| Bronzeoak Limited | Professional & scientific | 1981 |
| Brookrise Developments Limited | Real estate | 1996 |
| Brownsia Ltd | Wholesale & retail | 2024 |
| Bryan & Keegan Ltd | Real estate | 2012 |
| BTA Surveying Services. Limited | Construction | 2014 |
| Buba Building Limited | Construction | 2007 |
| Build by Charlie Ltd | Construction | 2023 |
| Build NX Limited | Construction | 2004 |
| Burgess Engineering (SE) Limited | Wholesale & retail | 2002 |
| Burlington Cars and Couriers Limited | Administrative & support | 2003 |
| Bushby Heating Plumbing & GAS Services Limited | Construction | 1996 |
| Business Mergers Limited | Professional & scientific | 2000 |
| Bussi's Foods and Wines Ltd | Wholesale & retail | 2022 |
| C C T Pipefreezing Limited | Construction | 1994 |
| C Steele Associates Limited | Professional & scientific | 2009 |
| C.M. Regan (Property Investment) Limited | Construction | 2001 |
| C4 Boxing Ltd | Administrative & support | 2021 |
| C4P Holdings Limited | Real estate | 2024 |
| CAB Build Co Ltd | Construction | 2025 |
| Cabin Coffee Limited | Wholesale & retail | 2019 |
| Cabot Management Limited | Professional & scientific | 2008 |
| CAD Hards Limited | Professional & scientific | 2017 |
| Cafferky Construction Ltd | Construction | 2026 |
| Calculation Agent Limited | Administrative & support | 2009 |
| Callmepale Ltd | Other services | 2014 |
| Calm Counselling Limited | Other services | 2020 |
| Calmak Ltd | Construction | 2011 |
| Cambridge Tutoring Ltd | Education | 2019 |
| Camcob Limited | Information & communication | 2007 |
| Camden Hill Lettings Ltd | Real estate | 2018 |
| Camden Park East Limited | Real estate | 2011 |
| Cameron Clarke Lawyers Limited | Professional & scientific | 2008 |
| Cameron Cooper Properties Limited | Real estate | 2015 |
| Cameron Family Homes Ltd | Real estate | 2026 |
| Camilla Fone Consulting Ltd | Health & social care | 2022 |
| Canberra Solutions Ltd | Information & communication | 2010 |
| Capital Planning Mortgages Limited | Financial services | 2016 |
| Capital Planning Partners (Holdings 2) Ltd | Financial services | 2026 |
| Capital Planning Partners (Holdings) Ltd | Financial services | 2024 |
| Capital Planning Partners Ltd | Financial services | 2023 |
| Capital Security Systems Ltd | Administrative & support | 2021 |
| Captain Fantastic Kent Ltd | Arts & recreation | 2020 |
| Carbon Structures Ltd | Professional & scientific | 2019 |
| Care First 24 Ltd | Health & social care | 2022 |
| Care IT Consulting Services Ltd | Information & communication | 2015 |
| Care Racing Development Limited | Wholesale & retail | 2022 |
| Carewise Academy Ltd | Education | 2025 |
| Carlton Blyth Limited | Other services | 2024 |
| Carmel Properties Limited | Construction | 1981 |
| Carter & Co Property Improvements Ltd | Construction | 2022 |
| Carvan Limited | Wholesale & retail | 2022 |
| Casa Holidays Ltd | Hospitality | 2022 |
| Catertek Limited | Manufacturing | 1994 |
| Catherine Irving Consultancy Ltd | Health & social care | 2020 |
| Cbuk Group Ltd | Administrative & support | 2017 |
| CC Williams Consultancy Limited | Administrative & support | 2013 |
| CCC Training Limited | Education | 2020 |
| Ccct (Office) Limited | Health & social care | 2015 |
| Cedars Equestrian Services Ltd | Other services | 2023 |
| CEG Tellus Ltd | Real estate | 2020 |
| Central School Supplies Limited | Other services | 2014 |
| Centrenote Limited | Professional & scientific | 2014 |
| Centroplumb Ltd | Construction | 2017 |
| CF Entertainment Kent Ltd | Arts & recreation | 2021 |
| CH Academy Ltd | Education | 2023 |
| Chancery Lane Contracts Ltd | Construction | 2025 |
| Chandlermortgages Ltd | Financial services | 2019 |
| Chandlers Place Management Company Limited | Households | 2011 |
| Chandris Holdings Limited | Financial services | 2016 |
| Chapman Executive Consulting Ltd | Professional & scientific | 2024 |
| Character Appointed Representatives Ltd | Administrative & support | 2025 |
| Character Broker Solutions Ltd | Financial services | 2019 |
| Character Financial Services Limited | Financial services | 1988 |
| Character IB Ltd | Financial services | 2017 |
| Character Investments Ltd | Professional & scientific | 2016 |
| Chartwell Apothecary Limited | Health & social care | 2014 |
| Chef at Hand Ltd | Manufacturing | 2021 |
| Chequers Lodges (Management) Company Limited | Real estate | 2004 |
| Cherish Media Limited | Information & communication | 2025 |
| Cherrytree Properties (Kent) Ltd | Real estate | 2017 |
| Cherrywood Properties Limited | Real estate | 2018 |
| Chislehurst Plumbing & Heating Limited | Construction | 2012 |
| Chitty Brothers Ltd | Construction | 2023 |
| Chodacki Electrical Services Limited | Construction | 2007 |
| Choi PIN Chinese Restaurant Limited | Hospitality | 2026 |
| Choppers World Ltd | Wholesale & retail | 2025 |
| Church Lane Associates Limited | Professional & scientific | 2007 |
| Churchill Business Park Limited | Real estate | 1996 |
| Churchill Court (Westerham) Management Limited | Real estate | 2016 |
| Cineng Consultants Ltd | Professional & scientific | 2022 |
| Circulatr Ltd | Professional & scientific | 2025 |
| City & Meadows Ltd | Administrative & support | 2025 |
| CJA Financial Services Limited | Financial services | 2006 |
| Cjrd Property Limited | Financial services | 2021 |
| CKH Build Limited | Construction | 2014 |
| CKH Dogs Limited | Agriculture & fishing | 2017 |
| Ckkl Services Limited | Information & communication | 2008 |
| CKS Repairs Ltd | Manufacturing | 2024 |
| Clean and Green Spaces Ltd | Administrative & support | 2020 |
| Cleaners Unlimited Ltd | Administrative & support | 2026 |