| Bourne Gymnastics Club Limited | Arts & recreation | 2014 |
| Bourne Window & Exterior Cleaning Ltd | Administrative & support | 2014 |
| Boutique by Chloe Ltd | Wholesale & retail | 2024 |
| Bowjangles Limited | Wholesale & retail | 2006 |
| Bowman Ballard Limited | Wholesale & retail | 2023 |
| Boxing Clever (London) Ltd | Wholesale & retail | 2015 |
| Boxxinc Limited | Manufacturing | 2020 |
| BP Case Management Ltd | Health & social care | 2026 |
| BPC Construction Ltd | Construction | 2015 |
| Bpfw Ltd | Construction | 2017 |
| BQI FUM Innovation Ltd | Mining & quarrying | 2018 |
| Brace Horizon Ltd | Information & communication | 2024 |
| Brajsittingbourne Limited | Hospitality | 2024 |
| Brambledown Place Management Company Limited | Households | 2010 |
| Brambledown Tyres Ltd | Wholesale & retail | 2025 |
| Bramblefield Lane Limited | Real estate | 2023 |
| Bramley Consulting Services Ltd | Professional & scientific | 2016 |
| Bramwell Consultancy Services Limited | Administrative & support | 2019 |
| Branchett Limited | Administrative & support | 2003 |
| Brayden Constructions Ltd | Construction | 2024 |
| Briave Limited | Health & social care | 2024 |
| Brickvas Construction Ltd | Construction | 2019 |
| Bridge the GAP Sporting Education Ltd | Education | 2025 |
| Bridger’S Law Limited | Professional & scientific | 2018 |
| Bridges Competitions Ltd | Wholesale & retail | 2024 |
| Bridget Skelton Limited | Administrative & support | 2006 |
| Brielle's Events Ltd | Wholesale & retail | 2023 |
| Brigade Models Limited | Arts & recreation | 2001 |
| Bright Collaborations Limited | Health & social care | 2017 |
| Bright Hire Energy Limited | Administrative & support | 2025 |
| Bright Line Childcare Ltd | Health & social care | 2024 |
| Bright Stars Home Nursery Sittingbourne Limited | Health & social care | 2026 |
| Brighthouse Property Management Ltd | Real estate | 2026 |
| Brightspark Payments Limited | Professional & scientific | 2019 |
| Brightwhite Windows & Conservatories Limited | Construction | 2008 |
| Brimm & Sons Properties Ltd | Real estate | 2019 |
| Britannia Lifts Limited | Manufacturing | 2018 |
| Brits Autobits Limited | Wholesale & retail | 2024 |
| BRK Management & Consultancy Ltd | Professional & scientific | 2025 |
| BRN Architectural Ltd | Wholesale & retail | 2026 |
| Broadmead Cast Stone Ltd | Professional & scientific | 1996 |
| Broadoak Controls Limited | Construction | 1990 |
| Brodos Trans Ltd | Transport & logistics | 2019 |
| Brook Heritage Capital Limited | Real estate | 2023 |
| Brook Roofing Solutions Limited | Construction | 2023 |
| Brother Services Ltd | Hospitality | 2025 |
| Broughton Storage & Transport Ltd | Extraterritorial | 2025 |
| Brownings General Builders Limited | Construction | 1992 |
| BSC Security Limited | Administrative & support | 2014 |
| BSC25 Ltd | Wholesale & retail | 2024 |
| BT Aviation Ltd | Professional & scientific | 2025 |
| BTG Recovery Ltd | Real estate | 2019 |
| Bubarista Ltd | Manufacturing | 2023 |
| Bubbling Kids Limited | Education | 2014 |
| Buddy Childcare Ltd | Health & social care | 2022 |
| BUG Bear Marketing Limited | Information & communication | 2018 |
| Builders Matrix Ltd | Construction | 2026 |
| Building and Design Ltd | Construction | 2022 |
| Building Services S and J Limited | Manufacturing | 2025 |
| Buildometric Ltd | Information & communication | 2025 |
| Buildrental Ltd | Administrative & support | 2025 |
| Bukbim 3TS Properties & Investments UK Ltd | Real estate | 2020 |
| Bullit Limited | Information & communication | 2023 |
| Bunatati Romanesti Limited | Wholesale & retail | 2022 |
| Burgess Fiat Specialist Ltd. | Wholesale & retail | 2009 |
| Burgin Associates Ltd | Professional & scientific | 2010 |
| Burr Landscaping Limited | Administrative & support | 2024 |
| Burspoke Ltd | Manufacturing | 2024 |
| Business Units (Castle Road) Management Limited | Real estate | 2008 |
| Buskajus Services Limited | Health & social care | 2015 |
| Buttasideup LLP | | 2017 |
| Buxlow Advisory Ltd | Professional & scientific | 2025 |
| Bvjw Property Ltd | Households | 2025 |
| BW Technical Services Ltd | Construction | 2021 |
| Bwgaming Ltd | Professional & scientific | 2023 |
| Bwlr Services Ltd | Hospitality | 2022 |
| C & C (Kent) Ltd | Wholesale & retail | 2014 |
| C & E Last Ltd | Professional & scientific | 2017 |
| C & G Hire Ltd | Administrative & support | 2025 |
| C & M Property Consultants Limited | Construction | 2025 |
| C Bridgeman HR Services Limited | Administrative & support | 2016 |
| C D Cabling Limited | Construction | 2012 |
| C F Plumbing and Mechanical Limited | Construction | 2025 |
| C J Gibbs & Sons Limited | Construction | 2016 |
| C M Electrical & Property Services Limited | Manufacturing | 2024 |
| C M Properties Kent Ltd | Real estate | 2015 |
| C Management Services Limited | Construction | 2017 |
| C P Elite Interiors Ltd | Construction | 2017 |
| C R Plastering Kent Ltd | Construction | 2023 |
| C Smith Optometry Limited | Health & social care | 2017 |
| C W Harrold Ltd | Construction | 2018 |
| C&C Handywork Ltd | Construction | 2025 |
| C&I Logistics Transport Ltd | Transport & logistics | 2020 |
| C&R Drainage Ltd | Water & waste | 2026 |
| C-Coj Property Ltd | Real estate | 2020 |
| C-Vent Limited | Construction | 2007 |
| C. S. W Electrical & Mechanical Engineering Ltd | Construction | 2019 |
| C. Wherrell Ltd | Professional & scientific | 2010 |
| C3E Solutions Limited | Financial services | 2025 |
| Cabana Rock Limited | Arts & recreation | 2012 |