| Dknankani Property Ltd | Financial services | 2025 |
| Dk’S Dental Laboratory Ltd | Manufacturing | 2025 |
| DL Consultancy Services Ltd | Professional & scientific | 2025 |
| DL Designs (PCB) Ltd | Information & communication | 2003 |
| DLD Holdings Ltd | Real estate | 2017 |
| DM Heating Services Limited | Construction | 2009 |
| DM Lighting Ltd | Arts & recreation | 2015 |
| DMC7SETLIGHTING Ltd | Information & communication | 2017 |
| DMD Property Services Limited | Extraterritorial | 2021 |
| DMF Foster Care Ltd | Health & social care | 2025 |
| DMJ Project Consulting Limited | Professional & scientific | 2023 |
| Dmkw Limited | Real estate | 2022 |
| DN Build Ltd | Construction | 2026 |
| DN Technology Limited | Real estate | 2021 |
| DNA Krav Maga Ltd | Arts & recreation | 2025 |
| DNR Films Limited | Information & communication | 2002 |
| DO Nursing Services Ltd | Health & social care | 2012 |
| Doaba Renovations Ltd | Construction | 2024 |
| Docconnect UK Limited | Health & social care | 2025 |
| Dock Mart Ltd | Wholesale & retail | 2026 |
| Docucentric Holdings Limited | Extraterritorial | 2011 |
| Dolce Vita Chauffeurs Ltd | Transport & logistics | 2026 |
| Dolphin Haley Limited | Wholesale & retail | 2013 |
| Dolphin Wharf Holdings Limited | Wholesale & retail | 2024 |
| Domesticare Plus Ltd | Administrative & support | 2026 |
| Domina Logistic Ltd | Transport & logistics | 2021 |
| Dominik Ionut Ltd | Transport & logistics | 2023 |
| Dominion Court RTM Company Limited | Real estate | 2013 |
| Dominion Estates Ltd | Real estate | 2021 |
| DON Russell Accountancy Ltd | Professional & scientific | 2011 |
| Doncaster Rovers Football Club Limited | Professional & scientific | 1920 |
| Donce Limited | Wholesale & retail | 2013 |
| Dony Gift Products Ltd | Manufacturing | 2017 |
| Doorstep Bargains Ltd | Wholesale & retail | 2021 |
| Dores Properties Limited | Financial services | 2021 |
| Dorset & Eton Ltd | Wholesale & retail | 2026 |
| Dose of Matcha Ltd | Wholesale & retail | 2025 |
| Dots Architectural Services Limited | Other services | 2012 |
| Dots Property Ltd | Households | 2023 |
| Doubledrive Limited | Wholesale & retail | 1983 |
| Dowell Enterprises (UK) Limited | Wholesale & retail | 2000 |
| Downley Court Management Company Limited | Households | 1991 |
| Downley Heights RTM Company Limited | Real estate | 2005 |
| Doyel Spice Limited | Hospitality | 2015 |
| Dpatino Care Ltd | Health & social care | 2015 |
| Dpsd Services Limited | Water & waste | 2025 |
| DPT Consultancy Limited | Information & communication | 2021 |
| DR Fone Recycling Ltd | Extraterritorial | 2015 |
| DR Lava Clinic Limited | Administrative & support | 2018 |
| DR Rina Bajaj Ltd | Other services | 2017 |
| DR Sun Limited | Information & communication | 2017 |
| Draconis Properties Limited | Households | 2024 |
| Dragon Cars Custom Ltd | Administrative & support | 2023 |
| Dragon Union Limited | Transport & logistics | 2026 |
| Dragonfire Technologies Limited | Information & communication | 2025 |
| Dragos.Fox Ltd | Transport & logistics | 2018 |
| Drake Court (Rayners Lane) Limited | Real estate | 1996 |
| Dream Big Investments Limited | Real estate | 2017 |
| Dream House Construction 29 Limited | Construction | 2025 |
| Dream Sushi Boom Ltd | Hospitality | 2024 |
| Dream Works Agency Ltd | Administrative & support | 2022 |
| Dreamland Projects Limited | Construction | 2025 |
| Dreamolive Ltd | Wholesale & retail | 2023 |
| Dreamrun Limited | Professional & scientific | 2012 |
| Dreamz Transport Ltd | Transport & logistics | 2025 |
| Drekan Tactical Ltd | Wholesale & retail | 2025 |
| Dressy Ltd | Wholesale & retail | 2019 |
| Drift Agency Ltd | Professional & scientific | 2021 |
| Drink R-Us Limited | Wholesale & retail | 2018 |
| Drinkvyre Ltd | Wholesale & retail | 2026 |
| Driv Ltd | Wholesale & retail | 2024 |
| Drive (Langley) Management Company Limited(The) | Real estate | 1986 |
| Drive V FUN Limited | Arts & recreation | 2025 |
| Driveline Consultancy Ltd | Information & communication | 2025 |
| Drivology Driving School Ltd | Education | 2022 |
| Drop & Go Couriers Ltd | Transport & logistics | 2026 |
| Drymach Ltd | Administrative & support | 2015 |
| DS Financial Solutions Ltd | Professional & scientific | 2019 |
| DS Residential Holdings Ltd | Real estate | 2019 |
| DS Strategic Consulting Ltd | Professional & scientific | 2025 |
| Dsa-Uk Limited | Professional & scientific | 2022 |
| Dser Veterinary Services Limited | Professional & scientific | 2020 |
| Dsquared LDN Limited | Administrative & support | 2019 |
| Dsss Global Solutions Ltd | Professional & scientific | 2025 |
| DST Fabrications Ltd | Manufacturing | 2013 |
| DT Civil Projects Ltd | Professional & scientific | 2014 |
| DT10ATTIRE Ltd | Wholesale & retail | 2024 |
| Dtdts Ltd | Transport & logistics | 2018 |
| DTE Premium Detailing Ltd | Wholesale & retail | 2026 |
| DTM Construct Services Ltd | Construction | 2026 |
| DTS Real Estate Ltd | Construction | 2021 |
| DUA Holly (Abbey) Limited | Financial services | 2024 |
| DUA Holly Limited | Hospitality | 2023 |
| Dubai Crafted Ltd | Manufacturing | 2025 |
| Dudden Hill, Willesden Management Company Limited | Households | 2026 |
| Dudley Retail Ltd | Real estate | 2024 |
| Dumula Limited | Information & communication | 2013 |
| Dunhill Management Group Ltd | Financial services | 2023 |
| Dunhill Management Holding Ltd | Financial services | 2023 |
| Dunstans Road Management Company Limited | Hospitality | 1999 |