| Digital Assets International Limited | Information & communication | 2021 |
| Digital Coaching Academy Limited | Administrative & support | 2020 |
| Digital INNOV8ORS Ltd. | Information & communication | 2016 |
| Digital Layer Limited | Information & communication | 2021 |
| Digital Liquid Design Limited | Information & communication | 2004 |
| Digital Media Gang Ltd | Professional & scientific | 2019 |
| Digital Office Technology Limited | Administrative & support | 2009 |
| Digital Quota Ltd | Information & communication | 2018 |
| Digital Signalling Solutions Limited | Real estate | 2020 |
| Digital Technpedia Ltd | Information & communication | 2020 |
| Digitalblade Limited | Wholesale & retail | 2021 |
| Digitaldream Estates Ltd | Professional & scientific | 2024 |
| Dimedwellings Ltd | Real estate | 2020 |
| Dimension Landscape & Driveways Limited | Construction | 2009 |
| Dimension Paving & Sons Ltd | Construction | 2020 |
| Dingbat Beer Ltd | Manufacturing | 2018 |
| Dingle Court RTM Company Limited | Households | 2026 |
| Direct GAS Services Ltd | Manufacturing | 2026 |
| Direct Hand Tools Ltd | Wholesale & retail | 1998 |
| Direct Power Group Limited | Construction | 2022 |
| Direct Tree Surgery Limited | Administrative & support | 2020 |
| Directcarsuk Limited | Wholesale & retail | 2014 |
| Dirft Central Management Limited | Real estate | 1995 |
| Dirft East Management Limited | Real estate | 1995 |
| Dirft III Management Company Limited | Real estate | 2015 |
| Dirft South Management Limited | Real estate | 1995 |
| Dirty Liquor Limited | Administrative & support | 2016 |
| Discovery Geoscience Ltd | Mining & quarrying | 2020 |
| Discovery Utilities Ltd | Professional & scientific | 2023 |
| Discoveryconnection Ltd. | Administrative & support | 2018 |
| Discus Systems PLC | Information & communication | 1997 |
| Dispatch Ltd | Professional & scientific | 2020 |
| Dissect Limited | Professional & scientific | 2014 |
| District Properties Limited | Households | 2018 |
| Diverse Housing Group Ltd | Real estate | 2023 |
| Diverse Housing Network Ltd | Real estate | 2023 |
| Divine Accessories Limited | Professional & scientific | 2021 |
| Divine Fine Wines Ltd | Professional & scientific | 2003 |
| Divine Plus Limited | Other services | 2013 |
| Divine Strength Clothing Ltd | Wholesale & retail | 2025 |
| Divinity Health Ltd | Health & social care | 2026 |
| Divinity Propco Ltd | Real estate | 2017 |
| Divya Shah Ltd | Professional & scientific | 2024 |
| Dixon Dunn Care Solihull Limited | Health & social care | 2015 |
| Diya & T Limited | Hospitality | 2015 |
| Dizitalpods Ltd | Information & communication | 2022 |
| Dizzy Moon Cocktails Ltd | Hospitality | 2023 |
| DJ Fleming Construction Services Limited | Construction | 2005 |
| DJ Kevin Round Ltd | Arts & recreation | 2025 |
| DJC Landscaping and Brickwork Ltd | Professional & scientific | 2019 |
| DJD Property Services Limited | Real estate | 2024 |
| Djga Properties Ltd | Real estate | 2018 |
| DJI Limited | Wholesale & retail | 2016 |
| DJL Building Limited | Construction | 2010 |
| DJM Supply Co Ltd | Wholesale & retail | 2025 |
| DJR Plumbing and Heating Ltd | Construction | 2013 |
| DJT Maarss Ltd | Information & communication | 2012 |
| DJV Capital Ltd | Financial services | 2025 |
| DK Andrews Ltd | Real estate | 2019 |
| DKG Consulting Ltd | Professional & scientific | 2013 |
| Dkjc Limited | Professional & scientific | 2016 |
| DKM Building Group Ltd | Construction | 2026 |
| DKM Engineering Ltd | Professional & scientific | 2025 |
| DKW Transport Ltd | Transport & logistics | 2018 |
| DL Gibson Ltd | Professional & scientific | 2016 |
| DL Solutions Limited | Professional & scientific | 1999 |
| DLB & JB Holdings Co Ltd | Professional & scientific | 2015 |
| DLC Management Consulting Limited | Professional & scientific | 2011 |
| DLM Cards Ltd | Wholesale & retail | 2025 |
| DLM Tutoring Ltd | Education | 2024 |
| DM Hurst Financial Services Ltd | Professional & scientific | 2020 |
| DM3 Rail Limited | Professional & scientific | 2015 |
| Dmac Art Limited | Administrative & support | 2003 |
| DMC24CRT Ltd | Manufacturing | 2023 |
| Dmhawk Ltd | Transport & logistics | 2025 |
| Dmjphillips Limited | Professional & scientific | 2026 |
| DMK Waste Management & Recycling Limited | Transport & logistics | 2020 |
| DML Limited | Construction | 2018 |
| DMS Tooling Ltd | Wholesale & retail | 2024 |
| DMZ Investments Limited | Real estate | 2011 |
| DN Recordings Limited | Information & communication | 2003 |
| DN Regen Ltd | Real estate | 2011 |
| DNA Group International Ltd | Construction | 2022 |
| Dncnc Service Limited | Manufacturing | 2011 |
| DNF Medix Limited | Health & social care | 2010 |
| DNM Joinery Ltd | Manufacturing | 2022 |
| DNS Halsey Associates Limited | Professional & scientific | 2005 |
| DO Design Consultants Ltd | Professional & scientific | 2022 |
| Dober Ltd | Real estate | 2024 |
| Docspert Health Limited | Health & social care | 2020 |
| Docspert Limited | Health & social care | 2020 |
| Docspot Ltd | Information & communication | 2026 |
| Docwise Ltd | Information & communication | 2025 |
| Doddz Ltd | Professional & scientific | 2021 |
| Dogs & Kisses Ltd | Other services | 2016 |
| Dogsofdorridge Ltd | Other services | 2025 |
| Doherty Builders and Property Rentals Ltd | Real estate | 2024 |
| DOJ Wealth Management Limited | Administrative & support | 2002 |
| Dolce Aesthetic Clinic & Academy Ltd | Manufacturing | 2023 |
| Dolce Vita Events Ltd | Extraterritorial | 2010 |