| Better Car Care Ltd | Wholesale & retail | 2026 |
| Bevis Design Associates Limited | Administrative & support | 2004 |
| Bfpr Marketing and Technical Solutions Limited | Professional & scientific | 2014 |
| Big Baboon Limited | Information & communication | 2024 |
| Big Bounce Productions Limited | Information & communication | 2019 |
| Big Little Bird Limited | Information & communication | 2021 |
| Bigabox Production Ltd | Administrative & support | 2013 |
| Biggle Spice Ltd | Hospitality | 2026 |
| Biggles Bengal Limited | Hospitality | 2023 |
| Biggles Restaurant & Takeaway Ltd | Hospitality | 2024 |
| Biggleswade Arts Collective C.I.C. | Arts & recreation | 2021 |
| Biggleswade Barbering Company Ltd | Other services | 2019 |
| Biggleswade Beauty Ltd | Other services | 2019 |
| Biggleswade Flying Group Ltd | Arts & recreation | 2016 |
| Biggleswade Hand Car Wash Ltd | Administrative & support | 2024 |
| Biggleswade Local Limited | Wholesale & retail | 2023 |
| Biggleswade Masonic Centre Limited | Other services | 2008 |
| Biggleswade MOT Centre Ltd | Wholesale & retail | 2011 |
| Biggleswade Pizza Box Ltd | Hospitality | 2024 |
| Biggleswade Properties Ltd | Real estate | 2025 |
| Biggleswade Rentals Limited | Administrative & support | 2026 |
| Biggleswade United Football Club Ltd | Arts & recreation | 2025 |
| BL Property Letting Ltd | Real estate | 2021 |
| Black Box Data Science Limited | Professional & scientific | 2016 |
| Black Cat Painting Ltd | Information & communication | 2022 |
| Black Widow Internet Solutions Limited | Information & communication | 2001 |
| Block a Roseberry Court Residents Company Limited | Households | 1983 |
| Blue Hand Car Wash Limited | Wholesale & retail | 2014 |
| Blue Note Music School Ltd | Education | 2024 |
| Blue Pearl Properties Limited | Households | 2019 |
| Bobbie JAY Events Ltd | Arts & recreation | 2021 |
| Boiler Tech Limited | Construction | 2002 |
| Borderline Landscapes Ltd | Administrative & support | 2022 |
| Borderline Resin Ltd | Administrative & support | 2023 |
| Boston UK Holdings Limited | Financial services | 2022 |
| Bowker Productions Limited | Information & communication | 2015 |
| Boyalar Ltd | Hospitality | 2025 |
| Bracehand Limited | Manufacturing | 1984 |
| Brigham Gardens (Flat Management) Limited | Households | 2002 |
| Broch Consultants Limited | Professional & scientific | 2012 |
| Broco Carpentry Ltd | Manufacturing | 2021 |
| Brooklyn London Limited | Wholesale & retail | 2015 |
| Brooklyn World Limited | Wholesale & retail | 2025 |
| Broom Developments LLP | | 2017 |
| Broom Management Company Limited | Real estate | 1988 |
| Brothers Lifts Ltd | Manufacturing | 2008 |
| Building & Roofing Solutions Ltd | Construction | 2020 |
| Building Technical Services Ltd | Professional & scientific | 2026 |
| Burrow Tail Engineering Limited | Professional & scientific | 2024 |
| Burrow Tail Limited | Real estate | 2024 |
| Bytewise System Services Limited | Energy | 1990 |
| C Division Films Ltd | Information & communication | 2010 |
| C Dudley Electrical Ltd | Construction | 2023 |
| Cabal Minion Cards Ltd | Wholesale & retail | 2021 |
| Caballo Encanto Ltd | Wholesale & retail | 2026 |
| Cabin Beauty (Cambs) Limited | Other services | 2020 |
| Cabin Beauty Ltd | Other services | 2011 |
| Calibre Property Management Limited | Real estate | 1994 |
| Calm Frog Ltd | Arts & recreation | 2021 |
| Cambourne Mechanical Services Ltd | Construction | 2017 |
| Camden House Group Limited | Professional & scientific | 2026 |
| Camtile Limited | Extraterritorial | 1986 |
| Caneo Estates Limited | Real estate | 2001 |
| Capital Point Limited | Construction | 2012 |
| Care Ideals Limited | Professional & scientific | 2014 |
| Carter Consultancy Ltd | Health & social care | 2026 |
| Cascade Properties Limited | Real estate | 1998 |
| Castle Crew Ltd | Information & communication | 2023 |
| Castle Payroll Consulting Limited | Financial services | 2018 |
| Catalyst Post Limited | Information & communication | 2014 |
| Catherine Bohart Ltd | Arts & recreation | 2021 |
| CAV Media Ltd | Professional & scientific | 2025 |
| Caveman Studios Limited | Professional & scientific | 2022 |
| CC Supply Chain Solutions Ltd | Professional & scientific | 2025 |
| CCR Coachworks Ltd. | Wholesale & retail | 2015 |
| Cedarwood Projects Limited | Construction | 2000 |
| Cedrix Limited | Information & communication | 2015 |
| Ceema Holdings Limited | Financial services | 2026 |
| Ceema Recruitment Limited | Administrative & support | 1987 |
| Ceema Technology Limited | Manufacturing | 1979 |
| Celestial Healthcare Limited | Public administration | 2022 |
| Certus Consultants Limited | Administrative & support | 2014 |
| CG Scoring Ltd | Information & communication | 2017 |
| Chai Brunch Limited | Hospitality | 2025 |
| Chalcedony Consulting Ltd | Information & communication | 2026 |
| Chamby Group Ltd | Construction | 2019 |
| Chelmsford Park Farm Developments Ltd | Construction | 2021 |
| Cherished Complexions Ltd | Other services | 2023 |
| Chichi Care Services Ltd | Health & social care | 2025 |
| Chocolinho Ltd | Manufacturing | 2021 |
| Chris Hatt Limited | Administrative & support | 2019 |
| Chris Tompkins & Associates Limited | Professional & scientific | 2014 |
| Chrisdan Building Services Limited | Construction | 2010 |
| Church Street Tandoori Ltd | Hospitality | 2024 |
| Churchill Equity Limited | Construction | 2017 |
| Churchweb Ltd | Information & communication | 2016 |
| Ciaran Bannon Ltd | Information & communication | 2016 |
| Cici’S Cold Brew Ltd | Manufacturing | 2026 |
| Cikhu Limited | Information & communication | 2017 |
| City Point Convenience Store Ltd | Wholesale & retail | 2018 |