| Divine Empire Limited | Administrative & support | 2023 |
| Divine Link Health Care Services Limited | Health & social care | 2026 |
| Divine Path Beauty Ltd | Other services | 2024 |
| Dixon Groundworks Ltd | Construction | 2020 |
| Dixon Piling Holdings Ltd | Professional & scientific | 2020 |
| Dixon Piling Limited | Construction | 2001 |
| Dixon Reinforcements Ltd | Construction | 2020 |
| Dixon Simmons & Turner Financial Solutions Limited | Financial services | 2020 |
| DJ Pomphrett Limited | Professional & scientific | 2023 |
| DJ Samuel Hann Ltd | Arts & recreation | 2024 |
| DJB Properties and Investments Limited | Real estate | 2024 |
| DJB Roofing Limited | Construction | 2018 |
| DJC Brickwork Ltd | Construction | 2025 |
| DJK Property Ltd | Real estate | 2023 |
| DJL Finance Limited | Professional & scientific | 2023 |
| DJP Home Improvements Ltd | Construction | 2025 |
| Djrj Consulting Ltd | Professional & scientific | 2012 |
| DJW Agricultural Services Ltd | Manufacturing | 2026 |
| DJW Properties Ltd | Real estate | 2018 |
| DK Commercial Services (Essex) Ltd | Water & waste | 2012 |
| DK Distribution Ltd | Wholesale & retail | 2025 |
| DK International Logistics Limited | Transport & logistics | 2023 |
| Dk-Schweizer (UK) Limited | Wholesale & retail | 2003 |
| DKF Ltd | Construction | 2016 |
| DKS Sport and Transport Ltd | Arts & recreation | 2004 |
| DKS Sport Limited | Arts & recreation | 2011 |
| DL Hogg Limited | Construction | 2026 |
| DL Property Holdings Ltd | Construction | 2019 |
| DLC Construction Consultant Ltd. | Construction | 2002 |
| DLC Industries Ltd | Professional & scientific | 2025 |
| DLC Limited | Manufacturing | 2000 |
| DLR Building Solutions Limited | Construction | 2016 |
| DLR Interiors Ltd | Construction | 2011 |
| DLR Kitchen Installations Ltd | Construction | 2014 |
| DLR Properties Ltd | Real estate | 2019 |
| DM Automotive & Engineering Ltd | Wholesale & retail | 2018 |
| DM Scaffolding Essex Limited | Construction | 2025 |
| DM Sports Coaching LLP | | 2024 |
| Dmac Architects Ltd | Professional & scientific | 2022 |
| DMC Marine Limited | Professional & scientific | 2020 |
| DMC Productions Limited | Other services | 2014 |
| Dmcm Haste Limited | Real estate | 2020 |
| DMH Prop Co Limited | Real estate | 2024 |
| DMJ Management Ltd | Real estate | 2019 |
| DMS Healthcare Service Limited | Administrative & support | 2023 |
| DMS Plumbing Services Ltd | Construction | 2022 |
| Dmsl Logistics Ltd | Transport & logistics | 2024 |
| DNA Auto Essex Limited | Wholesale & retail | 2025 |
| DNA Auto Garages Ltd | Wholesale & retail | 2025 |
| DNA Music Limited | Arts & recreation | 2003 |
| DNA Portfolio Ltd | Real estate | 2023 |
| DND Carpentry Limited | Construction | 2017 |
| DND Logistics Limited | Transport & logistics | 2022 |
| DND Trailer Services Limited | Other services | 2025 |
| DNE Construction Ltd | Construction | 2021 |
| Dnsic Limited | Hospitality | 2024 |
| DNZ & ADA Ltd | Hospitality | 2019 |
| Dobi Homes Limited | Real estate | 2026 |
| Dock & Cottee Carpentry Limited | Construction | 2019 |
| Docklands Parking (London) Limited | Other services | 2022 |
| Doel Transfer Limited | Professional & scientific | 2024 |
| Dog MUM Mindset Ltd | Other services | 2023 |
| Doganli Ltd | Hospitality | 2026 |
| Dogstar Ltd | Administrative & support | 2019 |
| Dogwarts Investments Limited | Financial services | 2024 |
| Doinika Ltd | Manufacturing | 2025 |
| Dole Chimney Services Limited | Administrative & support | 2017 |
| Dolomite Limited | Real estate | 2022 |
| Dolphin Court Frinton Limited | Households | 1981 |
| Doma Caffe Ltd | Hospitality | 2025 |
| Domax Holdings Limited | Financial services | 2019 |
| Domax Investments Limited | Professional & scientific | 2004 |
| Domestic Appliance Centre (Ipswich) Limited | Wholesale & retail | 2005 |
| Dominance Trading Company Limited | Wholesale & retail | 2025 |
| DON & Co. Property Limited | Extraterritorial | 2019 |
| DON Randall Associates Limited | Professional & scientific | 2014 |
| DON Salvador Ltd | Arts & recreation | 2025 |
| Don'T Take a Fence Limited | Construction | 2023 |
| Don'T TRY Ltd | Wholesale & retail | 2019 |
| Done Dave Limited | Administrative & support | 2014 |
| Donkey & Buskins LLP | | 2018 |
| Donmezz Ltd | Households | 2025 |
| Donna Collins Limited | Information & communication | 2025 |
| Donnelly Antiques Limited | Wholesale & retail | 2000 |
| Donovan Graphics Ltd | Professional & scientific | 2002 |
| Doobay Lettings Ltd | Real estate | 2004 |
| Doonfield Limited | Construction | 1978 |
| Dorebar Investments Ltd | Financial services | 2017 |
| Doreward Hall Granite and Marble (Specialists) Ltd | Manufacturing | 2010 |
| Dorey Maritime Ltd | Professional & scientific | 2023 |
| Dorje Essex Limited | Hospitality | 2024 |
| Dormy Houses Ltd | Extraterritorial | 2020 |
| Doro Speed Ltd | Transport & logistics | 2020 |
| Dorset Square (Lawford) Company Limited | Households | 2021 |
| DOT Dash Creative Ltd | Arts & recreation | 2025 |
| Dotcraft Limited | Information & communication | 2017 |
| Dottie Dollie Ltd | Arts & recreation | 2010 |
| Dotux Limited | Professional & scientific | 2024 |
| Double Glazing Essex Ltd | Construction | 2010 |
| Double H Steelworks Ltd | Professional & scientific | 2016 |