| Domina Holding LP | | 2015 |
| Dominans DEV LP | | 2016 |
| Dominateks Impex LP | | 2011 |
| Dominic Supreme LP | | 2017 |
| Dominic Systems LP | | 2013 |
| Dominion City Edinburgh Ltd | Other services | 2025 |
| Dominion Marketing Ltd | Professional & scientific | 2021 |
| Dominion Ship Services LP | | 2017 |
| Dominion Traders & Company | | 1993 |
| Dominion Wholesale Ltd | Wholesale & retail | 2022 |
| Dominius LP | | 2013 |
| Domino Europe L.P. | | 2009 |
| Domino Holdings L.P. | | 2009 |
| Domino International LP | | 2018 |
| Dominum Europe LP | | 2013 |
| Dominum Financing LP | | 2016 |
| Dominum Holding LP | | 2017 |
| Dominus Global LP | | 2015 |
| Dominus Group LP | | 2017 |
| Domipoint UK Limited | Wholesale & retail | 2024 |
| Domiro Business LP | | 2013 |
| Dommac Ltd | Real estate | 2023 |
| Domolity Trade LP | | 2014 |
| Domora Vitae Limited | Hospitality | 2025 |
| Domus & Brick Ltd | Real estate | 2026 |
| Domus Agni Limited | Real estate | 2020 |
| DON @ Tokyo Limited | Hospitality | 2023 |
| DON Enterprise Ltd | Real estate | 2001 |
| DON Pass LP | | 2017 |
| DON Pollo Peri Peri Ltd | Hospitality | 2019 |
| DON SLP | | 1997 |
| DON Slush Ltd | Manufacturing | 2022 |
| Donald NOX LP | | 2016 |
| Donald Traders & Co | | 2002 |
| Donald Wilson Investments Limited | Extraterritorial | 2013 |
| Donaldson Holdings Limited | Real estate | 2018 |
| Donaldson James Ltd | Administrative & support | 2021 |
| Donaldson Properties Limited | Real estate | 1961 |
| Donaldson Property Ltd | Real estate | 2021 |
| Donaldson, Palmer & Ellis Ltd | Manufacturing | 2025 |
| Donate Furniture Ltd | Water & waste | 2022 |
| Donatello Limited Partnership | | 2008 |
| Donaway Enterprises L.P. | | 2011 |
| Donberg Business LP | | 2016 |
| Doncal Group Ltd | Real estate | 2022 |
| Done Media Concept & Branding Services Ltd | Professional & scientific | 2024 |
| Donegal Partners LP | | 2014 |
| Dongo Group LP | | 2016 |
| Donington Trading LP | | 2013 |
| Donleavy Investment Trading (Scotland) Partnership SP | | 2022 |
| Donlevy Distributors Ltd | Wholesale & retail | 2026 |
| Donlevy Mortgages Ltd | Financial services | 2026 |
| Donn A'Choille Ltd | Information & communication | 2025 |
| Donnelly Capital SLP | | 2005 |
| Donnelly Dynamics Limited | Other services | 2025 |
| Donnelly Family Office | Other services | 2023 |
| Donsom LP | | 2012 |
| Donwork Systems LP | | 2013 |
| Doog Developers Ltd | Information & communication | 2026 |
| Dook Ltd | Manufacturing | 2019 |
| Dookers Nook Ltd | Real estate | 2022 |
| Doomed From the Start Ltd | Information & communication | 2026 |
| Doonbye Properties Limited | Real estate | 1967 |
| Door Entry System Services Ltd | Administrative & support | 2020 |
| Door in the Wall Arts Access C.I.C. | Professional & scientific | 2022 |
| Doorway Property Ltd | Extraterritorial | 2019 |
| Doosis Ltd | Information & communication | 2021 |
| Doppelganger 33 Limited | Manufacturing | 2009 |
| Dopteks Management LP | | 2012 |
| DOR Communication LP | | 2015 |
| Dora Associates LP | | 2012 |
| Dorada Property Ltd | Real estate | 2022 |
| Doran Business LP | | 2015 |
| Doran LP | | 2013 |
| Doravilla SP | | 2002 |
| Dorback Conservation Limited | Real estate | 2024 |
| Dorco Ltd | Wholesale & retail | 2022 |
| Dore Assets LP | | 2013 |
| Dore Enterprises LP | | 2016 |
| Dorelia LP | | 2016 |
| Doremi Impex LP | | 2016 |
| Doremi Reform Holdings LP | | 2018 |
| Doresa Limited | Wholesale & retail | 2025 |
| Dorfberg LP | | 2014 |
| Dorfwork Systems LP | | 2014 |
| Dori Cafe Ltd | Hospitality | 2024 |
| Dorian Real Estate LP | | 2008 |
| Doriath Holding Ltd. | Administrative & support | 2019 |
| Doricmor Limited | Manufacturing | 1990 |
| Doriland Investments LP | | 2011 |
| Dorimex Corp LP | | 2016 |
| Dork Commerce Ltd | Wholesale & retail | 2025 |
| Dormant (G4) Limited | Professional & scientific | 1973 |
| Dormiston Union LP | | 2014 |
| Dorn Capital LP | | 2012 |
| Dornoch Investments | Financial services | 2010 |
| Dorridge Solutions LP | | 2013 |
| Dorrington Group LP | | 2015 |
| Dorsal Trading Experts LP | | 2015 |
| Dorsbor Corporation LP | | 2011 |