| Boudicas Land Ltd | Real estate | 2021 |
| Boundaries Ltd | Construction | 2021 |
| Bradders Ltd | Construction | 2017 |
| Brewer Broadcast Ltd | Information & communication | 2022 |
| Bridge Taxi Cambridge Limited | Transport & logistics | 2025 |
| Bridge Transitions Limited | Professional & scientific | 2024 |
| Brinkley Aircraft Services Limited | Manufacturing | 1997 |
| Brinkley Aviation Limited | Administrative & support | 2010 |
| Brook Lane Services Limited | Professional & scientific | 2004 |
| Broome Signs (Manufacturing) Limited | Manufacturing | 1985 |
| Brunel Carpentry Limited | Construction | 2025 |
| Bury Farm (Meppershall) Limited | Agriculture & fishing | 1956 |
| C&N Carpentry Limited | Construction | 2024 |
| Callisto Management Limited | Administrative & support | 2022 |
| Cambridge Raqa Solutions Limited | Administrative & support | 2021 |
| Camelot Inns Limited | Hospitality | 1998 |
| Campton Inns Ltd | Hospitality | 2016 |
| Campton Wealth Management Ltd | Financial services | 2025 |
| Capital Veracity Ltd | Construction | 2014 |
| Capitalise Trading Ltd | Financial services | 2025 |
| Capitalize Investments Ltd | Real estate | 2019 |
| Carousel Services Ltd. | Wholesale & retail | 2005 |
| Catbells Health Limited | Wholesale & retail | 2025 |
| Catbells Properties Limited | Real estate | 2019 |
| Catherine Created Limited | Wholesale & retail | 2020 |
| Cavalcade Products Limited | Manufacturing | 2004 |
| CDR Care Ltd | Health & social care | 2014 |
| Chalinus Ltd | Information & communication | 2014 |
| Chalinus Properties Ltd | Real estate | 2017 |
| Challenge Central Limited | Arts & recreation | 2010 |
| Charles Wilson (Carpets) Limited | Wholesale & retail | 1972 |
| Charles Wilson Holdings Limited | Financial services | 2022 |
| Chic Kending Limited | Financial services | 2010 |
| Chmhomes Limited | Real estate | 2021 |
| Chouffot Limited | Construction | 2014 |
| Christopher John Creative Capture Ltd | Manufacturing | 2023 |
| Circablanca Limited | Manufacturing | 2024 |
| Cjlb Optics Ltd | Professional & scientific | 2025 |
| Claire Bailey Regulatory Consultancy Limited | Professional & scientific | 2013 |
| Cleaning Express (Beds) Limited | Administrative & support | 2011 |
| Clifton Restaurant & Takeaway Ltd | Hospitality | 2024 |
| Clifton Restructuring Ltd | Professional & scientific | 2014 |
| Clubhouse Goods Limited | Wholesale & retail | 2025 |
| Colebourne Transport Limited | Transport & logistics | 2008 |
| Colour ME Free Ltd | Wholesale & retail | 2025 |
| Compasso Ltd | Professional & scientific | 2000 |
| Consolidated Plastics Limited | Manufacturing | 2017 |
| Consumer Protection Group Limited | Financial services | 2018 |
| Contabooks Ltd | Professional & scientific | 2020 |
| Control Box Electronics Limited | Manufacturing | 2023 |
| Cooper & Donnelly Ltd | Manufacturing | 2023 |
| Country Properties (BLC) Limited | Real estate | 2003 |
| Country Properties (Shefford) Limited | Real estate | 2013 |
| Couzens Storage Solutions Limited | Wholesale & retail | 1992 |
| Craft Tiling & Property Management Ltd | Construction | 2026 |
| Cravefields Limited | Professional & scientific | 1987 |
| Crescent Marketing Limited | Information & communication | 2022 |
| Cresthill Accountancy Limited | Professional & scientific | 2000 |
| Crispy Chicken and Pizza Ltd | Hospitality | 2023 |
| Croftoak Limited | Real estate | 2015 |
| Cross Directory Consulting Ltd | Information & communication | 2023 |
| Customriders Hitchin Limited | Wholesale & retail | 2022 |
| D Mcerlean Construction Limited | Construction | 2002 |
| D P Builders Shefford Ltd | Construction | 2021 |
| D&M Doors and Windows Ltd | Manufacturing | 2022 |
| D-Well Engineering Limited | Manufacturing | 2015 |
| Daniel Clinical Services Ltd | Health & social care | 2026 |
| Danny Barker Web Design Limited | Information & communication | 2009 |
| Darlow Tiling Ltd | Construction | 2025 |
| Darwood Management Services Ltd | Construction | 2024 |
| Dawn Until Dusk Ltd | Health & social care | 2013 |
| Day Interiors & Property Maintenance Limited | Construction | 2004 |
| Decor Rating Ltd | Construction | 2023 |
| Deering Aviation Limited | Manufacturing | 2022 |
| Deli DOT Zero Ltd | Manufacturing | 2019 |
| Dempster Construction Services Limited | Construction | 2012 |
| Denman Autocare Limited | Wholesale & retail | 2012 |
| Dentec Services Limited | Manufacturing | 2003 |
| Derek Harris & Sons Limited | Administrative & support | 2022 |
| DGK Construction Limited | Construction | 2003 |
| Diamond Nails Studio Ltd | Other services | 2023 |
| Direct Janitorial Solutions Limited | Wholesale & retail | 2013 |
| Disco Duck Limited | Arts & recreation | 2011 |
| DJG Automotive Ltd | Wholesale & retail | 2024 |
| DO 1 Driver Ltd | Construction | 2023 |
| DOX Supplements UK Ltd | Wholesale & retail | 2022 |
| Dragotech Limited | Information & communication | 2025 |
| Dream Homes Building and Construction Ltd | Construction | 2024 |
| Drift Cards Ltd | Wholesale & retail | 2025 |
| Drive Lines Technologies Limited | Wholesale & retail | 1992 |
| Drivewise Advisory UK Ltd | Professional & scientific | 2026 |
| Drsa Consulting Ltd | Professional & scientific | 2018 |
| DRW Property Ltd | Real estate | 2026 |
| Dualnex Ltd | Information & communication | 2026 |
| Duck Lake Properties Ltd | Hospitality | 2026 |
| EAN Consultants Limited | Information & communication | 2022 |
| East Anglia Asset Management Company Ltd | Financial services | 2025 |
| Eastfield Property Solutions Ltd | Real estate | 2021 |
| EAZ Foods Ltd | Hospitality | 2026 |
| Echidna Mountain Ltd | Wholesale & retail | 2024 |