| Cars Anatomy Ltd | Wholesale & retail | 2025 |
| Carsmetics (Bedford) Limited | Manufacturing | 2014 |
| Carsue Limited | Financial services | 2017 |
| Carsupkeep Limited | Wholesale & retail | 2023 |
| Carter Goodson Travel Limited | Administrative & support | 2012 |
| Cartridge Depot Limited | Extraterritorial | 2012 |
| Cartridge Recycling UK Limited | Water & waste | 2019 |
| Carumbar UK Ltd | Hospitality | 2018 |
| Carus for Carers Limited | Administrative & support | 2026 |
| Carva Motor Limited | Wholesale & retail | 2025 |
| Carys Evans Music Ltd | Arts & recreation | 2025 |
| Carz 4 U Ltd | Wholesale & retail | 2024 |
| CAS Decorating Contractors Limited | Construction | 2012 |
| CAS Thermal Ltd | Construction | 2024 |
| Casa Bang Ltd | Real estate | 2020 |
| Casa Bang Trading Ltd | Real estate | 2022 |
| Casa Basilico Ltd | Hospitality | 2026 |
| Casa Bosco Properties Ltd | Real estate | 2022 |
| Casa Cesare Ltd | Hospitality | 2023 |
| Casa Licciardi Ltd | Real estate | 2024 |
| Casa Vostra Limited | Construction | 2007 |
| Cascar 2016 Ltd | Manufacturing | 2016 |
| Cascella Ltd | Professional & scientific | 2024 |
| Cashflow Consulting Ltd | Information & communication | 2023 |
| Casiopea Ltd | Transport & logistics | 2025 |
| Cass Allen Associates Limited | Professional & scientific | 2000 |
| Cass Design Consultants Limited | Professional & scientific | 2018 |
| Cassagne Covell Ltd | Information & communication | 2023 |
| Cast Iron Catering Limited | Hospitality | 2011 |
| Castella Contracting Ltd | Other services | 2018 |
| Castellum 1 Limited | Real estate | 2021 |
| Castellum 2 Limited | Real estate | 2021 |
| Castellum 3 Limited | Real estate | 2021 |
| Castle Car Centre Ltd | Wholesale & retail | 2025 |
| Castle Chiropractic Clinic Limited | Health & social care | 2021 |
| Castle Dental Laboratory Ltd | Health & social care | 2003 |
| Castle Gardens (Beds) Limited | Administrative & support | 2025 |
| Castle Group Pension Trustees Limited | Extraterritorial | 2017 |
| Castle Hill Garage (Bedford) Limited | Real estate | 1957 |
| Castle Keep Estate Management Limited | Households | 1994 |
| Castle Keep Services Limited | Professional & scientific | 2019 |
| Castle Landscapes (Bedford) LLP | | 2023 |
| Castle Mill Consulting Ltd | Professional & scientific | 2025 |
| Castle Pets Bedfordshire Limited | Extraterritorial | 2017 |
| Castle Q Ltd | Professional & scientific | 2024 |
| Castle Quarter Estates Limited | Real estate | 2021 |
| Castle Real Estate Limited | Real estate | 2017 |
| Castle Road Mortgages Ltd | Financial services | 2025 |
| Castlewood Properties & Estates Ltd | Real estate | 2021 |
| Casual Studios Ltd | Wholesale & retail | 2022 |
| Cat Driver Training Ltd | Education | 2003 |
| Cat Property Management Limited | Real estate | 2021 |
| Catalina Court Limited | Households | 1995 |
| Catalpa Investments Limited | Financial services | 2019 |
| Catch 39 Limited | Hospitality | 2004 |
| Catch the Breeze Limited | Administrative & support | 2001 |
| Catesby Investments Ltd | Real estate | 2021 |
| Catherine J Bennett Ltd | Financial services | 2025 |
| Catiamarto Limited | Health & social care | 2021 |
| Catlag Ltd | Professional & scientific | 2025 |
| Catling Auto Repair Services Ltd | Wholesale & retail | 2019 |
| Cato Real Estate Ltd | Professional & scientific | 2020 |
| Cats Eyes IT Solutions Ltd | Information & communication | 2014 |
| Caulder Properties Limited | Real estate | 2021 |
| Cauldwell Court Management Company Limited | Real estate | 1988 |
| Cavalier Communications Limited | Administrative & support | 2017 |
| Cavalieri Holdings Ltd | Real estate | 2020 |
| Cavana Coffee Ltd | Wholesale & retail | 2025 |
| Caveman Conditioning Limited | Arts & recreation | 2017 |
| Cavendish HR Ltd | Professional & scientific | 2012 |
| Cavendish Partnership Group Ltd | Construction | 2023 |
| Caverly Ltd | Health & social care | 2026 |
| Caves Court Management (Potton) Limited | Households | 1982 |
| Caviar Consultancy Ltd | Professional & scientific | 2024 |
| Cawdell Connections Limited | Construction | 2015 |
| Cawne Close Management Company Limited | Households | 2016 |
| CB Entertainments Ltd | Information & communication | 2018 |
| CB Media Limited | Professional & scientific | 2016 |
| Cb's Cleaning Service Ltd | Households | 2019 |
| CBD Maestros Ltd | Wholesale & retail | 2022 |
| Cbdextracts UK Ltd | Wholesale & retail | 2020 |
| Cbgp Properties Limited | Financial services | 2023 |
| Cblb Holdings Ltd | Financial services | 2024 |
| CBN Holdings Limited | Financial services | 2017 |
| CBS Fire and Security Ltd | Administrative & support | 2021 |
| CC Design & Engineering Ltd | Professional & scientific | 2018 |
| CC Project Solutions Ltd | Professional & scientific | 2014 |
| CCF Catering Ltd | Mining & quarrying | 2023 |
| CCL GAS Limited | Construction | 2015 |
| CCL Networks Ltd | Administrative & support | 2024 |
| Ccmfires Limited | Administrative & support | 2016 |
| CD Capital Ltd | Real estate | 2023 |
| CD TRANS95 Ltd | Construction | 2019 |
| Cd&P Services Limited | Construction | 2016 |
| CDI Motorcycles Limited | Wholesale & retail | 2023 |
| CDP Transport and Haulage Ltd | Transport & logistics | 2025 |
| CDS Carpentry and Building Services Limited | Construction | 2016 |
| CDW Coachworks Ltd | Wholesale & retail | 2026 |
| CEA Plumbing and Heating Bedford Limited | Construction | 2025 |
| CEB Construction Limited | Construction | 2017 |