| Blef LLC | | 2023 |
| Bloc & Boon Limited | Manufacturing | 2024 |
| Blue Bird Invest PLC | Extraterritorial | 2010 |
| Blueassist UK Limited | Education | 2013 |
| Bluebells PTY Ltd | Hospitality | 2018 |
| BM Ecom Ltd | Wholesale & retail | 2022 |
| BMS Garage Limited | Wholesale & retail | 2022 |
| Bodell Port Consultancy Limited | Professional & scientific | 2015 |
| Boleyn Formwork and Utility Solutions Ltd | Construction | 2016 |
| Bond Freight UK Ltd | Transport & logistics | 2018 |
| Booked & Paid Ltd | Professional & scientific | 2025 |
| Borderwell Limited | Construction | 1985 |
| Borf Media Limited | Information & communication | 2013 |
| Bossalol Ltd | Wholesale & retail | 2022 |
| Bouverie Frite Invest Ltd | Extraterritorial | 2025 |
| Bowlphish Limited | Extraterritorial | 2014 |
| Bowman Management Limited | Households | 2014 |
| Boxall Intellectual Property Management Ltd | Professional & scientific | 2009 |
| Br-It (Support & Consultancy) Ltd | Information & communication | 2012 |
| Braeside Equestrian Centre Ltd | Arts & recreation | 2014 |
| Braeside Equestrian Ltd | Arts & recreation | 2014 |
| Brain Waves C.I.C. | Health & social care | 2015 |
| Bramlings Limited | Health & social care | 2010 |
| Breached CIC | Professional & scientific | 2024 |
| Bridge News Ltd | Wholesale & retail | 2019 |
| Bright Idea Invest Ltd | Extraterritorial | 2024 |
| Bright Water Filters Ltd | Wholesale & retail | 2025 |
| Brighter Homes (Folkestone) Limited | Construction | 1971 |
| Brisley Associates Limited | Wholesale & retail | 2023 |
| Britannia Coaches Ltd | Transport & logistics | 2009 |
| Britstore Limited | Wholesale & retail | 2011 |
| BRK Evolutions Limited | Real estate | 2005 |
| Bronco Solutions Ltd | Administrative & support | 2025 |
| Brothers Prime Property UK Ltd | Real estate | 2025 |
| Browan Limited | Administrative & support | 2024 |
| Brown Procurement Consultants Limited | Real estate | 2008 |
| Broxpoint (K) Limited | Professional & scientific | 2013 |
| Broxpoint (SV) Limited | Professional & scientific | 2013 |
| Buchanan Optometrists Ltd | Health & social care | 2008 |
| Buckman Housing Limited | Real estate | 2020 |
| Build Consulting Group Ltd | Professional & scientific | 2026 |
| Build Safe Construction Ltd | Construction | 2011 |
| Built Environment Technology Limited | Administrative & support | 2011 |
| Bula Holdings Ltd | Real estate | 2025 |
| Bunch and Lunch Limited | Wholesale & retail | 2023 |
| Burghead Properties Ltd | Construction | 2023 |
| Burley Builds Limited | Construction | 2025 |
| Burnap + Abel (Dover) Ltd | Real estate | 2018 |
| Bury Fish & Chips Ltd | Hospitality | 2019 |
| Bushy Ruff House Freeholder Limited | Households | 2019 |
| Byford Ltd | Construction | 2022 |
| Byod Limited | Information & communication | 2022 |
| Bywater Developments (UK) Limited | Real estate | 2005 |
| Byworth Holdings Limited | Real estate | 2025 |
| BZM Consult Ltd | Professional & scientific | 2024 |
| C & S Swim Coaching Limited | Arts & recreation | 2017 |
| C D Surveys Limited | Professional & scientific | 1992 |
| C Soins Ltd | Extraterritorial | 2020 |
| C Soins Management Ltd | Wholesale & retail | 2020 |
| C Velvick & SON Limited | Construction | 2015 |
| C&M Hayes Limited | Transport & logistics | 2016 |
| C&S Property Acquisitions Limited | Real estate | 2020 |
| C. a Landscape & Groundworks Ltd | Construction | 2019 |
| C.H.B.G Invest Ltd | Extraterritorial | 2023 |
| C.Perkins Joinery Limited | Manufacturing | 2023 |
| C5AM Ltd | Health & social care | 2011 |
| Cabinet Veterinaire Detry Ltd | Extraterritorial | 2018 |
| CAD Tracknav Limited | Information & communication | 2012 |
| Cadair Consulting Limited | Professional & scientific | 2025 |
| Cafe Melange Limited | Hospitality | 2020 |
| Calyx Ltd | Manufacturing | 2018 |
| Camden Crescent Management Limited | Households | 1993 |
| Camomile Rooms (Canterbury) Limited | Other services | 2008 |
| Campbell William Limited | Administrative & support | 2017 |
| Camper and Tang Limited | Real estate | 2018 |
| Campion Environmental Group Limited | Financial services | 2021 |
| Canterbury Recycling Limited | Water & waste | 2010 |
| Canterbury Self Storage Limited | Extraterritorial | 2009 |
| Canterbury Shakespeare Festival Community Interest Company | Education | 2017 |
| Capada Invest Ltd | Extraterritorial | 2024 |
| Capada Ltd | Extraterritorial | 2024 |
| Capify UK LLC | | 2024 |
| Cappagh Capital Limited | Arts & recreation | 2013 |
| Cappagh Rent Ltd | Real estate | 2026 |
| Carbon Free Housing Limited | Administrative & support | 2008 |
| Carbon Free Incubator Limited | Administrative & support | 2008 |
| Care 24X Limited | Health & social care | 2019 |
| Caribalga Group Ltd | Financial services | 2026 |
| Carla Publishing Ltd | Professional & scientific | 2015 |
| Cars, Kinetics and Construction Ltd | Arts & recreation | 2023 |
| Carve OUT Private Equity Limited | Information & communication | 2022 |
| Casa Housing Ltd | Real estate | 2020 |
| Casey Aesthetics and Hygiene Ltd | Health & social care | 2023 |
| Cash Waiting Limited | Wholesale & retail | 2018 |
| Casheuronet UK, LLC | | 2014 |
| Casper Nursery Limited | Health & social care | 2011 |
| Castellum Catering Limited | Hospitality | 2018 |
| Castle Close Residents Association Limited | Extraterritorial | 1995 |
| Castle Street Coffee (Dover) Ltd | Hospitality | 2025 |
| Castle Surveying Consultants Ltd | Professional & scientific | 2015 |