| Courtworx Sports Ltd | Wholesale & retail | 2018 |
| CPA Atelier Ltd | Wholesale & retail | 2024 |
| Craicshot Limited | Professional & scientific | 2020 |
| Craigfirst Limited | Information & communication | 2002 |
| Crisalida Limited | Education | 2005 |
| Cruisez Ltd | Extraterritorial | 2015 |
| Crums Limited | Manufacturing | 2025 |
| Custom Audio Designs Limited | Wholesale & retail | 2003 |
| D Build UP Ltd | Construction | 2013 |
| D&A Capital Ltd | Professional & scientific | 2021 |
| D&G (Hants) Ltd. | Real estate | 2021 |
| D. Dalton Carpentry & Joinery Ltd | Construction | 2012 |
| D.K. Freight Limited | | 1991 |
| Daisy Chain Ceremonies Ltd | Other services | 2021 |
| Daleham Consulting Ltd | Professional & scientific | 2013 |
| Daniel Jones Traditional Butchers Ltd | Wholesale & retail | 2026 |
| Darema Developments Ltd | Construction | 2025 |
| Darren Reeves Productions Ltd | Arts & recreation | 2019 |
| Davey Farms Limited | Professional & scientific | 2010 |
| David Graver Building & Property Services Ltd. | Construction | 2011 |
| David Graver Investment Co Ltd | Real estate | 2016 |
| David Graver Lettings Limited | Real estate | 2012 |
| David Jerome Entertainment Limited | Arts & recreation | 2017 |
| Davidstone Limited | Professional & scientific | 2022 |
| Dawn Houghton Upholstery Ltd | Manufacturing | 2025 |
| Dawn Houghton Upholstery Training Ltd | Education | 2025 |
| Day Nest Ltd | Information & communication | 2014 |
| DB Physiotherapy Ltd | Health & social care | 2024 |
| DC Solutions South West Limited | Administrative & support | 2014 |
| DC Training South West Limited | Administrative & support | 2017 |
| Deamarc Limited | Agriculture & fishing | 1982 |
| Dean Lanzante Limited | Professional & scientific | 2007 |
| Dean Smith 13 Limited | Professional & scientific | 2017 |
| Decision Point Ltd | Professional & scientific | 2018 |
| DECK42 Limited | Manufacturing | 2016 |
| Decoy Productions Limited | Information & communication | 2010 |
| Deepblueskies Limited | Information & communication | 2017 |
| Defence Solutions CPD Ltd | Education | 2025 |
| Delicious Creations Ltd | Manufacturing | 2020 |
| Delphis Consulting Limited | Professional & scientific | 2019 |
| Dent Horizon Limited | Information & communication | 2025 |
| Derwent Properties Limited | Real estate | 1954 |
| Designer Woodwork Limited | Manufacturing | 2005 |
| Desjoyaux (UK) Ltd | Extraterritorial | 2014 |
| Desjoyaux Ltd | Extraterritorial | 2014 |
| Desjoyaux Pools (UK) Ltd | Extraterritorial | 2014 |
| Desjoyaux Pools Ltd | Extraterritorial | 2014 |
| DG Green Works (Utilities) Limited | Agriculture & fishing | 2015 |
| DG Green Works Limited | Agriculture & fishing | 2014 |
| Diggers Club Ltd | Education | 2014 |
| Digicool Ltd | Professional & scientific | 2023 |
| Digital Breeze Limited | Information & communication | 2005 |
| Digital Greats Limited | Information & communication | 2011 |
| Digital Rage Limited | Information & communication | 2011 |
| Dillions Estates LLP | | 2017 |
| Dishevelled London Recordings Limited | Arts & recreation | 2019 |
| Display Case UK Ltd | Manufacturing | 2020 |
| Distribution and Management Services Limited | Professional & scientific | 2024 |
| Ditcham Park Enterprises Limited | Real estate | 2023 |
| Dito Software Limited | Information & communication | 2018 |
| Diveaway Travel Ltd | Financial services | 2024 |
| Dixon Balston Design Limited | Manufacturing | 2011 |
| DLW Friends LLP | | 2016 |
| Dmcveigh Ltd | Information & communication | 2018 |
| DME Group UK Ltd | Construction | 2026 |
| Dmwj Consultancy Limited | Health & social care | 2009 |
| DNB Commercial Limited | Information & communication | 2017 |
| Dolomite Brewery Ltd | Manufacturing | 2021 |
| Dottie Tots Limited | Education | 2016 |
| Downlands Farm Holidays Limited | Hospitality | 2023 |
| Dragon Books Ltd | Information & communication | 2015 |
| Dragon Indian Ltd | Hospitality | 2024 |
| Dragon SON Ltd | Hospitality | 2024 |
| Dragons 4 Health LLP | | 2023 |
| Dredgeking Limited | Professional & scientific | 2000 |
| Drum 2000 Limited | Arts & recreation | 1999 |
| Dual Medal Anaesthetic Services Limited | Health & social care | 2019 |
| Duncan Financial Services Ltd | Financial services | 2016 |
| Duncton Group Limited | Financial services | 2007 |
| Duski Scissors Ltd | Other services | 2026 |
| DWS Plumbing & Bathrooms Limited | Construction | 2023 |
| Dynamic Energy Solutions Holdings Ltd | Energy | 2019 |
| E & V Developments Ltd | Construction | 2025 |
| Earshot Limited | Other services | 2023 |
| Earthworks Trust Limited | Administrative & support | 1995 |
| East Hampshire Islamic Cultural Centre | Other services | 2024 |
| Easy Lifting Solutions Limited | Construction | 2018 |
| Ebox Electric Limited | Wholesale & retail | 2025 |
| Eco-Tech (Southern) Limited | Extraterritorial | 2011 |
| Ecology Works Limited | Professional & scientific | 2022 |
| Ecosse Musicals Limited | Information & communication | 2011 |
| Ecosse TV Productions Limited | Information & communication | 1999 |
| Ecovolt Renewables Ltd | Construction | 2022 |
| ED Fornieles Studios Ltd | Arts & recreation | 2018 |
| Edadvice Consulting Ltd | Education | 2010 |
| Edgeworth Medical Services Ltd | Health & social care | 2017 |
| Education Strategic Advisory Services Ltd | Professional & scientific | 2018 |
| Edward Sinclair Limited | Wholesale & retail | 1999 |
| EDX Technologies Ltd | Extraterritorial | 2024 |
| Edzed Limited | Information & communication | 2005 |