| Digitax Group Limited | Information & communication | 2021 |
| Digiterz Ltd | Information & communication | 2019 |
| Digitify Ltd | Information & communication | 2016 |
| Digitn Ltd | Information & communication | 2021 |
| Dignity in Deen Limited | Wholesale & retail | 2016 |
| DIL Diya Ltd | Administrative & support | 2026 |
| DIL Services CON Ltd | Construction | 2026 |
| Dildar Executives Ltd | Transport & logistics | 2026 |
| Diligent Business Services Limited | Administrative & support | 2018 |
| Diligent Motors Ltd | Wholesale & retail | 2024 |
| Diligent Services Ltd | Administrative & support | 2020 |
| Dill Holding Group Ltd | Transport & logistics | 2026 |
| Dilmoor Estates Limited | Hospitality | 2000 |
| Dils Civil Engineering Ltd | Construction | 2022 |
| Dils Plumbing and Heating Services Ltd | Construction | 2021 |
| Dilston Tech Solutions Ltd | Professional & scientific | 2026 |
| Dimetra Ltd | Hospitality | 2019 |
| Dimore Limited | Professional & scientific | 2008 |
| Dimpy Construction Ltd | Construction | 2023 |
| Dimpy Constructions & Double Glazing Ltd | Construction | 2023 |
| DIN Food Group Ltd | Manufacturing | 2020 |
| Dina Construction Ltd | Construction | 2017 |
| Dina Kashap London Limited | Manufacturing | 2017 |
| Dinc A.F. Ltd | Hospitality | 2014 |
| Dine&Fly Ltd | Hospitality | 2026 |
| Dini Solutions Limited | Information & communication | 2013 |
| Dios Investments Ltd | Real estate | 2024 |
| Diplomat Transport Solutions Limited | Administrative & support | 2009 |
| Dippingwell Court Management Company Limited | Households | 2019 |
| Direct Assist Accountants Ltd | Professional & scientific | 2017 |
| Direct Care Solutions Limited | Health & social care | 2023 |
| Direct Home Appliances Ltd | Wholesale & retail | 2022 |
| Direct Recruitment London Limited | Construction | 2022 |
| Direct to US 22 Ltd | Administrative & support | 2026 |
| Direct Trade Windows Limited | Manufacturing | 2001 |
| Direct Transfers Ltd | Transport & logistics | 2023 |
| Directfly UK Ltd | Manufacturing | 2025 |
| Discexpert Ltd | Wholesale & retail | 2025 |
| Discount Tyre Centre Ltd | Manufacturing | 2019 |
| Discounted Price Limited | Wholesale & retail | 2017 |
| DISECT360 Solutions Ltd | Information & communication | 2022 |
| Disha and Son's Property Management and Development Limited | Real estate | 2024 |
| Disha Realty Ltd | Real estate | 2024 |
| Disinfectó Purus Ltd | Administrative & support | 2025 |
| Dispatch Cleaning Services Limited | Administrative & support | 2025 |
| Dissidents United CIC | Other services | 2025 |
| Distinctive Music Ltd | Arts & recreation | 2019 |
| Distinctive Production Ltd | Arts & recreation | 2019 |
| Ditton Manor Events and Hospitality Ltd | Wholesale & retail | 2015 |
| Ditton Park Management Company Limited | Real estate | 2004 |
| DIV Construction Limited | Construction | 2023 |
| Divinee Services Limited | Hospitality | 2015 |
| Divisha Properties Ltd | Real estate | 2024 |
| Divyansh Group International Limited | Real estate | 2024 |
| Diwaan Ltd | Hospitality | 2024 |
| Djay Properties Limited | Real estate | 2020 |
| DJD Advisory Limited | Professional & scientific | 2018 |
| DJD Projects Ltd | Construction | 2025 |
| Djjah Ltd | Arts & recreation | 2025 |
| Djtc Cakes 3 Ltd | Manufacturing | 2019 |
| DK Real Estates Limited | Real estate | 2024 |
| DK Transport(Uk) Ltd | Transport & logistics | 2025 |
| DKS Infra Realty Ltd | Construction | 2023 |
| Dksc Building Services Ltd | Construction | 2021 |
| DKT Portfolio Ltd | Real estate | 2021 |
| DLB 100 Limited | Manufacturing | 2023 |
| DLT Distributions Ltd | Wholesale & retail | 2026 |
| DM Accounts Ltd | Professional & scientific | 2011 |
| DM Alpha Limited | Administrative & support | 2026 |
| DM Fleet Limited | Real estate | 2022 |
| DM Gaba Superstore Ltd | Wholesale & retail | 2023 |
| DM Trans Ltd | Transport & logistics | 2015 |
| DMB Building Construction Ltd | Construction | 2024 |
| DMC Infra Limited | Construction | 2026 |
| DMH Suppliers Limited | Wholesale & retail | 2026 |
| DMI Development Limited | Professional & scientific | 2012 |
| DMK Management Services Ltd | Hospitality | 2018 |
| DMU Properties Limited | Construction | 2026 |
| DN Trading Limited | Wholesale & retail | 2005 |
| DNG & Co UK Ltd | Wholesale & retail | 2019 |
| DNH Global Ltd | Wholesale & retail | 2025 |
| DNM Removals Limited | Transport & logistics | 2023 |
| DO IT Easy Ltd | Wholesale & retail | 2022 |
| Doaba Brew Limited | Wholesale & retail | 2024 |
| Doaba Catering Limited | Hospitality | 2025 |
| Doaba Truck Repair Ltd | Wholesale & retail | 2025 |
| DOB Interiors Limited | Construction | 2022 |
| Dobre Building Ltd | Other services | 2025 |
| Doctor Heat Ltd | Construction | 2023 |
| Doctor Tech Ltd | Information & communication | 2018 |
| Doctors Megastore Ltd | Wholesale & retail | 2023 |
| Documentsservicesaga Limited | Professional & scientific | 2023 |
| Dodds Properties Limited | Real estate | 2011 |
| Dolce 1 Ltd | Hospitality | 2017 |
| Dolly Rose Solutions Ltd | Real estate | 2017 |
| Dolphin Cars & Couriers Limited | Transport & logistics | 2016 |
| Dolphin South East Holdings Ltd | Real estate | 2023 |
| Domdna Technologies Ltd | Information & communication | 2026 |
| Domestic Eco Services Ltd | Construction | 2024 |
| Domion Development Ltd | Construction | 2019 |