| DJM Contracts (NW) Ltd. | Construction | 1992 |
| DJM Entertainment Services Limited | Arts & recreation | 2015 |
| DJM Greenhouse Services Limited | Administrative & support | 2015 |
| DJM Installs Ltd | Construction | 2025 |
| DJM Rigging Limited | Information & communication | 2025 |
| DJM Telecom Ltd | Information & communication | 2022 |
| Djmfsd Ltd | Administrative & support | 2026 |
| DJO Auto Electrical Limited | Manufacturing | 2025 |
| Djpg Consulting Ltd | Professional & scientific | 2026 |
| Djsn Accounting Services Limited | Professional & scientific | 2003 |
| Djspubs Ltd | Hospitality | 2025 |
| DJW Contracts Ltd | Construction | 2025 |
| DK Civils Ltd | Construction | 2012 |
| Dk&T Ltd | Manufacturing | 2026 |
| DKH Limited | Wholesale & retail | 1973 |
| DKP Logistics Ltd | Transport & logistics | 2024 |
| Dkpl Enterprises Limited | Construction | 2026 |
| DKR Legal Services Ltd | Professional & scientific | 2024 |
| DKS Building Consultancy Ltd | Construction | 2025 |
| DKS Lettings Ltd | Real estate | 2025 |
| Dkw-Logistics Limited | Transport & logistics | 2024 |
| DL Clark Inns Ltd | Hospitality | 2022 |
| DLA Westside Ltd | Other services | 2022 |
| Dlanji Co Ltd | Wholesale & retail | 2025 |
| DLF Civil Engineering Ltd | Construction | 2017 |
| DLG Dance School Limited | Education | 2023 |
| Dlmj Music Ltd | Information & communication | 2021 |
| DLN Property Limited | Hospitality | 2020 |
| Dlovan Group Ltd | Wholesale & retail | 2025 |
| DLW Limited | Administrative & support | 2004 |
| DM Faraoni Services Limited | Professional & scientific | 2011 |
| DM Legal Consultants Ltd | Professional & scientific | 2023 |
| DM Properties North West Limited | Professional & scientific | 2019 |
| DMB 2000 Ltd | Manufacturing | 2023 |
| DMB Technical Solutions Limited | Other services | 2017 |
| DMC Housing Limited | Real estate | 2019 |
| DMD Design (Longridge) Limited | Wholesale & retail | 2020 |
| DMD Engineering & Farm Services Ltd | Manufacturing | 2019 |
| DMH Plastering Ltd | Construction | 2016 |
| DMM Controls Ltd | Manufacturing | 2017 |
| DMS Financial Services Ltd | Other services | 2017 |
| Dmtify Ltd | Wholesale & retail | 2023 |
| DNA Technical Ltd | Construction | 2021 |
| Dna-Agile Group Ltd | Information & communication | 2011 |
| DNM Demolition Limited | Construction | 2017 |
| DNPM3D Engineering Solutions Limited | Construction | 2026 |
| Dnsc Limited | Real estate | 2016 |
| DO & DA Ltd | Real estate | 2019 |
| DO Takeaway Ltd | Hospitality | 2025 |
| Do-It-Yourself Centre Limited | Wholesale & retail | 2005 |
| Docklands Motor Company Ltd | Wholesale & retail | 2014 |
| Docks Barbers Ltd | Other services | 2026 |
| Dockside Investments Ltd | Real estate | 2017 |
| Doctor Carpet Limited | Administrative & support | 2002 |
| Dodd Tree Contractors Ltd | Agriculture & fishing | 2023 |
| Doddrell’S Deliveries Ltd | Transport & logistics | 2018 |
| Dodgson's of Preston Limited | Wholesale & retail | 1949 |
| Doffour Nsoroma UK Limited | Wholesale & retail | 2024 |
| Dogs ARE Made for Walking Limited | Arts & recreation | 2020 |
| Dogs on Go Ltd | Other services | 2023 |
| Dogs@Delbank Limited | Hospitality | 2021 |
| Dogstuff Ltd | Wholesale & retail | 2020 |
| Dojo Installations Limited | Administrative & support | 2010 |
| DOK Investments Ltd | Real estate | 2026 |
| Dolarza Ltd | Wholesale & retail | 2019 |
| Dollys Wine Bar Ltd | Hospitality | 2025 |
| Dolphin 3D Ltd | Information & communication | 2023 |
| Dolphin Accounting & Services Ltd | Professional & scientific | 2014 |
| Dolphin Financial Advice Limited | Financial services | 2007 |
| Dolphin G B S Limited | Construction | 2006 |
| Dolphin Mining Crypto Ltd | Information & communication | 2021 |
| Dolphin Plastering Ltd | Construction | 2013 |
| Dolphin Properties 4 U Ltd | Real estate | 2025 |
| Dolu Nutrihealth Ltd | Health & social care | 2023 |
| Domain of Limitless Talent Ventures Ltd | Information & communication | 2024 |
| Domestic Cleaners 4 YOU Limited | Administrative & support | 2023 |
| Domestic Skip Hire Preston Limited | Water & waste | 2020 |
| Dominant Club Limited | Wholesale & retail | 2024 |
| Dominic Sutton Tennis Ltd | Education | 2021 |
| Dominic Thompson & Co Ltd | Professional & scientific | 2022 |
| Dominion Finance Limited | Financial services | 1992 |
| Domino Networks Limited | Wholesale & retail | 2012 |
| Domino Software Limited | Information & communication | 1986 |
| Domus Acquisitions Ltd | Real estate | 2025 |
| DON Bruno Limited | Information & communication | 2023 |
| DON Mario Ltd | Hospitality | 2026 |
| Donably UK Ltd | Administrative & support | 2020 |
| Donlogan Limited | Real estate | 2021 |
| Donna Maria Preston Ltd | Hospitality | 2026 |
| Donna Marie Aesthetics Ltd | Other services | 2021 |
| Doodle Express Limited | Wholesale & retail | 2023 |
| Doodle Pups Ltd | Wholesale & retail | 2019 |
| Doogle Solution Ltd | Information & communication | 2019 |
| Dooleeg (Construction and Plant Hire) Ltd | Construction | 2010 |
| Dooshec Ltd | Professional & scientific | 2024 |
| Dooyork Limited | Construction | 2002 |
| Dorchester Flats Management Company Limited | Households | 1990 |
| Dores Consulting Limited | Wholesale & retail | 2023 |
| Dorman Smith Holdings Limited | Professional & scientific | 1910 |
| Dorman Smith Switchgear Limited | Manufacturing | 1937 |