services Ltd | Health & social care | 2020 |
| Dogchester Palace Limited | Other services | 2018 |
| Doggie DE Trimpia Ltd | Other services | 2025 |
| Dogs in Motion Ltd | Other services | 2021 |
| Dogs Inc. Limited | Other services | 2017 |
| Dogs Life Group Limited | Wholesale & retail | 2026 |
| Dogwood Lifestyle Limited | Professional & scientific | 2020 |
| Dolby's Dens Ltd | Real estate | 2019 |
| Dolcot Estates Limited | Real estate | 2025 |
| Dolled Aesthetics Limited | Health & social care | 2019 |
| Dolly Hair Care Ltd | Other services | 2025 |
| Dolly Mill Fisheries Ltd | Agriculture & fishing | 2019 |
| Dolly’S Dough Limited | Hospitality | 2021 |
| Dolman PUB Company Ltd | Hospitality | 2023 |
| Dolphin (Sheffield) Limited | Manufacturing | 1974 |
| Dolphin Catering Fabrications Ltd | Other services | 2016 |
| Dolphin Freight Services Limited | Transport & logistics | 1989 |
| Dolphin Hand Car Wash Limited | Administrative & support | 2020 |
| Dolphin Hospitality Limited | Administrative & support | 2025 |
| Dolphin Hotel (Hampshire) Limited | Hospitality | 2009 |
| DOM Rugman Studio Ltd | Professional & scientific | 2024 |
| Domac Fire Pro Ltd | Construction | 2018 |
| Domain Names Bureau Ltd | Professional & scientific | 2015 |
| Domains UK Limited | Information & communication | 2003 |
| Domcarers Limited | Administrative & support | 2017 |
| Domestic Heating (UK) Ltd | Construction | 2002 |
| Domestic Trades Services Ltd | Construction | 2020 |
| Domidrive Limited | Transport & logistics | 2013 |
| Domino Commercial Holdings Limited | Financial services | 2015 |
| Domino Interiors Limited | Extraterritorial | 2018 |
| Domino Mechanical and Electrical Limited | Construction | 2015 |
| Domino Mechanical Holdings Limited | Financial services | 2023 |
| Domo Holiday Lettings Ltd | Hospitality | 2024 |
| Domo Restaurant Ltd | Hospitality | 2018 |
| Domosapiens Ltd | Real estate | 2024 |
| Domus Male Grooming Ltd | Other services | 2026 |
| DON Cottage Management Limited | Households | 2007 |
| DON Squared Ltd | Administrative & support | 2022 |
| DON Threads Limited | Wholesale & retail | 2021 |
| DON Valley Garages & Workshops Ltd | Wholesale & retail | 2020 |
| DON Valley M.O.T Centre Limited | Wholesale & retail | 2015 |
| DON Valley Plant Limited | Administrative & support | 2012 |
| DON Valley Precision Engineers Limited | Extraterritorial | 1999 |
| DON Valley Property Management Limited | Real estate | 2019 |
| DON Valley Steel Fabricators and Engineers Limited | Manufacturing | 1998 |
| DON Valley Window Systems Limited | Manufacturing | 1991 |
| Don'T Stash IT Cash IT Ltd | Wholesale & retail | 2010 |
| Don'T Zig-Zag Ltd | Information & communication | 2011 |
| Donald Cooke Holdings Limited | Financial services | 2021 |
| Donald Cooke Limited | Wholesale & retail | 2002 |
| Donald Enterprise Limited | Wholesale & retail | 2015 |
| Doncaster Dartes S.C | Arts & recreation | 2009 |
| Doncaster Professional Services Ltd | Transport & logistics | 2025 |
| Doncaster Telecom Limited | Extraterritorial | 2009 |
| Dondottaz Scalp Micro Pigmentation Limited | Other services | 2026 |
| Dongxu Ltd | Hospitality | 2019 |
| Doniox Ltd | Construction | 2023 |
| Donkey Business Ltd | Hospitality | 2025 |
| Donklex&Co Ltd | Construction | 2025 |
| Donna Williams Ltd | Information & communication | 2003 |
| Donney European Ltd | Wholesale & retail | 2007 |
| Donney Express Ltd | Wholesale & retail | 2024 |
| Donoss Ltd. | Information & communication | 2003 |
| Donovan Estates Ltd | Financial services | 2012 |