| 1602 Group Limited | Manufacturing | 2002 |
| 2 U Computers Limited | Information & communication | 2000 |
| 2020 Hold Co Ltd | Financial services | 2023 |
| 2P Studio Ltd | Professional & scientific | 2016 |
| 4SITE Consulting Limited | Professional & scientific | 2006 |
| 68 Vincent Square Freehold Limited | Households | 2013 |
| A J Rogers Bricklaying Contractors Ltd | Construction | 2008 |
| A Quality Care Service Limited | Health & social care | 2018 |
| A.N. Russell Limited | Construction | 1999 |
| A.R. Aspinall & Sons Limited | Wholesale & retail | 1974 |
| AAA Real Estate Limited | Real estate | 2025 |
| Action for Innovation Ltd | Professional & scientific | 2012 |
| Adam Keylock Limited | Construction | 2021 |
| Adam Rhys DEE Limited | Information & communication | 2013 |
| Adam Stevenson Ltd | Administrative & support | 2011 |
| Advance Sales & Consulting Limited | Professional & scientific | 2016 |
| Advanced Fuel Systems Limited | Manufacturing | 2004 |
| Affarii Technologies Limited | Information & communication | 2009 |
| AG Sports & Fitness Ltd | Arts & recreation | 2023 |
| Air Conditioning and Ventilation (UK) Ltd | Construction | 2014 |
| Air Technical Services Limited | Construction | 2002 |
| Air Testing Limited | Construction | 2008 |
| AKR Development Limited | Construction | 2024 |
| Akula Partnership Limited | Financial services | 2020 |
| Albatross Offshore Ltd | Professional & scientific | 2017 |
| Alfie Jack Limited | Wholesale & retail | 2011 |
| Alun Design Consultancy Ltd | Administrative & support | 2004 |
| Amanda Banham Ltd | Manufacturing | 2021 |
| Anaber Investments Ltd | Financial services | 2024 |
| Andrew Frostick Associates Limited | Professional & scientific | 2005 |
| Andy's Enterprises Limited | Arts & recreation | 2006 |
| Anthony Cope Limited | Wholesale & retail | 1979 |
| Anthony Johnson Consulting Engineer Limited | Professional & scientific | 2018 |
| Apollo Damp & Timber Decay Specialists Ltd | Construction | 2006 |
| Applied Handling Ltd | Transport & logistics | 2014 |
| Applied Holdings Ltd | Financial services | 2014 |
| Applied Poultry Ltd | Agriculture & fishing | 2024 |
| Aptumen Ltd | Professional & scientific | 2022 |
| Armsby Advisory Limited | Professional & scientific | 2025 |
| ARW Media Ltd | Professional & scientific | 2011 |
| Arwyn J Consultancy Ltd | Education | 2023 |
| Atlas Mart UK Ltd | Wholesale & retail | 2026 |
| August Bridge Ltd | Information & communication | 2021 |
| Aultra Limited | Professional & scientific | 2020 |
| Avianeer Ltd | Professional & scientific | 2025 |
| Avre Partnership Limited | Professional & scientific | 2014 |
| Ayanda UK Ltd | Energy | 2018 |
| Baladene Limited | Administrative & support | 2002 |
| Bean Doctor Limited | Wholesale & retail | 2007 |
| Beaver Seal Limited | Construction | 2015 |
| Bedazzle Arts Limited | Arts & recreation | 2006 |
| BEL Abri Limited | Real estate | 2024 |
| Blink (Bishops Stortford) Ltd | Wholesale & retail | 2018 |
| Blue Ball Inn Grantchester Limited | Hospitality | 2025 |
| Books Express Limited | Wholesale & retail | 2011 |
| Brackenmore Ltd | Agriculture & fishing | 2004 |
| Brad Daws Holdings Limited | Financial services | 2026 |
| Brunel Way (Thetford) Limited | Real estate | 2024 |
| Build Momentum Consulting Ltd | Professional & scientific | 2021 |
| Build Momentum Ltd | Construction | 2015 |
| Built Engineers Limited | Professional & scientific | 2004 |
| Bulana Homes Ltd | Construction | 2019 |
| Burling Communications Limited | Information & communication | 1998 |
| C M S Partnership Limited | Construction | 2003 |
| Caldrees Consulting Limited | Professional & scientific | 2019 |
| Camb Co. NO. 17 Ltd | Professional & scientific | 2011 |
| Cambridge Catering Solutions Ltd | Hospitality | 2023 |
| Cambridge Concours Ltd | Wholesale & retail | 2010 |
| Cambridge Corporate Governance Services Limited | Extraterritorial | 2015 |
| Cambridge Medical Innovation Ltd | Information & communication | 2020 |
| Cambridge Payroll Limited | Professional & scientific | 2014 |
| Cambridge SMC Ltd | Information & communication | 2010 |
| Cambridge Start-Up Mentoring Limited | Professional & scientific | 2025 |
| Cambridge Tuition Ltd | Education | 2018 |
| Cambridge Watch Company Limited | Manufacturing | 2020 |
| Cambs Property Bureau Ltd | Administrative & support | 2005 |
| Camflight Ltd | Education | 2024 |
| Camnord Limited | Professional & scientific | 2025 |
| Camnord Peptide Limited | Professional & scientific | 2025 |
| Camstone Construction Limited | Construction | 2012 |
| Cardfarm Limited | Real estate | 2025 |
| Carlton Place Property Limited | Households | 2007 |
| Carnation Investments UK Ltd | Real estate | 2023 |
| Caroe Architecture Ltd | Professional & scientific | 2009 |
| Carroll Country Pubs Ltd | Hospitality | 2021 |
| Castle Carpentry & Construction Ltd | Construction | 2022 |
| Castle Wealth Limited | Professional & scientific | 2011 |
| Castle Wealth Management Ltd | Extraterritorial | 2019 |
| CB Building Services Ltd | Construction | 2023 |
| CE3 Design Ltd | Administrative & support | 2006 |
| Chad Maxwell Hair Limited | Other services | 2025 |
| Chapel & Swan Ltd | Hospitality | 2000 |
| Cherrywood Joinery (Oxford) Ltd | Manufacturing | 2010 |
| Chris RIX Electrical Ltd | Construction | 2004 |
| Chris Wood Light Ltd | Manufacturing | 2016 |
| Christopher William Land Limited | Construction | 2019 |
| Church Street Works Limited | Construction | 2013 |
| Clearwater Images Limited | Information & communication | 1994 |
| Coco Couture Bridal Ltd | Wholesale & retail | 2025 |
| Code Development Planners Ltd | Professional & scientific | 2012 |