| Denis Kubilay Limited | Wholesale & retail | 2026 |
| Denler Properties Limited | Real estate | 2017 |
| Dennyvale Limited | Real estate | 2003 |
| Dentasmile Limited | Health & social care | 2007 |
| Dentique Ltd | Health & social care | 2026 |
| Dentist Roman Londra Limited | Health & social care | 2025 |
| Dentist Roman UK Limited | Financial services | 2025 |
| Derban Limited | Professional & scientific | 2009 |
| Derbo Ltd | Wholesale & retail | 2026 |
| Derby Cigar Stores Ltd | Wholesale & retail | 2026 |
| DERISK360 Ltd | Information & communication | 2018 |
| Derma Aesthetic London Ltd | Health & social care | 2024 |
| Derma Aesthetics London Ltd | Health & social care | 2020 |
| Dermahub Clinic Ltd | Health & social care | 2023 |
| Desalda Limited | Professional & scientific | 2022 |
| Design & Build Property Rentals Ltd | Real estate | 2023 |
| Design & Moore Limited | Professional & scientific | 2020 |
| Design & Tailoring Ltd | Other services | 2015 |
| Design Fusion Art Club Ltd | Education | 2026 |
| Design Heaven Limited | Construction | 2022 |
| Design London Fair Limited | Administrative & support | 2014 |
| Design Teez Ltd | Wholesale & retail | 2024 |
| Designeralp Limited | Professional & scientific | 2022 |
| Dessert Republic Limited | Hospitality | 2013 |
| Destomo Limited | Professional & scientific | 2022 |
| Destriar International Limited | Wholesale & retail | 2026 |
| DEV & Co Limited | Wholesale & retail | 2015 |
| DEV Construction Consultancy Ltd | Construction | 2026 |
| DEV Construction Consultancy Services Ltd | Construction | 2026 |
| DEV Corporation Limited | Wholesale & retail | 2012 |
| Deva & Sisters Properties Ltd | Real estate | 2026 |
| Devam END of Tenancy Cleaning Ltd | Administrative & support | 2025 |
| Devam Estates Limited | Real estate | 2018 |
| Devam Ltd | Construction | 2017 |
| Devasumi Engineering Limited | Administrative & support | 2011 |
| Devata Limited | Real estate | 2021 |
| Devcubix Ltd | Wholesale & retail | 2025 |
| Development Launch Ltd | Information & communication | 2025 |
| Develoscape London Limited | Construction | 2020 |
| Devidu Limited | Real estate | 2017 |
| Devix Limited | Construction | 2025 |
| Devsatya Corporation Limited | Wholesale & retail | 2025 |
| Dewbarn Limited | Administrative & support | 2003 |
| DEX Services Limited | Administrative & support | 2002 |
| DEY Security Limited | Administrative & support | 2026 |
| DF Holdings Ltd | Real estate | 2024 |
| DFC Professional Tiling Ltd | Construction | 2022 |
| DFD London Limited | Wholesale & retail | 2019 |
| DFK Global Ltd | Wholesale & retail | 2026 |
| Dfle UK Limited | Administrative & support | 2015 |
| DFN Trans Ltd | Transport & logistics | 2018 |
| DGC International Limited | Information & communication | 2020 |
| DGC Logistics Ltd | Administrative & support | 2016 |
| DGS Property Management Ltd | Real estate | 2025 |
| Dgtc Ltd | Wholesale & retail | 2015 |
| DH Film Services Limited | Professional & scientific | 2021 |
| Dhabayaco Shop Limited | Extraterritorial | 2023 |
| Dhamays Collections Ltd | Wholesale & retail | 2025 |
| Dhava Limited | Hospitality | 2018 |
| Dhot Associates Limited | Health & social care | 2014 |
| Diaan Investments Ltd | Financial services | 2022 |
| Diabetes Training and Management Services Ltd | Health & social care | 2009 |
| Diadem R Limited | Construction | 2019 |
| Diamante Limited | Real estate | 1986 |
| Diamond Gifts Ltd | Wholesale & retail | 2024 |
| Diamond Impex Ltd | Manufacturing | 2016 |
| Diamond Value Partners Limited | Financial services | 2017 |
| Diamondstar Construction Ltd | Construction | 2015 |
| Diamorea Ltd | Manufacturing | 2024 |
| Diamoreuk Ltd | Other services | 2021 |
| Diana Business Solutions Ltd | Professional & scientific | 2023 |
| Diana Secure Services Ltd | Transport & logistics | 2016 |
| Diba Foods Ltd | Wholesale & retail | 2026 |
| Dibra Carpentry Ltd | Construction | 2020 |
| Dibson Limited | Professional & scientific | 2013 |
| Dicanda Limited | Professional & scientific | 2023 |
| Diceload Limited | Professional & scientific | 1993 |
| Dickson MBI Company Limited | Arts & recreation | 2018 |
| Didaska Management and Investment Limited | Financial services | 2024 |
| Diep Logistics Ltd | Transport & logistics | 2025 |
| DIG N OUT Ltd | Administrative & support | 2022 |
| Digela Ltd | Construction | 2017 |
| Digipath Solutions Limited | Professional & scientific | 2024 |
| Digiquette Ltd | Information & communication | 2022 |
| Digirecast Global Ltd | Information & communication | 2017 |
| Digital Hive London Limited | Other services | 2015 |
| Digital Inspired Ltd | Information & communication | 2019 |
| Digital Network Assembly Limited | Information & communication | 2017 |
| Digital Security Academy Ltd | Information & communication | 2015 |
| Digitalbot Technologies Limited | Information & communication | 2026 |
| Digitally Square Limited | Information & communication | 2025 |
| DIL Holdings Limited | Financial services | 2006 |
| DIL Properties Limited | Real estate | 1970 |
| Dilamu Holdings Limited | Wholesale & retail | 2019 |
| Dillon Care Limited | Health & social care | 2009 |
| Dillon Estates Ltd | Administrative & support | 2010 |
| Dilniy Limited | Real estate | 2015 |
| Dilshad's Kitchen Ltd | Hospitality | 2026 |
| Dimension Properties UK Limited | Real estate | 2005 |
| Dingle Herring & Company Limited | Information & communication | 2017 |