| D Webb Engineering Ltd | Wholesale & retail | 2024 |
| D Whiteman Supply Co. Limited | Professional & scientific | 2026 |
| D&M Engineering and Repair Services Ltd | Manufacturing | 2013 |
| D. Napier & SON Ltd | Extraterritorial | 2012 |
| D.E.P.Construction Services Ltd. | Construction | 2001 |
| D.G.Building (East Cambs) Ltd | Construction | 2013 |
| D.R. Stell & Co Limited | Real estate | 2017 |
| Dailey Group Holdings Limited | Financial services | 2026 |
| Dailey Group Property Limited | Financial services | 2026 |
| Daine Ltd | Wholesale & retail | 2023 |
| DAK Care Ltd | Health & social care | 2021 |
| Damien Vickers Photography Ltd | Professional & scientific | 2025 |
| Damnation Party Limited | Extraterritorial | 2015 |
| Dana Rotaru Ltd | Information & communication | 2026 |
| Dancing Blue Tiger Limited | Professional & scientific | 2017 |
| Danfc Partnership Limited | Real estate | 2015 |
| Daniel Legge Carpentry Limited | Manufacturing | 2018 |
| Daniel Macht LLP | | 2016 |
| Daniels & Sons (Balsham) Ltd | Construction | 2005 |
| Dapodual ES Limited | Health & social care | 2022 |
| Darlow Contract Services Ltd | Agriculture & fishing | 1999 |
| Darsha Noon Limited | Professional & scientific | 2012 |
| Dart Electrical Engineering Limited | Construction | 2001 |
| Dashend 21971 Limited | Extraterritorial | 2013 |
| Data Quality Management Group Limited | Professional & scientific | 1996 |
| Data Quality Management Limited | Professional & scientific | 2002 |
| DATA2 Limited | Professional & scientific | 2004 |
| Datam Architecture Limited | Financial services | 2022 |
| Davenport Media Limited | Manufacturing | 2020 |
| David Frear Plumbing & Heating Ltd | Construction | 2008 |
| David Harrison Handling Solutions Limited | Administrative & support | 2002 |
| David Robert Love Limited | Health & social care | 2015 |
| DAVJAM2 Limited | Health & social care | 2013 |
| Dawe Developments Limited | Construction | 1996 |
| Dawn Lamb Fitness Limited | Arts & recreation | 2016 |
| Day Developments Limited | Construction | 2001 |
| Days Holdings (Soham) Limited | Financial services | 2012 |
| DB Broadcast Holdings Ltd | Information & communication | 2014 |
| DB Broadcast Ltd | Information & communication | 1992 |
| DB Electrical and Building Services Limited | Construction | 1968 |
| DB Flat Roofing Limited | Construction | 2023 |
| DB Groundworks (Cambs) Ltd | Construction | 2021 |
| DB Industrial Roofing Limited | Construction | 2009 |
| DB Painting Decorating Ltd | Construction | 2025 |
| Dbounce Limited | Professional & scientific | 2021 |
| DCC Telecoms Limited | Information & communication | 2015 |
| DCH Management Services Limited | Professional & scientific | 2005 |
| DE Silang Ltd | Wholesale & retail | 2026 |
| Deanta UK Limited | Wholesale & retail | 1993 |
| Decisive IT LLP | | 2016 |
| Defy Expectations Limited | Professional & scientific | 2017 |
| Della Goccia Ltd | Wholesale & retail | 2023 |
| Dels Emporium Limited | Wholesale & retail | 2026 |
| DEM Projects Ltd | Administrative & support | 2014 |
| Demcom Holdings Limited | Administrative & support | 2024 |
| Demeter Technology Limited | Agriculture & fishing | 2007 |
| Dening Ltd | Professional & scientific | 2022 |
| Denmark Farm Ltd | Agriculture & fishing | 2015 |
| Dennis Trading Limited | Wholesale & retail | 2013 |
| Depner Immigration Limited | Professional & scientific | 2026 |
| Design Tree Limited | Information & communication | 2008 |
| Design Works Bureau Ltd | Professional & scientific | 2023 |
| DESPATCH4U Ltd | Administrative & support | 2010 |
| Destiny Gaming Limited | Extraterritorial | 2020 |
| Development Park Homes Limited | Hospitality | 2023 |
| Devrail Limited | Professional & scientific | 2012 |
| Dewsberry Gardens (Little Thetford) Residents Company Limited | Households | 2019 |
| DG Plumbing & Heating Ltd | Manufacturing | 2009 |
| DHJ Care Ltd | Health & social care | 2017 |
| Dhstyling Ltd | Wholesale & retail | 2026 |
| Diaconu Gheorghe Ltd | Wholesale & retail | 2021 |
| Diamond Vehicle Services (UK) Limited | Wholesale & retail | 2013 |
| Dice and Decks Fenland CIC | Arts & recreation | 2022 |
| Dietary Foods UK Ltd | Wholesale & retail | 2022 |
| Digital Edge Consulting Limited | Information & communication | 2025 |
| Dimmocks Cote Management Company Limited | Households | 2021 |
| Dion Gallichan Photography Ltd | Wholesale & retail | 2014 |
| Direct Access Supplies Limited | Construction | 1992 |
| Discovery Dock East Right to Manage Company Ltd | Households | 2018 |
| Dispute Resolution Services Limited | Other services | 2016 |
| Diva Corporation Limited | Professional & scientific | 1990 |
| Diversity Tennis CIC | Education | 2023 |
| DJ Cladding Services Ltd | Construction | 2026 |
| DJB Plumbing Heating & Air Conditioning Ltd | Construction | 2023 |
| DK Express Ltd | Wholesale & retail | 2023 |
| DKC Property Holdings Ltd | Financial services | 2020 |
| Dlane Design Ltd | Professional & scientific | 2025 |
| Dlane Manufacturing Ltd | Wholesale & retail | 2015 |
| Dlfm Limited | Wholesale & retail | 2025 |
| DMC Solutions Limited | Information & communication | 1998 |
| DMG Couriers Ltd | Transport & logistics | 2024 |
| DML3 Limited | Wholesale & retail | 2019 |
| Dolphin Appliance Care Limited | Manufacturing | 2001 |
| Domestic Abuse CIC | Administrative & support | 2025 |
| Domestic Abuse Education Limited | Education | 2023 |
| Domi Properties Limited | Administrative & support | 2017 |
| Double G Associates LLP | | 2003 |
| Double M Group Ltd | Construction | 2024 |
| Dougaltown Ltd | Hospitality | 2009 |
| Doxdesk Ltd | Information & communication | 2010 |