| D.N.H Commercial Properties Ltd | Real estate | 2022 |
| D1 CUT Limited | Other services | 2017 |
| Daalder Ltd | Financial services | 2024 |
| DAB Flooring Limited | Wholesale & retail | 2012 |
| DAB Orthopaedics Limited | Health & social care | 2020 |
| Dagitec Ltd | Information & communication | 2019 |
| Daijun Consulting Ltd | Information & communication | 2025 |
| Daisy Commercial Limited | Administrative & support | 2026 |
| Daisy Farris Dance Collective Ltd | Arts & recreation | 2016 |
| Daisy Maid South East Ltd | Other services | 2013 |
| DAJ Residential Property Investments Limited | Administrative & support | 2014 |
| Daliah 91 Ltd | Other services | 2023 |
| Dalton Rentals Limited | Real estate | 2021 |
| Damien J Jones Limited | Financial services | 2017 |
| Damp & Timber Property Services Limited | Construction | 2024 |
| Damp Busters South East Ltd | Construction | 2015 |
| DAN Rodgers Ltd | Information & communication | 2011 |
| Daniel Barrett Decorating Services Limited | Construction | 2003 |
| Daniel O'Leary Colorectal Practice Ltd | Health & social care | 2018 |
| Daniel Wickens Limited | Extraterritorial | 2016 |
| Daphne Tsitoura Consultancy Ltd | Professional & scientific | 2019 |
| Dapper Dans (Tonbridge) Limited | Other services | 2007 |
| Darbyshire Developments Limited | Construction | 2024 |
| Daric Dent Ltd | Health & social care | 2026 |
| Darkwood Commercial Finance Ltd | Financial services | 2011 |
| Dart Castings Limited | Wholesale & retail | 2007 |
| Dartenya Limited | Financial services | 2006 |
| Data Management System Ltd | Professional & scientific | 2024 |
| Datapoint Integration Ltd | Information & communication | 2012 |
| Datasmart Consultancy Ltd | Information & communication | 2017 |
| Datec International Limited | Wholesale & retail | 2002 |
| Dave Cole Electrical Installations Limited | Construction | 2008 |
| Davenport Building Solutions Limited | Construction | 2010 |
| Davenport Strategic Solutions Ltd | Administrative & support | 2017 |
| David Browne Limited | Real estate | 2010 |
| David Building Services 2010 Ltd | Construction | 2026 |
| David Ferns Builders Ltd | Construction | 2007 |
| David Hole IT Limited | Information & communication | 2013 |
| David James Accountancy Services Ltd | Professional & scientific | 2009 |
| David Oakman & Sons Limited | Wholesale & retail | 2006 |
| David Paul Witcher Ltd | Extraterritorial | 2022 |
| David Rees Medical Ltd | Health & social care | 2024 |
| Dawning Care Ltd | Health & social care | 2023 |
| Dawnsky UK Limited | Wholesale & retail | 2000 |
| Daylightuk Ltd | Wholesale & retail | 2025 |
| Days With Dottie Ltd | Other services | 2024 |
| Dazl Hair Ltd | Other services | 2010 |
| DB10 Ltd | Other services | 2016 |
| DC Access Systems Limited | Construction | 2009 |
| DC Investment Properties Ltd | Real estate | 2025 |
| DC Roofing & Construction Limited | Construction | 2018 |
| Dcadla Solutions Ltd | Energy | 2021 |
| DCR RAD Ltd | Health & social care | 2025 |
| DD Prideaux Ltd | Professional & scientific | 2023 |
| DE Lissac Limited | Real estate | 2014 |
| DE Souza Psychiatry Ltd | Health & social care | 2020 |
| Deacon Group Holdings Limited | Professional & scientific | 1974 |
| Dean Leak Performance Coaching Ltd | Arts & recreation | 2020 |
| Debbie's Villas Limited | Administrative & support | 2012 |
| Decana Ltd | Information & communication | 2026 |
| Decarbonate Limited | Professional & scientific | 2023 |
| Decent Energy Ltd | Energy | 2023 |
| Declan Russell Ltd | Agriculture & fishing | 2022 |
| Deco Consulting Limited | Administrative & support | 2023 |
| Decoy Music Ltd | Information & communication | 2019 |
| Deeks Evans Audit Services Limited | Professional & scientific | 2010 |
| Deep Impact Innovations Limited | Information & communication | 2014 |
| Defcorp Limited | Administrative & support | 2008 |
| Defender Consultants Limited | Construction | 2020 |
| Defenderhomes Ltd | Real estate | 2025 |
| Delaneymethod Web Development Ltd | Administrative & support | 2013 |
| Delete Ventures Ltd | Arts & recreation | 2023 |
| Delivery House Consulting Limited | Information & communication | 2025 |
| Delphin Maritime Limited | Administrative & support | 2016 |
| Dengi Ventures Limited | Health & social care | 2008 |
| Denise Chaffer Consultancy Ltd | Professional & scientific | 2024 |
| Denmac Realty Limited | Real estate | 1963 |
| Denmark House Limited | Households | 2013 |
| Dental Boutique Ltd | Health & social care | 2025 |
| Dentisphere Limited | Health & social care | 2026 |
| Depole Consulting Limited | Manufacturing | 2010 |
| Derby Developments Limited | Construction | 2017 |
| Dermatologist London Ltd | Health & social care | 2013 |
| Derment Ltd | Health & social care | 2019 |
| Derrick MAY Farms Limited | Agriculture & fishing | 1959 |
| Descriptive Limited | Professional & scientific | 2012 |
| Design a Head (Tunbridge Wells) Ltd | Other services | 2015 |
| Design a Head Limited | Other services | 2011 |
| Design for Disability Ltd | Arts & recreation | 2017 |
| Design Perks Ltd | Professional & scientific | 2014 |
| Destiny Infosolutions Ltd | Information & communication | 2011 |
| Detail Driven Limited | Wholesale & retail | 2024 |
| Development Homes One Limited | Construction | 2020 |
| Development Homes Two Limited | Construction | 2020 |
| Developments (Folkestone) Limited | Households | 1958 |
| Devlan Limited | Hospitality | 2016 |
| Devlinko Ltd | Information & communication | 2024 |
| Dews Creatives Ltd | Information & communication | 2026 |
| DFP Impex Limited | Financial services | 2019 |
| Diamondrange Limited | Financial services | 1998 |