| Donki Catering Limited | Hospitality | 2025 |
| Donna Jay's Bordeauxs Limited | Other services | 2016 |
| Donna Jays Celebrity K9S Limited | Other services | 2025 |
| Donnue Cleaning Services Ltd | Other services | 2021 |
| Donny Media Tech Limited | Professional & scientific | 2025 |
| Donohoe Solutions Limited | Other services | 2025 |
| Donovan Property Services Limited | Real estate | 2023 |
| Dont Wait for the Opportunity Create IT Ltd | Administrative & support | 2023 |
| Dontfret Media Limited | Professional & scientific | 2013 |
| Dontwastemoney.Co.Uk Limited | Professional & scientific | 2025 |
| Donut N DIP Limited | Hospitality | 2025 |
| Donuts N Chai Limited | Hospitality | 2021 |
| Donya Co-Operation Limited | Administrative & support | 2013 |
| Donya Stone Bakery Ltd | Hospitality | 2022 |
| Donya Travel Limited | Administrative & support | 2008 |
| Dooland Limited | Real estate | 2013 |
| Dooley and Saint Limited | Professional & scientific | 2010 |
| Doomi Clear Limited | Wholesale & retail | 2025 |
| Door Drop Solutions Ltd | Professional & scientific | 2018 |
| Door Frames Ltd | Manufacturing | 2025 |
| Doorbell Pictures Limited | Information & communication | 2024 |
| Doorfit Holdings Ltd | Financial services | 2021 |
| Doorfit Limited | Professional & scientific | 1997 |
| Doorstep Deals Ltd | Professional & scientific | 2019 |
| Doorway to Fashion Limited | Administrative & support | 2017 |
| Dopamean Limited | Information & communication | 2020 |
| Dopania Ltd | Professional & scientific | 2022 |
| Dopano Family Holdings Limited | Financial services | 2026 |
| Dopat Medical Services Ltd | Health & social care | 2008 |
| Dope Games Ltd | Information & communication | 2018 |
| Dope Passion Limited | Wholesale & retail | 2022 |
| DOR Opco Realisations Limited | Wholesale & retail | 2014 |
| Dora City Limited | Hospitality | 2024 |
| Dora PAN Limited | Hospitality | 2024 |
| Dorala Ltd | Hospitality | 2016 |
| Dorcas.G.N.F Limited | Health & social care | 2022 |
| Dorchester Networking Limited | Wholesale & retail | 2013 |
| Dordon House 223 Ltd | Hospitality | 2022 |
| Doreen Life Events Ltd | Hospitality | 2016 |
| Dorge Integrated Concepts Limited | Wholesale & retail | 2025 |
| Dorian Group Ltd | Administrative & support | 2026 |
| Doric Payroll Software Limited | Administrative & support | 2024 |
| Dormann Bestattungen Limited | Administrative & support | 2008 |
| Dormant 08252225 Ltd | Professional & scientific | 2012 |
| Dormant 10761755 Ltd | Extraterritorial | 2017 |
| Dormant 11553085 Ltd | Professional & scientific | 2018 |
| Dormara Care and Support Limited | Administrative & support | 2024 |
| Dornanden Limited | Administrative & support | 2013 |
| Dorosen Events Limited | Arts & recreation | 2024 |
| Dorothy House Residential Ltd | Health & social care | 2024 |
| Dorothy's Gate Management Limited | Households | 2004 |
| Dorridge Fish Bar Limited | Real estate | 2019 |
| Dorridge Holdings Limited | Real estate | 2019 |
| Dorrington Academy Trust | Education | 2012 |
| Dorset and Wessex Health Limited | Health & social care | 2004 |
| DOS Passos Limited | Real estate | 2022 |
| Dosanjh Properties (Birmingham) Limited | Real estate | 2010 |
| Dosanjh Wholesale Ltd | Wholesale & retail | 2025 |
| Dose of Love Care Ltd | Health & social care | 2023 |
| Doseley Park Residents Management Company Limited | Households | 2015 |
| Doski Investments Limited | Real estate | 2019 |
| Dosmi Limited | Education | 2023 |
| Dost Bobshop Ltd | Wholesale & retail | 2022 |
| Dost Builder Ltd | Construction | 2026 |
| Dostan Ltd | Hospitality | 2025 |
| Dosthill Gate Management Company Limited | Households | 2023 |
| Dosthill Land Limited | Extraterritorial | 2009 |
| DOT 2 Plumb Ltd | Construction | 2026 |
| DOT ALT Events Ltd | Information & communication | 2022 |
| DOT Digital Creative Ltd | Information & communication | 2020 |
| DOT Hub Limited | Information & communication | 2018 |
| Dotandat Ltd | Information & communication | 2021 |
| Dote Property Relocation Ltd | Hospitality | 2024 |
| Doti Craft Ltd | Manufacturing | 2023 |
| Dottech Ltd | Wholesale & retail | 2024 |
| Dotted Eyes Holdings Limited | Information & communication | 2008 |
| Dotted Eyes Limited | Information & communication | 2002 |
| Dottie's Playhouse Ltd | Hospitality | 2025 |
| Double a Real Estates Ltd | Real estate | 2024 |
| Double a RON Ltd | Construction | 2015 |
| Double Black Limited | Information & communication | 2019 |
| Double Buzy Limited | Administrative & support | 2017 |
| Double Diamond Gaming Limited | Arts & recreation | 2009 |
| Double Diamond Group Limited | Financial services | 2025 |
| Double Dragon Investment Company Ltd | Real estate | 2019 |
| Double M Shine Cleaning Ltd | Administrative & support | 2026 |
| Double Ocean Services LP | | 2017 |
| Double S Investment Limited | Real estate | 2026 |
| Double V FIX Ltd | Construction | 2022 |
| Double V Ltd | Real estate | 2026 |
| Double X Ltd | Financial services | 2020 |
| Double Your Success Ltd | Professional & scientific | 2013 |
| DOUBLE55 Limited | Administrative & support | 2024 |
| Doublebeescatering Limited | Hospitality | 2023 |
| Dough & Fire Ltd | Hospitality | 2025 |
| Dough 4 Dough Ltd | Hospitality | 2024 |
| Dough Town Ltd | Hospitality | 2026 |
| Doughlicious Desserts & Pizza's Ltd | Wholesale & retail | 2019 |
| Doughnutz Limited | Wholesale & retail | 2022 |
| Douglas Deliveries Ltd | Transport & logistics | 2019 |