| Domec Professional Services Limited | Professional & scientific | 2014 |
| Domenyqe Limited | Transport & logistics | 2019 |
| Domestic Appliances 2 U Limited | Other services | 2025 |
| Domestic Commercial Security Ltd | Construction | 2024 |
| Domestic Maintenance Limited | Construction | 2018 |
| Domestic Support Services Ltd | Administrative & support | 2023 |
| Domestics Direct Repairs & Sales Limited | Wholesale & retail | 2025 |
| Domican Enterprise Limited | Administrative & support | 2012 |
| Dominic & Co Accountants Ltd | Professional & scientific | 2023 |
| Dominic and Associates Ltd | Professional & scientific | 2023 |
| Dominic Ioan Ltd | Transport & logistics | 2025 |
| Dominion Fitness Limited | Arts & recreation | 2025 |
| Dominique Moore Arts Limited | Arts & recreation | 2016 |
| Dominique Shaw Hair Ltd | Other services | 2025 |
| Dominium Property Group Ltd | Real estate | 2025 |
| Domino Corner Shop Ltd | Wholesale & retail | 2025 |
| Domino Nice Store Ltd | Wholesale & retail | 2022 |
| Dominus Ltd | Real estate | 2022 |
| Domnish Ltd | Financial services | 2023 |
| Domnow Transport Ltd. | Transport & logistics | 2018 |
| Dompro Ltd | Transport & logistics | 2019 |
| Domus Law Ltd | Administrative & support | 2020 |
| Domus Possessions Limited | Real estate | 2025 |
| Domus Regeneration Limited | Professional & scientific | 2000 |
| Domus Solutions Ltd | Other services | 2026 |
| Domy Convenience Ltd | Wholesale & retail | 2026 |
| DON Farmer & Sons (Suppliers) Ltd | Manufacturing | 2012 |
| DON Farmer & Sons Ltd | Construction | 2010 |
| Don's Creations Limited | Manufacturing | 2021 |
| Don's Rocket News Ltd | Wholesale & retail | 2014 |
| Don'T Bother the Bride Ltd | Information & communication | 2025 |
| Don'T Flop Entertainment Ltd | Arts & recreation | 2022 |
| Don'T X the Line CIC | Other services | 2010 |
| Donaghy Holdings Limited | Health & social care | 2021 |
| Donato & Paolo (Duke Street) Limited | Hospitality | 2023 |
| Donato & Paolo (Mauretania) Limited | Hospitality | 2023 |
| Donato & Paolo (Park Central) Limited | Hospitality | 2023 |
| Donato & Paolo Holding Co. Limited | Financial services | 2023 |
| Donbar Limited | Construction | 2026 |
| Dong XU Kirkby Limited | Hospitality | 2024 |
| Donhill Developments Ltd | Construction | 2018 |
| Donirati Ltd | Professional & scientific | 2026 |
| Donna Property Ltd | Real estate | 2019 |
| Donni Properties Limited | Real estate | 2023 |
| Donoghue Solicitors Limited | Professional & scientific | 2012 |
| Donovan & Tatham Ltd | Professional & scientific | 2017 |
| Donovan FP Ltd | Administrative & support | 2024 |
| Donquit Limited | Hospitality | 2019 |
| Dontfretit Ltd | Professional & scientific | 2023 |
| Donut Theatre Ltd | Hospitality | 2006 |
| DOO KI Clothing and Manufacturing (PVT) Ltd | Wholesale & retail | 2025 |
| Doocey Support Limited | Professional & scientific | 2012 |
| Doodle Architecture Ltd | Professional & scientific | 2020 |
| Doohpop Ltd | Professional & scientific | 2026 |
| Doolan Properties (NW) Ltd | Real estate | 2025 |
| Dooley Heating Plumbing GAS Limited | Construction | 2025 |
| Doon Shore Properties Ltd | Real estate | 2005 |
| Door Safety Services Ltd | Administrative & support | 2019 |
| Door to Door Direct Ltd | Wholesale & retail | 2024 |
| Door to Door Maintenance and Developments Ltd | Real estate | 2019 |
| Door Ventures Limited | Information & communication | 2016 |
| Doorsec Solutions Ltd | Administrative & support | 2025 |
| Dopamine Rooms CIC | Education | 2024 |
| Dora Facilities & Co Ltd | Construction | 2025 |
| Doran Contractors (NW) Limited | Construction | 2018 |
| Doran Estates Ltd | Real estate | 2018 |
| Doran Gallagher Estates 2 Ltd | Real estate | 2023 |
| Doran Gallagher Estates 3 Ltd | Real estate | 2023 |
| Doran Gallagher Estates 4 Ltd | Real estate | 2023 |
| Doran Gallagher Estates 5 Ltd | Real estate | 2024 |
| Doran Gallagher Estates 6 Ltd | Real estate | 2024 |
| Doran Gallagher Estates Ltd | Real estate | 2020 |
| Doran Investments Limited | Real estate | 2019 |
| Doran Kennedy Rentals Limited | Real estate | 2017 |
| Doran Plant (UK) Limited | Administrative & support | 2025 |
| Dorathy and J Limited | Wholesale & retail | 2022 |
| Dorcas and Priscilla Ltd | Other services | 2012 |
| Doreen Elsey Trading Limited | Professional & scientific | 2022 |
| Dori Media Mentor Ltd | Professional & scientific | 2025 |
| Dorin Trans Ltd | Transport & logistics | 2016 |
| Dorothy Creative Limited | Arts & recreation | 2008 |
| Dorothy Watson Trading Limited | Professional & scientific | 2018 |
| Dorrison's Ltd | Other services | 2020 |
| Dorrow Lettings Ltd | Real estate | 2024 |
| Dorset Cruises (Poole) Limited | Transport & logistics | 2019 |
| Dorward Intelligent Buildings Limited | Construction | 2014 |
| Doré Garden Designs Limited | Professional & scientific | 2022 |
| Dosafil Limited | Manufacturing | 2017 |
| Dosafil Residential Technologies Ltd | Professional & scientific | 2016 |
| Dosco Overseas Engineering Limited | Manufacturing | 1956 |
| Doska Trade Ltd | Transport & logistics | 2021 |
| Dost Hot Food Ltd | Hospitality | 2025 |
| Dostana Mumbai Cafe Ltd | Hospitality | 2014 |
| Dostana Restaurant Ltd | Hospitality | 2019 |
| DOT Hair Ltd | Other services | 2019 |
| DOT Legna Ltd | Administrative & support | 2026 |
| Dot.Ice Ltd | Manufacturing | 2025 |
| Dotcom People Ltd | Wholesale & retail | 2020 |
| Dotted Line Touring Services Ltd | Arts & recreation | 2024 |
| Dottie’S North West Ltd | Wholesale & retail | 2025 |