| DJH Care Consultancy Ltd | Professional & scientific | 2023 |
| DJH Consultancy Limited | Professional & scientific | 2023 |
| DJP Project Services Ltd | Professional & scientific | 2017 |
| Djrr Build Limited | Construction | 2024 |
| DJS Building Supplies Ltd | Wholesale & retail | 2023 |
| DJS Properties Bedford Ltd | Households | 2025 |
| Djsl Civils Ltd | Construction | 2023 |
| DJT Surfacing Ltd | Construction | 2011 |
| Djwb & Co Business Advisors Ltd | Professional & scientific | 2020 |
| DK Dermatology Services Ltd | Health & social care | 2015 |
| DKA Consulting Ltd | Information & communication | 2025 |
| DL Capital Limited | Professional & scientific | 2020 |
| DL Garden Services Ltd | Administrative & support | 2017 |
| DL Kitchen Design Ltd | Construction | 2023 |
| Dlight Investments Ltd | Hospitality | 2025 |
| DLK Real Estate Ltd | Real estate | 2025 |
| DLK Ventures Ltd | Real estate | 2020 |
| DLL Business Consultants Ltd | Professional & scientific | 2020 |
| DLP (Consulting Group) Limited | Professional & scientific | 1996 |
| DLP Corporate Trustee Limited | Financial services | 2022 |
| DLP Planning Limited | Professional & scientific | 1991 |
| DLP Training Ltd | Other services | 2013 |
| DLS ONC Care Ltd | Health & social care | 2023 |
| DLT Properties Limited | Real estate | 2015 |
| DM Finds Ltd | Wholesale & retail | 2025 |
| DM Fitness Trading AS Fitter Body Ladies Bedford Ltd | Arts & recreation | 2024 |
| DM Services (Barton) Limited | Professional & scientific | 2025 |
| DMC Roofing Limited | Construction | 2016 |
| Dmcg Solutions Limited | Information & communication | 2023 |
| DMH Holdings Limited | Real estate | 2023 |
| DMH Legal Services Ltd | Professional & scientific | 2023 |
| DMR Ventilation Ltd | Construction | 2024 |
| DMS Escalators Ltd | Professional & scientific | 2019 |
| DMS Ventures Ltd | Real estate | 2022 |
| DNA Electrical Testing Limited | Construction | 2007 |
| DNA Lighting Protection Services Limited | Professional & scientific | 2024 |
| DNA Sports Therapy Ltd | Arts & recreation | 2019 |
| DND Drylining Ltd | Construction | 2023 |
| DNL Corporate Services Ltd | Administrative & support | 2024 |
| DNM Solutions Limited | Information & communication | 2015 |
| DNP Investments Limited | Construction | 2010 |
| Dntrans Ltd | Transport & logistics | 2021 |
| Dockguard Holdings Limited | Manufacturing | 2018 |
| Docsafe Limited | Information & communication | 2013 |
| Doctor Dyson Limited | Manufacturing | 2020 |
| Dodsworth Investments Limited | Real estate | 2022 |
| Dogzacademy Ltd | Other services | 2022 |
| Dogzaloud Ltd | Other services | 2022 |
| Doho Koco Limited | Real estate | 2023 |
| DOI Limited | Real estate | 2022 |
| Doiban Ltd | Construction | 2022 |
| Doja's Services Ltd | Health & social care | 2023 |
| Dolemore Limited | Extraterritorial | 2013 |
| Dolly Curls Ltd | Other services | 2022 |
| Dolly Derivatives Ltd | Real estate | 2020 |
| Dolly's Barn Ltd | Wholesale & retail | 2019 |
| DOM Polski Events Ltd | Hospitality | 2021 |
| Dom's Hair Design Ltd | Other services | 2019 |
| DOM2 Ltd | Hospitality | 2018 |
| Domi Car Sales Limited | Wholesale & retail | 2024 |
| Domi Transport Ltd | Transport & logistics | 2014 |
| Dominic Mills Ltd | Professional & scientific | 2012 |
| Dominic Retail Limited | Wholesale & retail | 2023 |
| Domsil Care & Support Limited | Health & social care | 2024 |
| Domu Holdings Limited | Real estate | 2025 |
| Domus Investire Ltd | Real estate | 2015 |
| DON Dario Ltd | Hospitality | 2025 |
| DON Scott Travel Ltd | Transport & logistics | 2021 |
| Donald Gilmour Consulting Limited | Information & communication | 2012 |
| Donald Morrison Consultancy Limited | Professional & scientific | 2009 |
| Dont Deliver Late Ltd | Transport & logistics | 2011 |
| Donté Killion Media Ltd | Professional & scientific | 2018 |
| Doodlecards Group Limited | Professional & scientific | 2020 |
| Doodlecards.Com Limited | Manufacturing | 2021 |
| Doon Court Residents Association Limited | Real estate | 2005 |
| Door Step Kempston Ltd | Hospitality | 2025 |
| Door Studio Online Ltd | Manufacturing | 2026 |
| Doorstep Distribution London Ltd | Transport & logistics | 2010 |
| Doorstepdolci Delights Ltd | Hospitality | 2025 |
| Dora Trans Ltd | Transport & logistics | 2025 |
| Dorban Investments Limited | Real estate | 2015 |
| Dormans Photo Imaging Limited | Wholesale & retail | 1995 |
| DOROTRANS87 Ltd | Transport & logistics | 2026 |
| Dorset Associates Ltd | Professional & scientific | 2021 |
| Doru Drive Ltd | Transport & logistics | 2019 |
| Dosanjh Property Group Limited | Financial services | 2017 |
| Dosl Finance Limited | Financial services | 2025 |
| Dosl Investments Limited | Real estate | 2017 |
| Dosl Limited | Information & communication | 2010 |
| Dosti Limited | Hospitality | 2009 |
| DOT 2 DOT Apartments Ltd | Hospitality | 2026 |
| DOT Hosting Ltd | Information & communication | 2014 |
| DOT2DOT Holdings Ltd | Real estate | 2026 |
| DOT2DOT Property Services Ltd | Construction | 2026 |
| Double 0 Motorcycles Limited | Wholesale & retail | 2014 |
| Double Deal Property Ltd | Real estate | 2024 |
| Double Swan Letting Agents Limited | Real estate | 2026 |
| Double Take Moments Ltd | Professional & scientific | 2019 |
| Double Vision Health Club Ltd | Professional & scientific | 2012 |
| DOUBLE4MOTORS Limited | Wholesale & retail | 2017 |