| Digital Hike Ltd | Information & communication | 2022 |
| Digital Investigations Limited | Information & communication | 2017 |
| Digital Media and Technology Solutions Ltd | Real estate | 2009 |
| Digital Mentality Ltd | Health & social care | 2018 |
| Digital Minds Technologies Ltd | Information & communication | 2024 |
| Digital Platform Inc Limited | Information & communication | 2024 |
| Digital Solutions & Insights Limited | Professional & scientific | 2024 |
| Digital Success Blueprint Limited | Professional & scientific | 2017 |
| Digital Tax Plus Limited | Professional & scientific | 2017 |
| Digital Tech Consulting Ltd | Information & communication | 2022 |
| Digital Transport Ltd | Water & waste | 2025 |
| Digital Wick Limited | Information & communication | 2015 |
| Digitall Print Services Limited | Manufacturing | 2010 |
| Digitall Trading Limited | Manufacturing | 2010 |
| Digitalmarkettradehub Limited | Wholesale & retail | 2025 |
| Digitise Your Work Ltd | Information & communication | 2022 |
| Dignified Care 24/7 Limited | Wholesale & retail | 2017 |
| Dignity Management Ltd | Households | 2026 |
| Digtrack Ltd | Construction | 2019 |
| Digxsphere Ltd | Information & communication | 2024 |
| Dija Forever Team Limited | Wholesale & retail | 2025 |
| Dikov Construction Limited | Construction | 2025 |
| DIL London Limited | Manufacturing | 2010 |
| DIL Soutions Limited | Information & communication | 2025 |
| Dilan Locum Limited | Wholesale & retail | 2024 |
| Dilawar & Sons Limited | Hospitality | 2013 |
| Dilawar Ltd | Construction | 2025 |
| Diligent Freelancer Limited | Professional & scientific | 2024 |
| Diligent Tech Ltd | Information & communication | 2025 |
| Dilli Haat Limited | Hospitality | 2006 |
| Dillon & White Ltd | Hospitality | 2018 |
| Dillon & White Properties Limited | Real estate | 2025 |
| Dilotte Ltd | Construction | 2023 |
| Dilraj Property UK Ltd | Real estate | 2026 |
| Dilute Trade Management Services Ltd | Hospitality | 2012 |
| DIM Contractors Limited | Construction | 2020 |
| Dima International Limited | Real estate | 1996 |
| Dimensions Developers Limited | Administrative & support | 2016 |
| Dimensionx Ltd | Information & communication | 2022 |
| Dimitar 77 Ltd | Construction | 2021 |
| Dina Group London Ltd | Transport & logistics | 2019 |
| Dinev 83 Ltd | Wholesale & retail | 2025 |
| Dinev's Q&E Removals Ltd | Administrative & support | 2019 |
| Dingi Ltd | Real estate | 2026 |
| Dingo Ice Ltd | Wholesale & retail | 2026 |
| Dinoco London Ltd | Professional & scientific | 2024 |
| Dinogio Limited | Wholesale & retail | 2015 |
| Dinu Properties Ltd | Real estate | 2021 |
| Dinvest B Ltd | Real estate | 2020 |
| Dioen Production Ltd | | 2010 |
| Dion Loft Conversions Ltd | Construction | 2019 |
| Dipalis Collection Ltd | Wholesale & retail | 2015 |
| Direct Alpine Properties Ltd | Real estate | 2024 |
| Direct Boot and Embroidery Limited | Wholesale & retail | 2022 |
| Direct Boot and Shoe Supplies Limited | Wholesale & retail | 1994 |
| Direct Car Panels Limited | Wholesale & retail | 2019 |
| Direct Security and Car Rental Ltd | Wholesale & retail | 2018 |
| Direct Sports Wholesale Limited | Manufacturing | 2025 |
| Direct Switch Ltd | Professional & scientific | 2012 |
| Direct VEG London Ltd | Wholesale & retail | 2014 |
| Directly Rent Ltd | Administrative & support | 2025 |
| Directly.Me Ltd | Information & communication | 2011 |
| Dirty Apron Ltd | Hospitality | 2012 |
| Disa Allsopp Limited | Administrative & support | 2017 |
| Disability Redbridge | Health & social care | 1994 |
| Discloseit Limited | Information & communication | 2025 |
| Discount Fireworks Ltd. | Wholesale & retail | 1999 |
| DISCOUNT1ST Ltd | Other services | 2021 |
| Discounts Direct Limited | Wholesale & retail | 2024 |
| Discover Brand Creation Limited | Arts & recreation | 2014 |
| Discreet Clothing Ltd | Wholesale & retail | 2022 |
| Display Cloud Limited | Information & communication | 2024 |
| Distef Ltd | Construction | 2017 |
| Distinctfine Limited | Professional & scientific | 1977 |
| District 64 Ltd | Wholesale & retail | 2025 |
| District Circle Limited | Real estate | 2019 |
| Distrowholesale Limited | Wholesale & retail | 2024 |
| Diten Limited | Professional & scientific | 2021 |
| Ditevi Group Limited | Financial services | 2020 |
| Ditevi Homes Limited | Real estate | 2019 |
| Ditevi Limited | Information & communication | 2008 |
| Ditevi Management Limited | Real estate | 2020 |
| Ditra Ltd | Wholesale & retail | 2021 |
| Ditta Properties LLP | | 2017 |
| DIU Traders Ltd | Other services | 2022 |
| Diva DEE Limited | Other services | 2019 |
| Diva Peek Ltd | Wholesale & retail | 2016 |
| DIVA1 Limited | Households | 2022 |
| Diverse Dialogues Ltd | Professional & scientific | 2025 |
| Diverse Fitness Ltd | Arts & recreation | 2021 |
| Diverse REC Paye Ltd | Administrative & support | 2024 |
| Diverse Talent Souls Limited | Arts & recreation | 2023 |
| Diverse Terrace Limited | Wholesale & retail | 2025 |
| Diversity Development Limited | Information & communication | 2013 |
| Divine Beauty Lounge Ltd | Other services | 2026 |
| Divine Begining Ltd | Wholesale & retail | 2010 |
| Divine Care Ltd | Health & social care | 2009 |
| Divine Community Care (DOM) Limited | Administrative & support | 2021 |
| Divine Community Care Limited | Health & social care | 2016 |
| Divine Day Centre and Respite Services | Health & social care | 2026 |