| D&L Resources Ltd | Construction | 2018 |
| D-Side Cafe Ltd | Hospitality | 2025 |
| D. & C. Electrical Services Limited | Construction | 2003 |
| D. Baker Design Ltd | Construction | 2002 |
| D. M C. Plastering (NW) Ltd | Construction | 2016 |
| D.B. Mirrors Ltd | Wholesale & retail | 2011 |
| D.M. Jones & Associates Limited | Administrative & support | 2003 |
| D.P. & M. Construction Limited | Construction | 1985 |
| D.S.T. Pattern and Engineering Company Limited | Extraterritorial | 1985 |
| D.Saeedi Property Ltd | Real estate | 2026 |
| D2U (UK) LLP | | 2009 |
| DAB Cars Ltd | Wholesale & retail | 2022 |
| DAB Projects Limited | Professional & scientific | 2018 |
| Dachs Engineering Ltd | Professional & scientific | 2019 |
| Dadro Ltd | Transport & logistics | 2021 |
| Dajl Property Services Ltd | Real estate | 2025 |
| DAK Small Business Support Services Limited | Administrative & support | 2015 |
| Dakivina Limited | Wholesale & retail | 2012 |
| Dale Acquisitions Ltd | Real estate | 2008 |
| Dale Fleet Logistics Limited | Transport & logistics | 2014 |
| Damian Lees Tailored Fitness Ltd | Arts & recreation | 2022 |
| Dammantel Limited | Professional & scientific | 2025 |
| DAN Kelsall Ltd | Professional & scientific | 2024 |
| Dance Like a Mother Ltd | Other services | 2022 |
| Dancon Building Limited | Financial services | 2018 |
| Danesbridge Limited | Real estate | 1997 |
| Daniel Garnett Electrical Ltd | Construction | 2016 |
| Daniel Griffiths Electrical Limited | Construction | 2015 |
| Daniel H KIM Ltd | Health & social care | 2023 |
| Danny Barber Ltd | Other services | 2025 |
| Danny Rose Consultancy Ltd | Financial services | 2023 |
| Dante's Surf Shack Limited | Real estate | 2017 |
| DAO Roofing & Building Ltd | Construction | 2020 |
| DAR Security Ltd | Administrative & support | 2024 |
| Darmel Construction Limited | Real estate | 2014 |
| Darmel Developments Ltd | Construction | 2023 |
| Darmel Group Ltd | Construction | 2024 |
| Darren Atkins Project Management Limited | Professional & scientific | 2016 |
| DAS Chiropractic Limited | Health & social care | 2018 |
| DAS Fire Limited | Administrative & support | 2006 |
| Dash Creative Services Limited | Information & communication | 2003 |
| Data Clinic Limited | Information & communication | 2002 |
| Datathena Ltd | Professional & scientific | 2020 |
| Daubney Hotel & PUB Limited | Hospitality | 2025 |
| Daubney Investments Limited | Real estate | 2020 |
| Dauh Ltd | Wholesale & retail | 2022 |
| Davanex Ltd | Professional & scientific | 2005 |
| Dave Leonard Photography Ltd | Manufacturing | 2024 |
| Davenport Site Services Ltd | Construction | 2025 |
| Davenports Associates LLP | | 2025 |
| Davenports Connect Limited | Administrative & support | 2018 |
| Davenports Foundation | Other services | 2019 |
| Davenports Group Limited | Professional & scientific | 2012 |
| Davenports Holdings Limited | Real estate | 2019 |
| Davenports Holdings One Limited | Real estate | 2022 |
| Davenports Legal Limited | Financial services | 2019 |
| David Alan Property Searches Limited | Information & communication | 2021 |
| David Healy Promotions Limited | Arts & recreation | 2007 |
| Davies Carrington Limited | Financial services | 2003 |
| Davies, Millward and Sons Ltd | Real estate | 2025 |
| Davis Curtains Limited | Manufacturing | 2006 |
| Dawson Berkeley & Partners Limited | Professional & scientific | 1977 |
| Dawson Foundation Engineering Ltd | Professional & scientific | 2023 |
| Dawson Garages Limited | Wholesale & retail | 2012 |
| Dawson Lindsey Ltd | Professional & scientific | 2024 |
| Daxel Solutions Limited | Extraterritorial | 2021 |
| Daxfield Limited | Extraterritorial | 2021 |
| DB Air Conditioning & Mechanical Services Limited | Manufacturing | 2015 |
| DB Civils Management Ltd | Professional & scientific | 2018 |
| DB Engineering Projects NW Ltd | Construction | 2012 |
| DB Solutions Group Ltd | Construction | 2016 |
| DB65 Properties Ltd | Real estate | 2025 |
| Dbim Limited | Professional & scientific | 2025 |
| DBN Properties Ltd | Real estate | 2018 |
| DBT Ventures Limited | Professional & scientific | 2024 |
| DBX Acoustics Ltd | Professional & scientific | 2013 |
| DCJ Property and Development Ltd | Real estate | 2024 |
| DCM Property Development Ltd | Construction | 2025 |
| Dcrm Trade Ltd | Wholesale & retail | 2024 |
| DCS Extreme Cleaning Services Ltd | Administrative & support | 2022 |
| DCS Extreme Cleaning Specialist Ltd | Administrative & support | 2026 |
| DCS Prosthetics Ltd | Manufacturing | 2026 |
| DD Exhibitions Limited | Administrative & support | 2009 |
| DDD Projects Limited | Wholesale & retail | 2025 |
| Ddjacobs Ltd | Real estate | 2019 |
| DDM Industries Limited | Construction | 2025 |
| DDS Design Consult Ltd | Professional & scientific | 2018 |
| DE Management Services Limited | Health & social care | 2019 |
| DE Properties Investments Ltd | Real estate | 2023 |
| Deacon's Retreat Ltd | Hospitality | 2025 |
| Deals Breaker Limited | Wholesale & retail | 2023 |
| Dean Barlow Sports Floors Ltd | Other services | 2019 |
| Dean Hunt Plumbing & Heating Services Ltd | Construction | 2019 |
| Dean Moriarty Consultancy Ltd | Professional & scientific | 2011 |
| Deane Catering Limited | Hospitality | 2022 |
| Deanfield Property Limited | Real estate | 2015 |
| Deborah Dalley and Associates Ltd | Professional & scientific | 2004 |
| Decent Trading Ltd | Wholesale & retail | 2019 |
| Decor 8 (Northern) Limited | Wholesale & retail | 2000 |
| Decor Effects Ltd | Construction | 2016 |