| D.M.Keith (CA) Limited | Wholesale & retail | 1976 |
| D.M.Keith (WE) Limited | Professional & scientific | 1963 |
| D.M.S. Mechanical Services Limited | | 1979 |
| D.North & Co.Limited | Professional & scientific | 1961 |
| D.O. Capital & Consulting Ltd | Information & communication | 2023 |
| D.R Bricklaying Ltd | Construction | 2024 |
| D.Ryan Civil Engineering Ltd | Construction | 2007 |
| D.S Diamond Service Ltd | Transport & logistics | 2025 |
| D.S.A. Translog Ltd | Transport & logistics | 2019 |
| D.S.Devonport Consulting Ltd | Extraterritorial | 2023 |
| D.Secka & SON Ltd | Construction | 2016 |
| D.T.H Trinity Orthodox Church | Other services | 2018 |
| D.V.D Constrcut Ltd | Construction | 2025 |
| D1 BFD Trading Limited | Other services | 2025 |
| D1 Electrical Ltd | Construction | 2010 |
| D1 Holdings Limited | Real estate | 2025 |
| D1-JOLIBA Properties Ltd | Real estate | 2023 |
| D10S Holding Ltd | Financial services | 2024 |
| D2-JOLIBA Properties Ltd | Real estate | 2023 |
| D2B Maintenance Ltd | Construction | 2023 |
| D2BROTHERZZ Ltd | Transport & logistics | 2025 |
| D2P Properties Ltd | Real estate | 2026 |
| D2R Ltd | Manufacturing | 2025 |
| D2S Build Ltd | Construction | 2025 |
| D3 SEJ Ltd | Real estate | 2021 |
| D818 Limited | Financial services | 2026 |
| D:Side | Education | 2010 |
| DA Applausus Ltd | Manufacturing | 2025 |
| DA Euro Retail Ltd | Wholesale & retail | 2019 |
| DA JI DA Ltd | Hospitality | 2024 |
| DA Mark Consulting Ltd | Information & communication | 2021 |
| DA Properties & Investment Ltd | Real estate | 2025 |
| DA Rocchio Ristorante Italiano Ltd | Hospitality | 2007 |
| DA Shellery Ltd | Arts & recreation | 2024 |
| DA Silva S Joinery Ltd | Construction | 2025 |
| DA Vito Leeds Limited | Hospitality | 2020 |
| Daad Properties Ltd | Real estate | 2003 |
| Daalitech Ltd | Information & communication | 2024 |
| Daawat Leeds Ltd | Hospitality | 2022 |
| Daaz and Goodman Ltd | Professional & scientific | 2023 |
| DAB Brands Ltd | Wholesale & retail | 2017 |
| DAB Management Services Limited | Construction | 2015 |
| DAB Space Limited | Real estate | 2025 |
| Dabangg Hospitality Group Ltd | Hospitality | 2018 |
| Dabenji Healthcare Services Ltd | Health & social care | 2019 |
| Dabville Limited | Manufacturing | 1980 |
| DAC Couriers Ltd | Transport & logistics | 2022 |
| DAC Environmental Solutions Limited | Construction | 2018 |
| Dacama Property Group Limited | Real estate | 2018 |
| Dacantus Restaurants Limited | Hospitality | 2017 |
| Dacian Ltd | Transport & logistics | 2019 |
| Dacre Commercial Services Limited | Arts & recreation | 2022 |
| Dada Education Global Limited | Education | 2018 |
| DAE Logistic Limited | Transport & logistics | 2016 |
| Daebynali Ltd | Health & social care | 2014 |
| Daedalus IT Solutions Limited | Information & communication | 2022 |
| Daefa Foods Limited | Wholesale & retail | 2025 |
| DAESIA7 Ltd | Real estate | 2024 |
| Daffkeys Limited | Wholesale & retail | 2025 |
| Daffodil Guest House Ltd | Hospitality | 2021 |
| DAG Consultants Ltd. | Professional & scientific | 2021 |
| Daga Projects Limited | Construction | 2019 |
| Dagless Electrical Ltd | Administrative & support | 2019 |
| DAH FP Ltd | Professional & scientific | 2017 |
| Dahen Carpenters Limited | Manufacturing | 2025 |
| Dahlia Stroud Ltd | Professional & scientific | 2023 |
| Dahri Consulting Ltd | Administrative & support | 2022 |
| Daichong Limited | Wholesale & retail | 2023 |
| Daily Bread Limited | Hospitality | 1986 |
| Daily Grind Coffee Co (North) Ltd | Hospitality | 2026 |
| Daily Local Store 393 Ltd | Wholesale & retail | 2024 |
| Daily Media Limited | Professional & scientific | 2022 |
| Daily Shawarma Ltd | Hospitality | 2025 |
| Daimonds Cleaning Limited | Administrative & support | 2025 |
| Dainius Building Ltd | Construction | 2025 |
| Daisy Chain (Leeds) Limited | Wholesale & retail | 2003 |
| Daisy Chain Childcare (Adel) Limited | Education | 2003 |
| Daisy Chain Childcare (Pre-School) Ltd | Education | 2014 |
| Daisy Chain Childcare Limited | Education | 2001 |
| Daisy Chain Holdings Limited | Extraterritorial | 2009 |
| Daisy Cherry Limited | Construction | 2020 |
| Daisy House Training Limited | Education | 2025 |
| Daisy Inn (Bramley) Ltd | Hospitality | 2018 |
| Daja Consulting Services Limited | Professional & scientific | 2021 |
| Dajoto LLP | | 2024 |
| Dajvm Ltd | Wholesale & retail | 2022 |
| DAK Freight Ltd | Wholesale & retail | 2020 |
| Dakla Group Ltd | Financial services | 2025 |
| Dakla Residential Ltd | Real estate | 2025 |
| Dako Transport Ltd. | Transport & logistics | 2019 |
| Dakoda LLP | | 2023 |
| Dakota Bidco Limited | Financial services | 2024 |
| Daksh Limited | Information & communication | 2011 |
| Daky Electrics & Decoration Limited | Construction | 2022 |
| Dalal & Sons Ltd | Wholesale & retail | 2018 |
| Dalby Offshore Services Limited | Professional & scientific | 2007 |
| Dale Comm Aerials Limited | Information & communication | 2021 |
| Dale Opticians Limited | Wholesale & retail | 2022 |
| Dale Properties (Yorkshire) Limited | Real estate | 2005 |
| Dalehead Holdings Ltd | Financial services | 2026 |