| D.A. Construction Group Ltd | Construction | 2025 |
| Dabbl Properties Limited | Real estate | 2026 |
| Dachi Fashion Studio Ltd | Manufacturing | 2024 |
| Dahnish Limited | Information & communication | 2008 |
| Daily Hire Limited | Administrative & support | 2023 |
| Dairyless Ltd | Wholesale & retail | 2021 |
| Daisy Paper & Tissue Ltd | Manufacturing | 2017 |
| Dale Acoustics Limited | Manufacturing | 2003 |
| Dale END Mills Limited | Real estate | 1981 |
| Dale Intertec Limited | Manufacturing | 2003 |
| Dalebuild Limited | Construction | 2000 |
| Daleby Ltd | Real estate | 2021 |
| Dalec UK Ltd | Construction | 2005 |
| Dales Access and Tree Services Limited | Agriculture & fishing | 2006 |
| Dales Design and Developments Ltd | Professional & scientific | 2013 |
| Dales Design Ltd | Construction | 2016 |
| Dalesway Caravans Ltd | Wholesale & retail | 2017 |
| Dalton Motors Ltd | Wholesale & retail | 2019 |
| Damac Consulting Limited | Professional & scientific | 2021 |
| Damems Developments Limited | Construction | 2006 |
| Damems Road Ltd | Professional & scientific | 2020 |
| DAN Simmons Decorators Limited | Construction | 2025 |
| Danemarsh Limited | Hospitality | 2019 |
| Danetree Controls Limited | Professional & scientific | 2008 |
| Danielle Brown Limited | Arts & recreation | 2012 |
| Dante Daniele Marcuccio Limited | Extraterritorial | 2022 |
| Dargan Industries LLP | | 2020 |
| Dargan Properties LLP | | 2011 |
| Darqawi Ltd | Financial services | 2014 |
| Darren Phillip Roofing Limited | Construction | 2014 |
| DAS Aviation Solutions Ltd. | Extraterritorial | 2014 |
| Dash Panda Ltd | Wholesale & retail | 2024 |
| Datacable Ltd | Information & communication | 1995 |
| Datacabling Installations Limited | Construction | 2003 |
| Dataffinity Ltd | Information & communication | 2023 |
| Dave Coward Management Limited | Professional & scientific | 2012 |
| David Barnes Tarmacadam Limited | Construction | 2013 |
| David Brunskill Windows Limited | Manufacturing | 2000 |
| David Peel Auto Electricians Limited | Wholesale & retail | 1984 |
| David Stansfield Limited | Professional & scientific | 2001 |
| David Wootton Ltd | Transport & logistics | 2011 |
| Davidson & SON Ltd | Real estate | 2023 |
| Davies Engineered Ltd | Professional & scientific | 2026 |
| Davies Properties (Keighley) Ltd | Real estate | 2012 |
| Davric Construction Projects Limited | Construction | 2007 |
| Dawsarm Creative Limited | Information & communication | 2006 |
| Day & Co Estate Agents Limited | Real estate | 2017 |
| Day & Co Mortgage Services Limited | Financial services | 2019 |
| DB Property Ventures Ltd | Real estate | 2026 |
| Db’S Gym Ltd | Arts & recreation | 2024 |
| DCP Project Partner Ltd | Information & communication | 2025 |
| DD Diesel Services Limited | Wholesale & retail | 2014 |
| DE Anima Consulting Ltd | Information & communication | 2010 |
| De-Cafe Limited | Hospitality | 2011 |
| Dead Fit Ltd | Other services | 2025 |
| Dealonic Limited | Wholesale & retail | 2024 |
| Debbys Ltd | Health & social care | 2022 |
| Deep Pressure Touch Ltd | Other services | 2024 |
| Deerstone Holidays Limited | Hospitality | 2021 |
| Delachique Cosmetics Ltd | Other services | 2016 |
| Delachique Limited | Other services | 2016 |
| Deli 786 Ltd | Hospitality | 2019 |
| Deli Lite Ltd | Hospitality | 2024 |
| Deli Munch Box Limited | Hospitality | 2022 |
| Deli Touch Shack Ltd | Hospitality | 2022 |
| Deli Touch(Victoria) Ltd | Hospitality | 2021 |
| Delicious Planet Limited | Hospitality | 2020 |
| Deliverace Logistics Ltd | Transport & logistics | 2026 |
| Dellaverde Ltd | Professional & scientific | 2025 |
| Delta Transport Services Ltd | Transport & logistics | 2022 |
| Deluxe’S Flooring Ltd | Wholesale & retail | 2025 |
| Denby & Bennett Complete Construction Services Limited | Construction | 2023 |
| Denholme Management Company Limited | Administrative & support | 2007 |
| Denholme Storage & Recovery Limited | Transport & logistics | 2014 |
| Dennis Baldwin Industries Ltd | Manufacturing | 2015 |
| Dennis Gillson & SON (Haworth) Limited | Mining & quarrying | 1975 |
| Dentalogix Services Ltd | Health & social care | 2021 |
| DES Kostume Ltd | Manufacturing | 2024 |
| DES Pickard & Sons Ltd | Agriculture & fishing | 2004 |
| Desair Ltd | Energy | 2025 |
| Desert Nomad Studios Limited | Information & communication | 2018 |
| Design and IT Ltd | Information & communication | 2011 |
| Design Box Consulting Engineers UK Ltd | Professional & scientific | 2024 |
| Design by JO BEE Ltd | Professional & scientific | 2016 |
| Design House Mouldings Limited | Construction | 1998 |
| Designer Reptiles Ltd | Wholesale & retail | 2022 |
| Designer Skin Clinic Ltd | Health & social care | 2018 |
| Designs IA Ltd | Professional & scientific | 2024 |
| Desserts Bar Ltd | Hospitality | 2023 |
| Desserts by Azeems Ltd | Wholesale & retail | 2025 |
| Destination Travel Agents Limited | Administrative & support | 2012 |
| Detailing HQ Limited | Administrative & support | 2025 |
| Devlin & Booth Ltd | Construction | 2020 |
| Devonshire Gardens Care Home Limited | Health & social care | 2025 |
| Devonshire Vision Limited | Health & social care | 2025 |
| Dewhurst Caravans Limited | Wholesale & retail | 2018 |
| DHA Landscapes and Groundworks Ltd | Construction | 2021 |
| Dhcs Newco Limited | Financial services | 2022 |
| Diam Systems Ltd | Information & communication | 2025 |
| Diamond Developments (Ilkley) Limited | Construction | 2025 |