| Dickson Road Self Storage Ltd | Other services | 2008 |
| Dickson Road Valeting Ltd | Administrative & support | 2023 |
| Digital Basket Ltd | Information & communication | 2015 |
| Digital Guest Guide Ltd | Information & communication | 2022 |
| Digital INK Direct Ltd | Wholesale & retail | 2021 |
| Digital Marketing Frontier Ltd | Professional & scientific | 2024 |
| Digital Mindset Online Limited | Information & communication | 2020 |
| Digital Optimisation and Transformation Ltd | Information & communication | 2024 |
| Digital Relay Software Ltd | Wholesale & retail | 2025 |
| Digital Screen Media Limited | Professional & scientific | 2021 |
| Digital Signage Systems Ltd | Information & communication | 2019 |
| Digital Solutions (NE) Limited | Administrative & support | 2008 |
| Digital Telecom (U.K.) Limited | Information & communication | 1987 |
| Digitech Cctv Limited | Administrative & support | 2005 |
| Dilege Yachting Ltd | Extraterritorial | 2024 |
| Diligent QA Limited | Information & communication | 2018 |
| Dimensions Interiors Ltd | Other services | 2025 |
| Dinners Ready Ltd | Hospitality | 2026 |
| Dioko Consulting Limited | Information & communication | 2012 |
| DIP Pres Group Ltd | Construction | 2020 |
| Direct Construction Recruitment Ltd | Administrative & support | 2018 |
| Direct Legal Services Ltd | Information & communication | 2017 |
| Direct Paper Agents Limited | Wholesale & retail | 1934 |
| Direct Salon Supplies Limited | Wholesale & retail | 2005 |
| Direct Tyre Management Limited | Transport & logistics | 2004 |
| Direct Tyre Sales Limited | Financial services | 2009 |
| Dirty Dogs Cadishead Ltd | Other services | 2022 |
| Discount Domestic Heating (Blackpool) Limited | Administrative & support | 2015 |
| Discount Football Shirt Framing Limited | Administrative & support | 2017 |
| Discount Tyres 1 Limited | Wholesale & retail | 2015 |
| Distinctive Nail Products Limited | Wholesale & retail | 2000 |
| Ditman & Sillis Ltd | Real estate | 2021 |
| Divaaco Ltd | Information & communication | 2015 |
| Diversifi Funding Solutions Ltd | Financial services | 2025 |
| Divine Empowerment Ltd | Education | 2021 |
| Divishani Ltd | Wholesale & retail | 2018 |
| Divitiae Creatio Investments Ltd | Financial services | 2025 |
| Diyuk Ltd | Wholesale & retail | 2022 |
| Dizayn DIS Ticaret Ltd | Extraterritorial | 2023 |
| DJ Asset Group Ltd | Real estate | 2025 |
| DJ Mottershead Consultancy Ltd | Information & communication | 2018 |
| Djac Services Ltd | Information & communication | 2018 |
| Djb(Nw) Ltd | Wholesale & retail | 2024 |
| DJC Safety Ltd | Construction | 2025 |
| Djcg Ltd | Financial services | 2020 |
| DJE Care Ltd | Health & social care | 2020 |
| DJH Blackpool Ltd | Arts & recreation | 2014 |
| Djks Developments Ltd | Hospitality | 2003 |
| DJM Grab Hire Ltd | Water & waste | 2024 |
| DJM QS Consulting Limited | Professional & scientific | 2016 |
| DJP Communications Ltd | Information & communication | 2020 |
| DJP Movements Limited | Transport & logistics | 2025 |
| DJT Design Limited | Professional & scientific | 2016 |
| DJT Finance and Consultancy Limited | Professional & scientific | 2014 |
| Dkab Ltd | Wholesale & retail | 2023 |
| DKK Rigging Services Limited | Mining & quarrying | 2014 |
| DLC Caravan Servicing Ltd | Manufacturing | 2025 |
| DLD Mags PVT Ltd | Health & social care | 2017 |
| DLG Leisure Limited | Arts & recreation | 2014 |
| DM Contractors Limited | Administrative & support | 2018 |
| DMA Motor Company (North West) Limited | Wholesale & retail | 2025 |
| Dmacdonald Mortgages Ltd | Financial services | 2023 |
| Dmcg Services Ltd | Hospitality | 2025 |
| DMH Delivers Ltd | Transport & logistics | 2025 |
| DMK Gifts Limited | Arts & recreation | 2022 |
| Dmkks Finance Limited | Professional & scientific | 2018 |
| DMR Association Limited | Administrative & support | 2011 |
| DMR Rope Access Ltd | Construction | 2019 |
| DMW Inspection Services Ltd | Professional & scientific | 2017 |
| DNA Investments and Property Limited | Real estate | 2024 |
| DND Gyms Limited | Education | 2025 |
| DNI Groundworks Limited | Construction | 2026 |
| Dobbie Properties Ltd | Construction | 2017 |
| DOC ENG Ltd | Professional & scientific | 2019 |
| Docherty Enterprise Limited | Financial services | 2016 |
| Docks.Radio Ltd | Information & communication | 2026 |
| Doctab Limited | Wholesale & retail | 2024 |
| Dodo Yachting Limited | Extraterritorial | 2019 |
| Doherty's Destiny Limited | Information & communication | 2017 |
| Dolabank Limited | Health & social care | 2008 |
| Dolce Blush Limited | Hospitality | 2026 |
| Dollhse Limited | Other services | 2020 |
| Dollond & Aitchison Pension Trustees Limited | Extraterritorial | 1995 |
| Dolman Limited | Real estate | 1936 |
| Dolphin Renos Ltd | Construction | 2020 |
| Domagalski Ltd | Manufacturing | 2022 |
| Domain Giants Limited | Administrative & support | 2017 |
| Domenico D'Avanzo Limited | Extraterritorial | 2023 |
| Dominion Retail Limited | Wholesale & retail | 2014 |
| Dominus Technologies Limited | Information & communication | 2024 |
| DON Jeffs & Sons Limited | Construction | 2015 |
| Donia Prime Ltd | Hospitality | 2019 |
| Donut Star Ltd | Hospitality | 2022 |
| Doodle Engineering Limited | Mining & quarrying | 2009 |
| Door Handle Superstore Ltd | Extraterritorial | 2021 |
| Doorpoint Limited | Professional & scientific | 2005 |
| Dosanjh and Sandhu Ltd | Real estate | 2025 |
| Dosd Ltd | Information & communication | 2018 |
| DOT Red Limited | Information & communication | 2011 |
| Dotless Limited | Professional & scientific | 2015 |