| Brankfleet Advisors Ltd | Financial services | 2018 |
| Breathe Nature Ltd | Wholesale & retail | 2025 |
| Brompton Risk Ltd | Administrative & support | 2026 |
| Brown and Partners Consulting Ltd | Information & communication | 2023 |
| BSP Plumbing and Heating Services Ltd | Construction | 2021 |
| BSP Property Lettings Ltd | Real estate | 2024 |
| Bubbles Window Cleaning Ltd | Administrative & support | 2020 |
| Building Mediation Services Ltd | Real estate | 2018 |
| Building&Structure Ltd | Construction | 2025 |
| Bulinska Dermatology Medical Services Limited | Health & social care | 2015 |
| Burnham Week Limited | Administrative & support | 2017 |
| Burnham Wharf Heritage C.I.C. | Construction | 2022 |
| Burnham-On-Crouch Golf Club Limited | Arts & recreation | 1966 |
| Bvnkaii Limited | Wholesale & retail | 2017 |
| C&B Reporting Solutions Limited | Health & social care | 2016 |
| C.K. Fast Food Limited | Administrative & support | 2019 |
| C.W. Wastnage (Holdings) Limited | Professional & scientific | 1987 |
| Cafe Sixteen Ltd | Hospitality | 2025 |
| CD Productions Ltd | Professional & scientific | 2026 |
| Celeste Tours Ltd | Administrative & support | 2025 |
| Champion's Mortgage Solutions Limited | Financial services | 2018 |
| Chapman Property Developments Ltd | Real estate | 2023 |
| Charles George Automotive Ltd | Wholesale & retail | 2025 |
| Chiltern Glasgow Developments Limited | Professional & scientific | 2003 |
| Chiltern Management Group Limited | Professional & scientific | 2020 |
| Chiltern Management Limited | Professional & scientific | 2002 |
| Chiltern Partners LLP | | 2016 |
| Chimney Cake Paradise Ltd | Manufacturing | 2016 |
| Chris & Boys Services Ltd | Construction | 2025 |
| Christopher Kelly Consultancy Ltd | Professional & scientific | 2020 |
| Churchgate Brasserie Ltd | Hospitality | 2022 |
| Churchgate Fisheries Limited | Arts & recreation | 2020 |
| Cincinnato Tranport Limited | Administrative & support | 2017 |
| Circle of Two Limited | Information & communication | 2006 |
| CK F Food Ltd | Wholesale & retail | 2024 |
| Claremont Brookes Ltd | Professional & scientific | 2025 |
| Cleandra Ltd | Administrative & support | 2022 |
| Clearsky Window Services Ltd | Construction | 2024 |
| Close to Home Child Care Limited | Other services | 2008 |
| Cocoro Group Ltd | Other services | 2015 |
| Compliance Digital Ltd | Information & communication | 2026 |
| Conceptia Limited | Administrative & support | 2003 |
| CONSTRUCTION4YOU Ltd | Construction | 2025 |
| Cordiamixa Ltd. | Information & communication | 2017 |
| Cotter Mortgages Ltd | Financial services | 2022 |
| Cotter Property Management Ltd | Real estate | 2018 |
| Crafty Soso Ltd | Extraterritorial | 2021 |
| Creeksea Caravan Park Limited | Hospitality | 2016 |
| Creeksea Place Events Ltd | Hospitality | 2004 |
| Crescent Moon World Project Ltd. | Wholesale & retail | 2014 |
| Cresney Limited | Professional & scientific | 2003 |
| Critical Care Consult Limited | Health & social care | 2008 |
| Crouch Builders and Brickwork Contractors Ltd | Construction | 2016 |
| Crouch Services Ltd | Other services | 2016 |
| Crows Nest Limited(The) | Households | 1983 |
| Csaba's Painting & Decorating Service Ltd | Construction | 2019 |
| Cssw Building Consultants Ltd | Construction | 2026 |
| Cummings Hall Farm Limited | Agriculture & fishing | 1956 |
| Curry Cottage (Burnham) Ltd | Hospitality | 2020 |
| Cveta Driver Ltd | Transport & logistics | 2020 |
| CVS Auto Ltd | Wholesale & retail | 2025 |
| D T Contracting Limited | Construction | 2010 |
| D4UK Ltd | Professional & scientific | 2020 |
| DAB Testing Services Ltd | Extraterritorial | 2015 |
| Darabont's Transport Services Ltd | Transport & logistics | 2018 |
| David Harris Services Limited | Real estate | 1982 |
| David's Gardening Services & Maintenance Ltd | Administrative & support | 2023 |
| Davis Solicitors (Member) Limited | Professional & scientific | 2009 |
| Davis Solicitors LLP | | 2009 |
| DDR Consultancy Ltd | Professional & scientific | 2024 |
| Debquest Developments Limited | Construction | 2016 |
| Dengie Hearing Services Ltd | Wholesale & retail | 2025 |
| Design&Soul Ltd | Professional & scientific | 2022 |
| Detail Universe Ltd | Wholesale & retail | 2024 |
| Dewpt Ltd | Administrative & support | 2020 |
| Dhanshiri (GB) Ltd | Hospitality | 2014 |
| DHM Horizon Ltd | Wholesale & retail | 2024 |
| DHM Property Developers Ltd | Real estate | 2021 |
| Diamond Swimming Pools Limited | Construction | 2016 |
| Dickens & Goulding Limited | Construction | 1982 |
| Dieselheads Ltd | Wholesale & retail | 2023 |
| Digexis Ltd | Information & communication | 2025 |
| Dirt Away Ltd | Administrative & support | 2020 |
| DIY Home Deco Ltd | Wholesale & retail | 2025 |
| DLB Consultants Ltd | Professional & scientific | 2021 |
| Dmrltf Ltd | Transport & logistics | 2019 |
| DO What Work HQ Ltd | Administrative & support | 2022 |
| Doctor Holistic Limited | Health & social care | 2024 |
| Dracula Trans Ltd | Transport & logistics | 2020 |
| Dream Future Ltd | Construction | 2025 |
| Driveforce BG Ltd | Administrative & support | 2026 |
| Drop Cleaning Services Ltd | Administrative & support | 2021 |
| DRS Rigging Ltd | Manufacturing | 2004 |
| Drvn Wheels Ltd | Wholesale & retail | 2025 |
| DSA Properties Ltd | Construction | 2019 |
| Dtvc Limited | Real estate | 2026 |
| DV Transport Ltd | Transport & logistics | 2019 |
| Dynamic Supplies Ltd | Wholesale & retail | 2013 |
| E J Leisure Entertainment Limited | Hospitality | 2020 |
| E Johson Limited | Wholesale & retail | 2025 |