| Buy Adventure Gear Ltd | Wholesale & retail | 2023 |
| Buyline Ltd | Financial services | 2018 |
| Buyter Ltd | Wholesale & retail | 2025 |
| Buyzone Ltd | Wholesale & retail | 2020 |
| BVF Service Ltd | Transport & logistics | 2020 |
| BW Cafe Group Limited | Hospitality | 2023 |
| BW Freehold Limited | Households | 2025 |
| BX Outdared Limited | Financial services | 2020 |
| BY HI LLP | | 2019 |
| BY Your Side - Living Solutions Ltd | Health & social care | 2026 |
| Byard Electrical & Renewables Ltd | Construction | 2019 |
| Byrne & King Ltd. | Construction | 1995 |
| Byrne & King Plant Hire Limited | Administrative & support | 2012 |
| C & C Resolve Limited | Professional & scientific | 2016 |
| C & D Ventures Ltd | Real estate | 2023 |
| C & G Griffiths Limited | Real estate | 1997 |
| C & J Accountants Limited | Professional & scientific | 2012 |
| C & K Property Ltd | Real estate | 2019 |
| C & N Hearing Limited | Health & social care | 2012 |
| C & P (Meat Sales) Limited | Wholesale & retail | 1984 |
| C & R (SW) Ltd | Administrative & support | 2016 |
| C & R Industrial Services Ltd | Administrative & support | 2023 |
| C & S Network Ltd | Manufacturing | 2022 |
| C & T Properties (Gloucester) Ltd | Real estate | 2022 |
| C & T Residential Ltd | Real estate | 2014 |
| C & W Precision Components Ltd | Manufacturing | 2010 |
| C a Emmerson Ltd | Construction | 2025 |
| C and C Vintage Ltd | Wholesale & retail | 2025 |
| C Bundy Carpentry and Roofing Ltd | Construction | 2018 |
| C J Accounting Solutions Limited | Professional & scientific | 2022 |
| C J W Limited | Real estate | 1984 |
| C M Chicken Limited | Hospitality | 2026 |
| C M Holse Limited | Professional & scientific | 2013 |
| C M Network Limited | Education | 2022 |
| C Mcneil Building Contractors Limited | Construction | 2016 |
| C P Brickwork (FOD) Limited | Construction | 2017 |
| C Property Investments Ltd | Real estate | 2017 |
| C R Infosystems Ltd | Information & communication | 2017 |
| C Tyler Building Limited | Construction | 2004 |
| C Tyler Holdings Limited | Financial services | 2021 |
| C Wood Vehicle Repairs Ltd | Wholesale & retail | 2024 |
| C&C Milano Limited | Administrative & support | 2013 |
| C&J Bullingham Limited | Wholesale & retail | 2013 |
| C&J Property Solutions Ltd | Real estate | 2018 |
| C&J Site Services Limited | Public administration | 2015 |
| C&K Building Ltd | Construction | 2021 |
| C&S Carpentry Ltd | Manufacturing | 2023 |
| C&S Communications Limited | Information & communication | 2023 |
| C&S Express Limited | Transport & logistics | 2018 |
| C&S Security Ltd | Administrative & support | 2019 |
| C-9 Tech Ltd | Information & communication | 2022 |
| C-B Properties (Group) Limited | Real estate | 2024 |
| C-Ling Limited | Professional & scientific | 2017 |
| C. Collingwood Electrical Limited | Construction | 2008 |
| C.B. Hutchins Properties Limited | Real estate | 2009 |
| C.C.R.O.C. Ltd | Other services | 1998 |
| C.F. Stone Ltd | Real estate | 1994 |
| C.I.R.A.S. Limited | Extraterritorial | 1991 |
| C.R.B. Carpentry Ltd | Construction | 2012 |
| C.S. Glass (Cheltenham) Limited | Construction | 1979 |
| C.S. Services Gloucester Ltd | Construction | 2005 |
| C1-C8 Brunel Court Management Co. Limited | Households | 2004 |
| C2I Chapter One CIC | Health & social care | 2021 |
| C3&M Ltd | Education | 2025 |
| C4IS Consulting Ltd | Professional & scientific | 2013 |
| C8L Consortium Ltd | Financial services | 2017 |
| Cadentix Limited | Professional & scientific | 2026 |
| Caelix Ltd | Information & communication | 2025 |
| Cafe AL Mirage Limited | Hospitality | 2019 |
| Cafe Boats Limited | Wholesale & retail | 2022 |
| Caffe Corretto Limited | Hospitality | 2009 |
| Café Rose (Gloucester) Ltd | Hospitality | 2023 |
| CAI Poulton Carpentry Limited | Construction | 2020 |
| CAJ Events (Shenzhen TEV Energy Co) Limited | Hospitality | 2025 |
| Cakee Box Limited | Hospitality | 2022 |
| Calendar Lady Promotions Limited | Professional & scientific | 2006 |
| Caletten Limited | Health & social care | 2022 |
| Califino Limited | Financial services | 2017 |
| Calpix Limited | Information & communication | 2025 |
| Calton Trading Company Ltd | Wholesale & retail | 2026 |
| Calvary Integrated Services Ltd | Administrative & support | 2025 |
| Calvers Limited | Real estate | 1963 |
| CAM Peak Music Festival Limited | Arts & recreation | 2026 |
| Cambium Advisory Limited | Administrative & support | 2020 |
| Camborne Investments Limited | Construction | 1994 |
| Camden Taverns Ltd | Hospitality | 2025 |
| Camera Recycle Ltd | Wholesale & retail | 2022 |
| Camilla Flora Limited | Information & communication | 2022 |
| Camion Associates Limited | Administrative & support | 2001 |
| Camo Gloucs Limited | Other services | 2025 |
| Camp Farm & Stud Ltd | Agriculture & fishing | 2026 |
| Camplepit Court Enterprises Limited | Information & communication | 1999 |
| Camulos Ltd | Information & communication | 2020 |
| CAN YOU SEE ME CIC | Hospitality | 2021 |
| Canalside Limited | Real estate | 2013 |
| Canary Wharf Taverns Ltd | Hospitality | 2023 |
| Candid Paye Limited | Administrative & support | 2025 |
| Canfield Contracting Ltd | Information & communication | 2016 |
| Canopy Estate Agency Ltd | Real estate | 2024 |
| Canopy Estate Agents Ltd | Extraterritorial | 2024 |