| DJC Consultancy Limited | Energy | 2020 |
| DJS Managers Ltd | Real estate | 2021 |
| DK Watches Ltd | Wholesale & retail | 2020 |
| DKH Projects Ltd | Professional & scientific | 2022 |
| Dkmr Associates Ltd | Professional & scientific | 2024 |
| DL Insulation&Access Services Limited | Construction | 2019 |
| DLC Studios Ltd | Information & communication | 2018 |
| Dlhgroup Ltd | Wholesale & retail | 2022 |
| DLR Care Ltd | Public administration | 2019 |
| DM Design Group Ltd | Professional & scientific | 2024 |
| DMB Trading Ltd | Wholesale & retail | 2021 |
| DMP Driving Services Ltd | Transport & logistics | 2022 |
| DMR Analytics Limited | Information & communication | 2024 |
| DMS Accountants Company Limited | Professional & scientific | 2014 |
| DMS Healthcare Limited | Health & social care | 2013 |
| DNA Roofing Limited | Construction | 2026 |
| DNM Heating Ltd | Construction | 2021 |
| Dodgy Dog Walking Limited | Other services | 2025 |
| Dodl Holdings Ltd | Other services | 2020 |
| Dog Box Limited | Wholesale & retail | 2019 |
| Dog House Southport Ltd | Hospitality | 2019 |
| Doggie Dayz Ltd | Other services | 2021 |
| Dogs Dinner Club Limited | Manufacturing | 2022 |
| Dolce Alfresco Ltd | Hospitality | 2025 |
| Dolce Hospitality Ltd | Hospitality | 2025 |
| Dolce Italian Ltd | Hospitality | 2024 |
| Dolcie Deli Limited | Hospitality | 2023 |
| Dolcie Limited | Wholesale & retail | 2019 |
| Dolcie Tanning Limited | Other services | 2024 |
| Dollie Bunnies Ltd | Hospitality | 2026 |
| Dolphines Care Ltd | Health & social care | 2014 |
| DOM Bathrooms Ltd | Construction | 2021 |
| Dome Clothing Ltd | Wholesale & retail | 2018 |
| Dome Retail Ltd | Wholesale & retail | 2018 |
| Domewood Properties Ltd | Construction | 2019 |
| Domicilia Estates Limited | Real estate | 2015 |
| Dommarcia Smith Ltd | Financial services | 2014 |
| Doorstopworld Ltd | Manufacturing | 2010 |
| Double Width Wallpaper Ltd | Construction | 2025 |
| Dovehaven Limited | Financial services | 2025 |
| Dovehaven Residential Care Home Limited | Health & social care | 1986 |
| Dovehaven Services LLP | | 2020 |
| Dovehaven Topco Limited | Financial services | 2025 |
| Dover Point Flat Management Limited | Households | 2014 |
| Dover Street Insurance Brokers Limited | Financial services | 2016 |
| Dow-Ce Ltd | Manufacturing | 2024 |
| Doward Brothers Limited | Real estate | 1895 |
| Down Tools CIC | Education | 2020 |
| Downham Court Flat Management (Southport) Limited | Households | 2004 |
| Downtown Property & Letting Co Ltd | Administrative & support | 2009 |
| Doyle & Associates Limited | Professional & scientific | 2012 |
| Doyle Group Ltd | Real estate | 2025 |
| DPA Jamming Services Ltd | Administrative & support | 2011 |
| Dpbp-(Dont Panic BE Prepared) Limited | Health & social care | 2015 |
| DR Brickworks Ltd. | Construction | 2019 |
| DR David Hughes Radiology Limited | Health & social care | 2016 |
| DR Jayne Merrin Ltd | Health & social care | 2019 |
| DR Katie Jackson-Roe Ltd | Health & social care | 2025 |
| DR Melanie Aesthetics Ltd | Health & social care | 2025 |
| DR Nelson & Sons Ltd | Hospitality | 2020 |
| DR Therapy Ltd | Health & social care | 2021 |
| DR. ESA Surgery Limited | Health & social care | 2010 |
| Dragon Comtech Ltd | Information & communication | 2024 |
| Drake Medical Services Limited | Health & social care | 2022 |
| Dramic Limited | Professional & scientific | 2023 |
| Dream Finance UK Ltd | Financial services | 2023 |
| Dreams Landscapes Limited | Administrative & support | 2024 |
| Dreamy Wool Ltd | Wholesale & retail | 2021 |
| Dreher Properties Ltd | Real estate | 2022 |
| Drekar Consulting Ltd | Professional & scientific | 2025 |
| Driburnt Flat Management Limited | Households | 1979 |
| Drilmoq Ltd | Information & communication | 2025 |
| Driver Guardian Limited | Financial services | 2011 |
| Driver Guardian Rescue Limited | Transport & logistics | 2021 |
| Drivestandard Limited | Real estate | 1997 |
| Droidbar Ltd | Information & communication | 2021 |
| DRS Heat Transfer Ltd | Manufacturing | 2013 |
| DS Assets Ltd | Real estate | 2025 |
| Dsgn by AR Ltd | Wholesale & retail | 2024 |
| Dsgo Limited | Administrative & support | 2020 |
| DSM Property Management Limited | Real estate | 2022 |
| DSR Commercial Services Limited | Professional & scientific | 2013 |
| DSR Property Investments Limited | Real estate | 2019 |
| DT Electrical (UK) Ltd | Construction | 2012 |
| DTP Rail Limited | Construction | 2015 |
| Duck EGG Investments Limited | Real estate | 2019 |
| Dumicare Ltd | Other services | 2017 |
| Dunamis Allied Services Ltd | Health & social care | 2019 |
| Dunmaghlas Forest Products Limited | Professional & scientific | 2022 |
| Dunns Properties Limited | Real estate | 2007 |
| Duos Detailing Ltd | Administrative & support | 2026 |
| Duraproducts Limited | Professional & scientific | 2005 |
| Durbins Legal Estates Limited | Real estate | 2008 |
| Durose Holdings Ltd | Professional & scientific | 2026 |
| DW Tyre & Fleet Services Ltd | Wholesale & retail | 2023 |
| DWA Consultancy Limited | Professional & scientific | 2023 |
| DWA Surveyors Limited | Real estate | 2010 |
| DWB Farming Ltd | Agriculture & fishing | 2018 |
| Dwfms Group Limited | Construction | 2017 |
| Dyad Safety Solutions Ltd | Construction | 2022 |