| Bsps Area 3A Limited | Arts & recreation | 2007 |
| Bsps Area 3B Limited | Arts & recreation | 2007 |
| Bsps Area 4A Limited | Arts & recreation | 2007 |
| Bsps Area 4B Limited | Arts & recreation | 2007 |
| Bsps Area 5 Limited | Arts & recreation | 2007 |
| Bsps Area 6 Limited | Arts & recreation | 2007 |
| Bsps Area 7 Limited | Arts & recreation | 2007 |
| Bsps Area 9A Limited | Arts & recreation | 2007 |
| Bsps Area 9B Limited | Arts & recreation | 2007 |
| Bsps Championship Show Company Limited | Arts & recreation | 2006 |
| Bubble Bar Limited | Hospitality | 2016 |
| Buben Investments Group Holdings Ltd | Financial services | 2019 |
| Buben Investments Ltd | Real estate | 2019 |
| Buchanan Family Investment Company Limited | Financial services | 2025 |
| Buckley's Pet Boarding Ltd | Other services | 2019 |
| Budd Limited | Information & communication | 1990 |
| Budget Bespoke Outdoor Living Limited | Construction | 2021 |
| Buds Fitness Limited | Arts & recreation | 2022 |
| Buffalo Grips Limited | Information & communication | 2019 |
| Buffaload Logistics Limited | Wholesale & retail | 2005 |
| Buildingbox Limited | Manufacturing | 2005 |
| Built Property Solutions Limited | Construction | 2021 |
| Bulb Product Development (Sports) Limited | Professional & scientific | 2001 |
| Bulbeck Mill Cottage Limited | Administrative & support | 2017 |
| Bulldog Products Limited | Wholesale & retail | 1996 |
| Bureau of Analysed Samples Limited | Manufacturing | 1935 |
| Burger Bar Huntingdon Ltd | Hospitality | 2021 |
| Burningtree Geospatial Limited | Administrative & support | 2016 |
| Butler Smith Specialist Carriers Limited | Transport & logistics | 2011 |
| Buzz Tech Enterprises Ltd | Information & communication | 2024 |
| BW Cambs Ltd | Construction | 2022 |
| BXB Facilities & Maintenance Ltd | Administrative & support | 2025 |
| BY Georgia Beauty Studio Ltd | Other services | 2026 |
| BY Karol Ltd | Wholesale & retail | 2024 |
| BYC Logistics Ltd | Transport & logistics | 2026 |
| BYC Transport Ltd | Transport & logistics | 2018 |
| Byron & Bailey Ltd | Real estate | 2025 |
| C & G R Lettings Ltd | Real estate | 2021 |
| C & G R Properties Limited | Construction | 2014 |
| C & K Hospitality Ltd | Hospitality | 2023 |
| C a Agriculture Ltd | Agriculture & fishing | 2008 |
| C a Lime Ltd | Agriculture & fishing | 2013 |
| C a W Publishing Ltd | Information & communication | 1996 |
| C J Day Consulting Ltd | Information & communication | 2016 |
| C L S Software Limited | Professional & scientific | 1998 |
| C M C E Ltd | Health & social care | 2024 |
| C Manchester Limited | Agriculture & fishing | 1964 |
| C.C. Webb & Co. Limited | Administrative & support | 1973 |
| C.I.D. Heat Services Limited | Construction | 2000 |
| C.L. Enterprises Limited | Real estate | 1969 |
| C.W. Sworder & Sons Limited | Wholesale & retail | 1947 |
| C5 Property Ltd | Real estate | 2019 |
| CA & WJ Supplies Limited | Agriculture & fishing | 2016 |
| CAB TEN Limited | Transport & logistics | 2023 |
| Caballero Healthcare Ltd | Health & social care | 2026 |
| Cabiri Technologies Limited | Information & communication | 2002 |
| Cadair Idris Limited | Extraterritorial | 2009 |
| Caffmor 2023 Limited | Real estate | 2023 |
| Caffmor Group Limited | Real estate | 2024 |
| Caffmor Limited | Real estate | 2017 |
| Cain Books Limited | Manufacturing | 2026 |
| Caldecote Manor Farms Limited | Professional & scientific | 2008 |
| Calm and Build Ltd. | Construction | 2025 |
| Calm and Considered Accounting Limited | Professional & scientific | 2021 |
| Calm and Develop Ltd. | Construction | 2025 |
| Calm and Partner Ltd. | Construction | 2025 |
| Cambridge 2CV Limited | Wholesale & retail | 2015 |
| Cambridge 4 LLP | | 2019 |
| Cambridge Aesthetics Lounge and Wellbeing Ltd | Other services | 2023 |
| Cambridge Aviation Consultancy Ltd | Transport & logistics | 2014 |
| Cambridge Bidco Limited | Financial services | 2018 |
| Cambridge Blue Square Management Ltd. | Professional & scientific | 2011 |
| Cambridge BUS & Coach Ltd | Transport & logistics | 2015 |
| Cambridge Camper Hire Limited | Administrative & support | 2020 |
| Cambridge Campervan Holdings Limited | Financial services | 2022 |
| Cambridge Campervans Ltd | Wholesale & retail | 2016 |
| Cambridge Carp Ltd | Wholesale & retail | 2020 |
| Cambridge Computers Limited | Other services | 2010 |
| Cambridge Cosmedics Ltd | Health & social care | 2017 |
| Cambridge Cranes Ltd | Construction | 1986 |
| Cambridge Development Design & Management Ltd | Professional & scientific | 2021 |
| Cambridge Dynamics Manufacturing Ltd | Manufacturing | 2021 |
| Cambridge Dynamics Precision Presses Ltd | Construction | 2021 |
| Cambridge Fabrication Limited | Extraterritorial | 2021 |
| Cambridge Fire Doors Ltd | Extraterritorial | 2024 |
| Cambridge Freight Haulage Limited | Information & communication | 1990 |
| Cambridge Geoconsultants Ltd | Professional & scientific | 2015 |
| Cambridge Junior Chamber Limited | Other services | 1999 |
| Cambridge Laser Welding Services Limited | Manufacturing | 2015 |
| Cambridge Marble Co. Ltd | Wholesale & retail | 2025 |
| Cambridge Meridian Educational Trust | Education | 2008 |
| Cambridge Midco 1 Limited | Financial services | 2018 |
| Cambridge Midco 2 Limited | Financial services | 2018 |
| Cambridge Network Engineering Ltd | Other services | 2020 |
| Cambridge Networks Ltd. | Information & communication | 1998 |
| Cambridge One Limited | Professional & scientific | 2008 |
| Cambridge Performance Composites Global Ltd | Manufacturing | 2023 |
| Cambridge Performance Composites Ltd | Manufacturing | 2011 |
| Cambridge Sensors Ltd | Manufacturing | 1991 |
| Cambridge Surgical Partners Ltd | Health & social care | 2025 |