| DGH Roofing Limited | Construction | 2014 |
| Dhaka House Group Ltd | Real estate | 2026 |
| Dhaka Kitchen Group Ltd | Hospitality | 2026 |
| Dhaka Soft Group Ltd | Health & social care | 2026 |
| Dharani Beauty Ltd | Other services | 2025 |
| Dharani Catering Ltd | Other services | 2025 |
| Dhruva Global Ltd | Wholesale & retail | 2025 |
| Diakob Enterprises Ltd | Professional & scientific | 2023 |
| Diamond AC Limited | Construction | 2021 |
| Diamond CUT Portsmouth Ltd | Other services | 2025 |
| Diamond Letting Services Limited | Real estate | 2014 |
| Diamond PVT Ltd | Wholesale & retail | 2024 |
| Dice Takeaway Ltd | Hospitality | 2022 |
| Dickson Developments Limited | Construction | 2008 |
| Dickson Sales Ltd | Administrative & support | 2014 |
| Diego Altamirano Limited | Health & social care | 2012 |
| Digital Display Systems UK Limited | Wholesale & retail | 2005 |
| Digital Enterprise Services Ltd | Information & communication | 2017 |
| Digital Fellow Ltd | Wholesale & retail | 2024 |
| Digital Krate Ltd | Information & communication | 2019 |
| Digital Made Limited | Information & communication | 2014 |
| Digital Magic Solutions Ltd | Information & communication | 2020 |
| Digital Royalty Ltd | Professional & scientific | 2021 |
| Digital Scientists Ltd | Information & communication | 2018 |
| Digital Wave Solutions Limited | Information & communication | 2014 |
| Digitastic Ltd | Public administration | 2020 |
| Digiteck Solutions Ltd | Information & communication | 2014 |
| Digweed Property Limited | Real estate | 2022 |
| Dil's Barbers 103 Limited | Other services | 2021 |
| Dil's Barbers 109 Limited | Other services | 2025 |
| Dilan Deziz Limited | Hospitality | 2026 |
| Dilan Food Centre Ltd | Wholesale & retail | 2016 |
| Diliciously Yours Ltd | Hospitality | 2017 |
| DILSBARBERS129 Ltd | Other services | 2025 |
| Dil’S Barber Ltd | Other services | 2026 |
| DIM SUM HUT Ltd | Manufacturing | 2021 |
| Dipak Dave Ltd. | Professional & scientific | 2016 |
| Dipu Limited | Wholesale & retail | 2022 |
| Direct Carpet Centre Limited | Other services | 2015 |
| Direct Contract Cleaning Limited | Other services | 2005 |
| Direct Trade Supplies Ltd. | Wholesale & retail | 2016 |
| Directions Event Signs Limited | Other services | 2011 |
| Dirty Dog Audio Limited | Information & communication | 2002 |
| Discover Recover Limited | Administrative & support | 2012 |
| Discrete Care Services Ltd | Health & social care | 2022 |
| Distinct UK Healthcare Ltd | Administrative & support | 2017 |
| Distinction Care Agency Limited | Health & social care | 2013 |
| Distribution Management Solutions Limited | Transport & logistics | 2007 |
| Ditirelo Limited | Health & social care | 2012 |
| Diverse Contracting Ltd | Construction | 2014 |
| Diverse Investments Limited | Construction | 1998 |
| Diverse Marine Holdings Limited | Manufacturing | 2018 |
| Diverse Marine Limited | Manufacturing | 2018 |
| Diverse Marine Sales & Lease Ltd | Wholesale & retail | 2023 |
| Diverse Marine Sales & LEASE(NO2) Limited | Wholesale & retail | 2025 |
| Divine Field Ltd | Construction | 2021 |
| Dixies Bar Ltd | Hospitality | 2017 |
| Diyan Holdings Ltd | Real estate | 2023 |
| DJ & RA Evans Limited | Health & social care | 2011 |
| DJT Composites Ltd | Manufacturing | 2023 |
| DKS Properties Limited | Real estate | 2020 |
| Dkuti Consultancy Ltd | Professional & scientific | 2026 |
| DKZ Engineers Ltd | Professional & scientific | 2025 |
| DL Services London Limited | Administrative & support | 2012 |
| DLG Decorating & Property Services Ltd | Construction | 2018 |
| DLG DPS Ltd | Construction | 2021 |
| DLH Interiors Limited | Construction | 2016 |
| DLM Cleaning Services Limited | Administrative & support | 2007 |
| DLP Roofing Ltd | Construction | 2023 |
| DLV Construction Limited | Construction | 2018 |
| DM Roofing Specialists Ltd | Construction | 2020 |
| Dm&Lcardiocare Limited | Health & social care | 2025 |
| DMB Scaffolding Limited | Construction | 2020 |
| Dmbr Maintenance Ltd | Construction | 2020 |
| DMC Cleaning Ltd | Administrative & support | 2026 |
| DMH Builders Ltd | Construction | 2018 |
| Dmrpl Foods Ltd | Wholesale & retail | 2020 |
| DN Associates (Gunville) Limited | Professional & scientific | 2016 |
| DN Contractors (I.W) Ltd | Construction | 2020 |
| DN Group (I.W) Limited | Financial services | 2015 |
| DN Properties (I.W) Limited | Financial services | 2015 |
| DNA Healthcare Agency Ltd | Other services | 2014 |
| DND French Polishers Limited | Administrative & support | 1999 |
| Docars Ltd | Administrative & support | 2023 |
| Dockside Fryers Limited | Hospitality | 2026 |
| Docmako Ltd | Wholesale & retail | 2024 |
| Doctor Jelly Limited | Information & communication | 2024 |
| Documanage Ltd | Information & communication | 2024 |
| Dodgem Hire Ltd | Administrative & support | 2023 |
| Dolina Detaling Ltd | Wholesale & retail | 2016 |
| Dollies Homes Limited | Real estate | 2024 |
| Dolly's Beauticians Limited | Other services | 2019 |
| Dolphin Property Rental Ltd | Real estate | 2021 |
| Domestic Appliance Cover Ltd | Other services | 2019 |
| Dominion Management Limited | Real estate | 2016 |
| Domino-Trans Ltd | Transport & logistics | 2022 |
| Dominus Fortitudo Limited | Wholesale & retail | 2024 |
| Domus Platinum Limited | Real estate | 2021 |
| Domux Luxury Living Ltd | Real estate | 2026 |
| DON Howard Properties Limited | Real estate | 2015 |