| Darwin CX UK Ltd | Information & communication | 2025 |
| Daryl Jacob Racing Limited | Arts & recreation | 2007 |
| Daryus Express Ltd | Transport & logistics | 2021 |
| DAS M&E Services Ltd | Construction | 2008 |
| Dash Cleaning (Midlands) Ltd | Administrative & support | 2017 |
| Dash Logistic Limited | Transport & logistics | 2023 |
| Dashwood Apartments Limited | Hospitality | 1994 |
| Dasource Collections Ltd | Wholesale & retail | 2025 |
| Dasvideolab Ltd | Information & communication | 2021 |
| DAT Business Solution Ltd | Professional & scientific | 2017 |
| Data Management Support Limited | Administrative & support | 2013 |
| Data Store 365 Limited | Information & communication | 2005 |
| Data Yogi Ltd | Information & communication | 2025 |
| Database for Business Ltd | Information & communication | 1998 |
| Datagene Analytics Limited | Information & communication | 2019 |
| Datasense Consulting Limited | Professional & scientific | 2019 |
| Datatexolutions Ltd | Information & communication | 2025 |
| Dataviz Ltd | Wholesale & retail | 2018 |
| Dats Print Services Limited | Manufacturing | 1996 |
| Datum Point Construction Ltd | Construction | 2016 |
| Dauntless Project Limited | Education | 2016 |
| DAV & GET Care Limited | Health & social care | 2015 |
| Davburn (U.K.) Limited | Wholesale & retail | 1992 |
| Davdumi Trade Limited | Administrative & support | 2025 |
| Dave & Dave Fruit and VEG Ltd | Wholesale & retail | 2021 |
| Dave & Jason Cowell Carpentry & Joinery Limited | Construction | 2024 |
| Dave Pearce Electrical Solutions Limited | Construction | 2014 |
| Dave Regan & Associates Ltd | Professional & scientific | 2026 |
| Davelcom Ltd | Information & communication | 2013 |
| Davenport Global Trading Limited | Transport & logistics | 2004 |
| Daventry Area Properties for YOU Limited | Real estate | 2016 |
| Daventry Healthcare Ltd | Health & social care | 2005 |
| Daventry Pallets Ltd | Wholesale & retail | 2011 |
| Daventry Partitioning Services Limited | Construction | 1985 |
| Daventry Scaffolding Services Limited | Construction | 1994 |
| Daventry Tool Hire Ltd | Administrative & support | 2022 |
| Davey Day Care Ltd | Health & social care | 2015 |
| Davey's Food Limited | Hospitality | 2025 |
| Davicar Ltd | Transport & logistics | 2020 |
| David & Daniel Properties Ltd | Real estate | 2025 |
| David & Daniel Services Ltd | Health & social care | 2015 |
| David 93 Transport Ltd | Transport & logistics | 2019 |
| David a Bradley Limited | Transport & logistics | 1987 |
| David Adrian Ltd | Transport & logistics | 2019 |
| David Ayres Limited | Other services | 1995 |
| David Brown Hairdressing & Aesthetics Ltd | Other services | 2022 |
| David C Noble Limited | Professional & scientific | 2012 |
| David C. Fowkes (Northampton) Limited | Construction | 1999 |
| David Collins Holdings Limited | Professional & scientific | 2016 |
| David Cousins Limited | Real estate | 2003 |
| David Edwin Mason Limited | Other services | 2025 |
| David G Brice Limited | Information & communication | 2019 |
| David Gooden Ltd | Construction | 2002 |
| David Grey & Co Limited | Professional & scientific | 1999 |
| David Haddon Ltd | Education | 2016 |
| David Homewood (Plant Hire) Limited | | 1976 |
| David Jacobs (UK) Limited | Professional & scientific | 2004 |
| David Kent Connect Limited | Information & communication | 2012 |
| David Mason Financial Planning LLP | | 2012 |
| David Mcgann Motor Spares and Accessories Limited | Wholesale & retail | 1973 |
| David NYE Ltd | Arts & recreation | 2014 |
| David Player Construction Limited | Construction | 2023 |
| David Purches Limited | Manufacturing | 2016 |
| David RO Logistic Ltd | Transport & logistics | 2023 |
| David Sabin Properties Limited | Real estate | 2012 |
| David Smith Associates LLP | | 2022 |
| David Somerville Design Ltd | Professional & scientific | 2015 |
| David Thomas Limited | Extraterritorial | 2009 |
| David Trevor Consulting Limited | Professional & scientific | 2022 |
| David Walker (Professional Services) Limited | Hospitality | 2018 |
| David Ward & Co Solicitors Limited | Professional & scientific | 2017 |
| David Williams I F a Holdings Limited | Financial services | 2019 |
| David Williams I F a Limited | Professional & scientific | 2003 |
| David Williams IFA Mortgage & Insurance Services Ltd | Professional & scientific | 2013 |
| Davide Master Ltd | Wholesale & retail | 2025 |
| Davie Pro Fitness Ltd | Arts & recreation | 2026 |
| Davies Crystal Cleaning Ltd | Manufacturing | 2026 |
| Davimar Auto Ltd | Wholesale & retail | 2018 |
| Davis Cash & Company Limited | Manufacturing | 1925 |
| Dawid Paszkowski Limited | Transport & logistics | 2011 |
| Dawn Farm Foods (UK) Limited | Wholesale & retail | 1994 |
| Dawn Farms Distribution UK Limited | Transport & logistics | 2020 |
| Dawn PAY Ltd | Administrative & support | 2026 |
| Dawn Photonics Ltd | Manufacturing | 2023 |
| Dawson Management Limited | Real estate | 2012 |
| Dawson Properties (Holdco) Limited | Financial services | 2024 |
| Dawson Properties Limited | Real estate | 1996 |
| Dawson Property Developments Limited | Real estate | 1997 |
| Dawson Property Investments Limited | Real estate | 2020 |
| DAY2DAY Business Group Ltd | Wholesale & retail | 2019 |
| Daya&Khan Ltd | Hospitality | 2025 |
| Dayak Limited | Other services | 2016 |
| Dayi Construction Ltd | Construction | 2025 |
| Daylee Ltd | Transport & logistics | 2008 |
| Dayton Court Management Company Limited | Real estate | 1986 |
| Dazi Trading Ltd | Wholesale & retail | 2025 |
| Dazzler Media Limited | Information & communication | 2013 |
| DB Fractional Ltd | Professional & scientific | 2025 |
| DB Helicopters Ltd | Administrative & support | 2016 |
| DB Office & Residential Cleaning Ltd | Administrative & support | 2024 |