| Direct Shipping Agencies Limited | Transport & logistics | 1992 |
| DIRECT2MARKET Group Limited | Wholesale & retail | 2017 |
| DIRECT2MARKET Limited | Wholesale & retail | 2020 |
| Directors CUT Films Limited | Information & communication | 1999 |
| Disaya UK Limited | Wholesale & retail | 2022 |
| Discovery Land & Planning Limited | Professional & scientific | 2023 |
| Discovery MPV Ltd | Wholesale & retail | 2006 |
| Dish of the Day Limited | Hospitality | 2014 |
| Dissenters Ltd | Administrative & support | 2024 |
| Distinction Accountancy Ltd | Professional & scientific | 2023 |
| DJB Electrical & Testing Ltd | Construction | 2026 |
| DJB Estates Limited | Real estate | 2025 |
| DJB Safeguarding Ltd | Professional & scientific | 2014 |
| DJF Event Services Limited | Construction | 2017 |
| DJK Media Ltd | Professional & scientific | 2025 |
| Djrm Consultants Ltd | Construction | 2026 |
| DK Remote IT Support Ltd | Wholesale & retail | 2022 |
| DK Services Group Ltd | Construction | 2003 |
| DK Thinks Ltd | Information & communication | 2025 |
| Dkmsa Limited | Wholesale & retail | 2022 |
| DL Commercial Management Services Ltd | Professional & scientific | 2025 |
| DL Regeneration Limited | Professional & scientific | 2022 |
| DL Restorations Limited | Professional & scientific | 2022 |
| DM Electrical (Essex) Ltd | Construction | 2011 |
| Dmab Productions Limited | Arts & recreation | 2018 |
| DMK Mechanical Engineering Limited | Construction | 2023 |
| DMR Scaffolding Ltd | Construction | 2023 |
| DNI Interiors Limited | Construction | 2019 |
| DNL Tools Ltd | Wholesale & retail | 2010 |
| DNP Autos Limited | Wholesale & retail | 2014 |
| Dobbyn Asset Management Limited | Financial services | 2026 |
| Dobson’S Choice Holdings Ltd | Financial services | 2025 |
| Dodkins Brickwork Limited | Construction | 2025 |
| Dogs on the Run Limited | Professional & scientific | 2019 |
| Dogsify Ltd | Wholesale & retail | 2013 |
| Dokin Delivery Ltd | Wholesale & retail | 2023 |
| DOL Solutions Ltd | Financial services | 2021 |
| Dole Nunn Developments Ltd | Real estate | 2019 |
| Dole Nunn HMO Investments Ltd | Real estate | 2023 |
| Dole Nunn Investments Ltd | Real estate | 2025 |
| DOM Contractors Limited | Other services | 2017 |
| Dome Storage Limited | Administrative & support | 2016 |
| Domuscom Ltd | Real estate | 2019 |
| DON Contractors Ltd | Construction | 2022 |
| Donna Coombs Ltd | Administrative & support | 2020 |
| Dorant Technology Limited | Information & communication | 2011 |
| Dores Developments Ltd | Construction | 2021 |
| Dorma Construction LLP | | 2008 |
| Dottie Properties Ltd | Real estate | 2020 |
| Double K Investments Ltd | Real estate | 2024 |
| Dove Squared Limited | Professional & scientific | 2019 |
| Dovetailed Designs Limited | Manufacturing | 2003 |
| DP29 Limited | Other services | 2011 |
| Dpco Holdings Limited | Wholesale & retail | 2019 |
| DPH Fire Protection Ltd | Public administration | 2022 |
| DPN Associates Ltd | Construction | 2018 |
| DPO for Education Limited | Professional & scientific | 2026 |
| DR Drip Clothing Ltd | Wholesale & retail | 2023 |
| DR Ellie Aesthetics Limited | Health & social care | 2020 |
| DR Express Couriers Limited | Transport & logistics | 2024 |
| Dragon on Sea Ltd | Other services | 2023 |
| Dragonbay Limited | Extraterritorial | 2014 |
| Dragonfli Technology Limited | Information & communication | 2026 |
| Drapers Court LLP | | 2014 |
| Dream Furnishings Limited | Wholesale & retail | 2015 |
| Dreambreak Limited | Administrative & support | 1986 |
| Drew & Company Ltd | Real estate | 2014 |
| Drew Property Essex Ltd | Real estate | 2021 |
| DRH LLP | | 2024 |
| Dristar Trading Limited | Hospitality | 2011 |
| DRIVE2VISION Limited | Education | 2020 |
| DRM Fire Protection Limited | Construction | 2022 |
| Droneflo Limited | Extraterritorial | 2015 |
| Drury Film & Drama Limited | Information & communication | 2026 |
| Druthers Limited | Administrative & support | 2016 |
| DS Global Solutions Limited | Administrative & support | 2009 |
| DS Mena Ltd | Financial services | 2020 |
| Dsdc (UK) Ltd | Administrative & support | 2015 |
| DSH Services Ltd | Professional & scientific | 2023 |
| Dsmi Property Investment Ltd | Real estate | 2023 |
| Dsmi Property Ltd | Real estate | 2023 |
| DTJ Group Solutions Limited | Financial services | 2023 |
| Dtrd Professional Services Limited | Administrative & support | 2026 |
| Dtrt Ltd | Professional & scientific | 2019 |
| DTS Fire Solutions Limited | Professional & scientific | 2020 |
| DTS IT Consulting Limited | Information & communication | 2022 |
| Dtsb Digital Limited | Wholesale & retail | 2010 |
| Dual Electrical Limited | Manufacturing | 2023 |
| Duck Smart Limited | Administrative & support | 2011 |
| Duel Fitness Limited | Arts & recreation | 2009 |
| Dulce Solutions & Kitchen Limited | Manufacturing | 2025 |
| Dull BOY Pictures Ltd. | Information & communication | 2003 |
| Dunford Maven Limited | Professional & scientific | 2020 |
| Dungannon Chase Residents (Maintenance) Limited | Hospitality | 1996 |
| DW Maintenance & Repairs Ltd | Other services | 2020 |
| DW Plantscape Limited | Construction | 2020 |
| DWB Elite Electrical Ltd | Construction | 2026 |
| DWD Discount Windows & Doors Limited | Other services | 2005 |
| Dwheeler Ltd | Construction | 2015 |
| DWR Media Limited | Professional & scientific | 2008 |