| Diglis Water Estate Management Company Limited | Extraterritorial | 2006 |
| Diligent Business Consulting Limited | Professional & scientific | 2009 |
| Diligent Developments (UK) Limited | Construction | 2014 |
| Diligent Norfolk Lettings Limited | Real estate | 2024 |
| Dillie Keane Ltd | Arts & recreation | 2013 |
| Dinny-Sqrd Ltd | Arts & recreation | 2022 |
| Diplomat Chauffeurs Bucks Ltd | Transport & logistics | 2026 |
| Direct Logistic Services Ltd | Transport & logistics | 2022 |
| Direct Touch Ministries International Limited | Other services | 2005 |
| Directors & Professionals Limited | Financial services | 2000 |
| Direktek Ltd | Wholesale & retail | 1991 |
| Discount Sign & Display Ltd | Manufacturing | 2018 |
| Discount Sign & Print Limited | Manufacturing | 2023 |
| Discount Tyres & Repair Centre Ltd | Wholesale & retail | 2019 |
| Discount Tyrez Ltd | Wholesale & retail | 2018 |
| Disha Property Management Ltd | Real estate | 2020 |
| Disrptr Ltd | Professional & scientific | 2024 |
| Disrupter Apparel Limited | Wholesale & retail | 2018 |
| Distinctive Technologies Ltd | Information & communication | 2024 |
| Distora Limited | Information & communication | 2023 |
| Ditto Estates Limited | Real estate | 2025 |
| Divine Premier UK Ltd | Wholesale & retail | 2021 |
| Divine Soul Care Ltd | Administrative & support | 2017 |
| DIY Framing Limited | Wholesale & retail | 2002 |
| DJ Sports Ltd | Education | 2018 |
| Djangos Grill Ltd | Hospitality | 2024 |
| DJB Marketing Limited | Wholesale & retail | 2008 |
| DJC Architecture Limited | Professional & scientific | 2025 |
| DJC Integration Ltd | Professional & scientific | 2021 |
| DJC Operations Limited | Professional & scientific | 2015 |
| DJD Consultancy(Hw) Ltd | Administrative & support | 2017 |
| DJM Prime Ltd | Real estate | 2025 |
| Djtc Cakes 4 Ltd | Manufacturing | 2021 |
| Djtc Sweets Ltd | Hospitality | 2026 |
| DJW Film Services Ltd | Transport & logistics | 2024 |
| DK Connects Ltd | Professional & scientific | 2025 |
| DK Consulting Limited | Professional & scientific | 2022 |
| Dkdk Limited | Wholesale & retail | 2018 |
| Dkfire Ltd | Professional & scientific | 2025 |
| Dksn Ltd | Information & communication | 2016 |
| DL Auto Repairs Ltd | Wholesale & retail | 2021 |
| DL Auto Tech Limited | Wholesale & retail | 2026 |
| DL Davies Limited | Professional & scientific | 2013 |
| Dlala Studios Ltd | Administrative & support | 2012 |
| DM Communications Engineering Limited | Information & communication | 2017 |
| DM Developers Limited | Construction | 2023 |
| DM Direct Construction Ltd | Construction | 2025 |
| DMH Planning Limited | Professional & scientific | 2021 |
| DMJ Sports Limited | Education | 2018 |
| DNA Autos Ltd | Wholesale & retail | 2014 |
| DNA Money Limited | Financial services | 2011 |
| DNH Building Services Limited | Construction | 2017 |
| DNY Online Ltd | Wholesale & retail | 2026 |
| Dobrin Ltd | Administrative & support | 2016 |
| Docdata Ltd | Professional & scientific | 2023 |
| Doctor Wash Ltd | Administrative & support | 2024 |
| Dog BOY Ltd | Information & communication | 2011 |
| Dogs About Town Limited | Administrative & support | 2010 |
| Doherty Construction (UK) Limited | Construction | 2016 |
| Doherty Lettings Limited | Real estate | 2019 |
| Doing Good Through Coffee Snobs CIC | Hospitality | 2023 |
| Dolce Vita F a Limited | Hospitality | 2019 |
| Dolce Vita Restaurant Limited | Hospitality | 2018 |
| Dolittle Precision Ltd | Wholesale & retail | 2021 |
| Dolly Creation Ltd | Wholesale & retail | 2023 |
| Dolphins Builders Ltd | Construction | 2021 |
| Dols Solutions Limited | Other services | 2025 |
| Domestic Energy Assesors Ltd | Professional & scientific | 2024 |
| Domestic Lift Services Limited | Construction | 2001 |
| Domus Alpha Ltd | Real estate | 2019 |
| Domus Awan Property Limited | Real estate | 2025 |
| Donnybrook House (High Wycombe) Limited | Real estate | 1973 |
| Doodles and Calm Limited | Wholesale & retail | 2022 |
| Door 2 Door HW Ltd | Transport & logistics | 2018 |
| Doozy Distrubution Ltd | Wholesale & retail | 2025 |
| Dopiate Construction Limited | Construction | 2021 |
| Dora Properties Ltd | Real estate | 2024 |
| Doran Drives and Landscaping Limited | Administrative & support | 2022 |
| Dorel Cars Sale Ltd | Wholesale & retail | 2025 |
| Dorian Bar Company Limited | Hospitality | 2025 |
| Dorian Property Holdings Limited | Hospitality | 2025 |
| Dormant Nominees One Limited | Extraterritorial | 1958 |
| Dormant Nominees Two Limited | Extraterritorial | 1973 |
| Dormouse Designs Ltd | Arts & recreation | 2017 |
| DOT 2 DOT Courier Limited | Transport & logistics | 2023 |
| Double B Effects Ltd | Information & communication | 2024 |
| Dovecote Property Solutions Limited | Real estate | 2020 |
| Dovetail Accounting Limited | Professional & scientific | 2025 |
| Dower Barn Ltd | Real estate | 2020 |
| Dowerfield Limited | Real estate | 1979 |
| Downley Dairy Ltd | Wholesale & retail | 2025 |
| Downright Ltd | Information & communication | 2026 |
| Doxzoo Limited | Information & communication | 2013 |
| DP Care Group Ltd | Health & social care | 2014 |
| DPA Design Limited | Professional & scientific | 2025 |
| DPF Emissions Expert Ltd | Wholesale & retail | 2021 |
| DPI Management Limited | Extraterritorial | 2021 |
| DPX Ventures LLP | | 2019 |
| DR Amna Educational Psychology Service Ltd | Education | 2021 |
| DR Ashley M Croft MD PHD Data Services Limited | Information & communication | 2023 |