| Danywenallt Ltd | Hospitality | 2026 |
| Dara Intellitech Ltd | Information & communication | 2024 |
| Dara People Ltd | Administrative & support | 2023 |
| Darden Transport Ltd | Transport & logistics | 2024 |
| Dare Hairdressing Limited | Other services | 2010 |
| Dark Horse Property Ltd | Real estate | 2016 |
| Dark Side of the Toolbox Ltd | Wholesale & retail | 2018 |
| Darkchild Productions Ltd | Arts & recreation | 2014 |
| Darlice Healthcare Ltd | Health & social care | 2023 |
| Darnell Place (Woodcote) Management Company Limited | Households | 2020 |
| Darwesh Diabetes and Endocrinology Research Organisation UK Ltd | Wholesale & retail | 2025 |
| DAS Financial Solutions Ltd | Financial services | 2025 |
| DAS Manufacturing Services Ltd | Extraterritorial | 2019 |
| Dashmesh Practice Ltd | Health & social care | 2015 |
| Dashwood (Banbury) Management Company Limited | Households | 2002 |
| Dashwood Freehold Company Limited | Households | 2004 |
| Data Bees Consultancy Ltd | Information & communication | 2024 |
| Data Centre Investments Ltd | Information & communication | 2012 |
| Data Counts Ltd | Other services | 2017 |
| Data Enigma Ltd | Information & communication | 2021 |
| Data Network Services Ltd | Information & communication | 2015 |
| Datafortune Limited | Information & communication | 2021 |
| Dataracity Limited | Professional & scientific | 2025 |
| Dataracks Industries Limited | Manufacturing | 2025 |
| Dataxelevate Consulting Limited | Information & communication | 2025 |
| Davard Management Ltd | Professional & scientific | 2019 |
| Dave Inc Limited | Professional & scientific | 2024 |
| David Farms Limited | Agriculture & fishing | 1996 |
| David Griffiths & Co Ltd | Professional & scientific | 2026 |
| David Halliday Ltd | Wholesale & retail | 2012 |
| David Hicks Consultants Ltd | Professional & scientific | 2009 |
| David J Green Ltd | Wholesale & retail | 2017 |
| David Nials Limited | Transport & logistics | 2015 |
| David Peake Limited | Professional & scientific | 2006 |
| David Trustees Limited | Extraterritorial | 2008 |
| Davis Financial Consulting Limited | Financial services | 2013 |
| Davronov & Sons Ltd | Construction | 2022 |
| Dawid's Exotic Farm Ltd | Wholesale & retail | 2025 |
| Dawnray Management Company Limited | Financial services | 2000 |
| Day-Timers Europe Limited | Extraterritorial | 1994 |
| Dayla Holdings Limited | Manufacturing | 1961 |
| Dayla Limited | Manufacturing | 1943 |
| Dayntic Limited | Real estate | 1973 |
| Days of Antioch Ltd | Wholesale & retail | 2022 |
| Daytop Multicultural Centre CIC | Information & communication | 2020 |
| Dazzling Dog Groomers Ltd | Other services | 2020 |
| Dazzon Limited | Hospitality | 2016 |
| DB Coaching & Consultancy Limited | Professional & scientific | 2012 |
| DB Services Cleaning Limited | Other services | 2026 |
| DB Services House Renting Ltd | Real estate | 2024 |
| DBD Builders Ltd | Construction | 2022 |
| DBP Solutions Limited | Administrative & support | 2005 |
| DBX Dance Ltd | Arts & recreation | 2025 |
| DC Architectural Limited | Wholesale & retail | 2025 |
| DC Creations Incorporated Ltd | Professional & scientific | 2023 |
| DC Power & Lighting Limited | Construction | 2017 |
| DC Production House Limited | Professional & scientific | 2013 |
| Dcon Ltd | Professional & scientific | 2025 |
| DD Access Ltd | Manufacturing | 2022 |
| DD Commissioning Ltd | Construction | 2019 |
| DD Transport Ltd | Transport & logistics | 2019 |
| DDB Financial Solutions Ltd | Professional & scientific | 2017 |
| DDE Records Ltd | Information & communication | 2003 |
| Ddml Systems Ltd | Other services | 2022 |
| DE Associated Network Limited | Construction | 2021 |
| DE Carpentry and Construction Ltd | Manufacturing | 2023 |
| DE Novo Cars Ltd | Wholesale & retail | 2025 |
| DE Project Consulting Ltd | Extraterritorial | 2010 |
| DE Roti Kitchen Limited | Hospitality | 2025 |
| DE Soutter Medical Finance Limited | Financial services | 2018 |
| DE Soutter Medical Limited | Manufacturing | 1996 |
| DE Winter Interiors Ltd | Professional & scientific | 2022 |
| Dead Universe Comics Limited | Wholesale & retail | 2016 |
| Deadgoodesigns Limited | Arts & recreation | 2000 |
| Dealership Cleaning Services Holdings Limited | Financial services | 2025 |
| Dealership Cleaning Services Limited | Administrative & support | 2005 |
| Deals Bargain Limited | Wholesale & retail | 2024 |
| Dearn Brothers Contracting Limited | Administrative & support | 2021 |
| Decara Home Limited | Wholesale & retail | 2013 |
| Decency Care Services Ltd | Health & social care | 2022 |
| Decor Instinct Limited | Wholesale & retail | 2026 |
| Decorare Limited | Construction | 2003 |
| Decoy Farming Limited | Agriculture & fishing | 2014 |
| Decree LEX Global Ltd | Professional & scientific | 2025 |
| Dee-Eclat Consultancy Ltd | Information & communication | 2017 |
| Deekay Developments (Chinnor) Limited | Real estate | 1984 |
| Deemb Ltd | Manufacturing | 2020 |
| Deemed Positive Limited | Real estate | 2019 |
| Deep in Wood Limited | Manufacturing | 2010 |
| Deep Reality Limited | Information & communication | 2022 |
| Defaqto Group Limited | Professional & scientific | 2005 |
| Defaqto Ltd | Professional & scientific | 1993 |
| Defaqtomedia Limited | Information & communication | 1995 |
| Defence Security Services Ltd | Administrative & support | 2019 |
| Defense Soap UK Limited | Wholesale & retail | 2015 |
| Defty Lefty Ltd | Administrative & support | 2013 |
| DEG Home Services Ltd | Construction | 2022 |
| Deimos Industries Ltd | Professional & scientific | 2015 |
| DEL Boyz Ltd | Transport & logistics | 2023 |
| Delhicious Sweets & Savouries Limited | Hospitality | 2026 |