| Digicoom Limited | Information & communication | 2021 |
| Digiflex Services Ltd | Wholesale & retail | 2024 |
| Digimail Consultancy Ltd | Professional & scientific | 2021 |
| Diginet Pro Limited | Real estate | 2013 |
| Digipi Ltd | Information & communication | 2026 |
| Digital Beads Ltd | Information & communication | 2011 |
| Digital Business Advisory Limited | Information & communication | 2018 |
| Digital Change Ltd | Information & communication | 2015 |
| Digital Communication Group Limited | Information & communication | 2018 |
| Digital Content UK Limited | Professional & scientific | 2022 |
| Digital Display Warehouse Ltd | Wholesale & retail | 2025 |
| Digital for Humanity CIC | Wholesale & retail | 2021 |
| Digital Human Estates Limited | Real estate | 2020 |
| Digital Human Limited | Professional & scientific | 2017 |
| Digital Mustard Limited | Information & communication | 2026 |
| Digital Optimum Ltd | Professional & scientific | 2022 |
| Digital People London Limited | Administrative & support | 2006 |
| Digital PM Ltd | Administrative & support | 2013 |
| Digital Print Technologies Ltd | Administrative & support | 2012 |
| Digital Service Solution Ltd | Information & communication | 2015 |
| Digital Specialty Chemicals (UK) Limited | Wholesale & retail | 2002 |
| Digital Strategiser Ltd | Information & communication | 2024 |
| Digitalhustle Global Ltd | Wholesale & retail | 2025 |
| Digitally Balanced Ltd | Professional & scientific | 2026 |
| DIGITALSHOP42 Ltd | Wholesale & retail | 2025 |
| Digitalxpress Limited | Information & communication | 2008 |
| Digitek Ltd | Information & communication | 2014 |
| Digitizethis Limited | Information & communication | 2013 |
| Digs Kids Wear Ltd | Other services | 2020 |
| Dihya Gold Limited | Wholesale & retail | 2024 |
| Dihya Investments Limited | Financial services | 2024 |
| Dileva Fitness Limited | Arts & recreation | 2018 |
| Dilhano Limited | Wholesale & retail | 2024 |
| Dili-Dili Ltd | Wholesale & retail | 2020 |
| Dilkush Enterprises Ltd. | Wholesale & retail | 2024 |
| Dilli Limited | Wholesale & retail | 2013 |
| Dillon Brothers Civil Engineering Limited | Professional & scientific | 2012 |
| Dillon Brothers Investments Ltd | Real estate | 2019 |
| Dilr.Ai Ltd | Wholesale & retail | 2025 |
| Dilrhe Ltd | Real estate | 2015 |
| Dilseone Limited | Professional & scientific | 2016 |
| Dilton & Mice Ltd | Professional & scientific | 2013 |
| Dilton Discount Store Limited | Wholesale & retail | 2019 |
| Dilton Homes Limited | Real estate | 2024 |
| Dilton Stores Limited | Real estate | 2014 |
| Dilvini Limited | Wholesale & retail | 2019 |
| Dilx Limited | Wholesale & retail | 2025 |
| DIM Construct 24/7 Ltd | Construction | 2026 |
| Dima Drylining Team Ltd | Construction | 2016 |
| Dima Properties Limited | Real estate | 2015 |
| Dimacare Limited | Health & social care | 2024 |
| Dime Development C.I.C. | Education | 2024 |
| Dimee International Limited | Wholesale & retail | 2009 |
| Dimension Three Event Services Ltd | Arts & recreation | 2022 |
| Dina Consulting Limited | Professional & scientific | 2018 |
| Dina Services Ltd | Construction | 2022 |
| Dinamit Limited | Health & social care | 2012 |
| Dinar Tarcar Resources (UK) Limited | Extraterritorial | 2015 |
| Dinastra Ltd | Wholesale & retail | 2026 |
| Dinath Theesan Limited | Wholesale & retail | 2024 |
| Dineloop Limited | Information & communication | 2026 |
| Diner Free From Limited | Hospitality | 2024 |
| Dinerstein Property Limited | Real estate | 2022 |
| Dineshestates Limited | Real estate | 2024 |
| Dingfeng Construction Ltd | Construction | 2026 |
| Dingo JR. Trans Limited | Transport & logistics | 2019 |
| Dinix Laser Ltd | Other services | 2023 |
| Dinjer Group Ltd | Wholesale & retail | 2018 |
| Dinner Ladies Collective Ltd | Hospitality | 2023 |
| Dinner Ladies Limited | Hospitality | 2015 |
| Dino Design Ltd | Construction | 2022 |
| Dinosaur Adventure Live Limited | Arts & recreation | 2021 |
| Dinserve Limited | Information & communication | 2020 |
| Dinush Jewellers Ltd | Wholesale & retail | 2015 |
| DIO Consulting Ltd | Administrative & support | 2004 |
| DIP Tiling Ltd | Construction | 2025 |
| Dips Enterprise Ltd | Other services | 2019 |
| Dips Properties Limited | Real estate | 2000 |
| Direct Affinity Limited | Information & communication | 2010 |
| Direct 2 Communications Ltd | Information & communication | 2004 |
| Direct Choice Group Holdings Ltd | | 2000 |
| Direct Gifts Shop Ltd | Wholesale & retail | 2017 |
| Direct Journey Ltd | Transport & logistics | 2019 |
| Direct Metals Ltd | Wholesale & retail | 2026 |
| Directgreen Property Management Limited | Real estate | 1998 |
| Directway Cars Ltd | Transport & logistics | 2023 |
| Dirt Free Ltd | Administrative & support | 2021 |
| DIS Composites Limited | Manufacturing | 2016 |
| Discount Beds Direct Ltd | Wholesale & retail | 2019 |
| Discover Direct Limited | Wholesale & retail | 2013 |
| Discover Mini Ltd | Wholesale & retail | 2024 |
| Discreet Pest Control Limited | Administrative & support | 2003 |
| Dish Ltd | Wholesale & retail | 1996 |
| Disha & Associates Ltd | Administrative & support | 2024 |
| Dishiv Ltd | Real estate | 2025 |
| Dislo Limited | Wholesale & retail | 2017 |
| Disruptive Nanotechnology Limited | Wholesale & retail | 2014 |
| Dissonance Consulting Ltd | Professional & scientific | 2024 |
| Distinct Build Ltd | Construction | 2008 |
| District London Ltd | Other services | 2011 |