| Boss Upholstery Limited | Wholesale & retail | 2016 |
| Bottle & CAN Limited | Hospitality | 2020 |
| Bradley Roberts Ltd | Real estate | 2020 |
| Braveheart Solutions Ltd | Education | 2011 |
| Breedon Construction Services Limited | Construction | 2025 |
| Brew DEN Ltd | Manufacturing | 2023 |
| Bridge Holdings (Midlands) Ltd | Financial services | 2025 |
| Bridge Properties (Midlands) Ltd | Real estate | 2025 |
| Bridge Street Vehicle Engineers Ltd | Real estate | 2019 |
| Bridge Studio Ltd | Administrative & support | 2023 |
| Briggs Amasco Limited | Construction | 1998 |
| Bright Care Services Ltd | Health & social care | 2025 |
| Bright Health Screening Limited | Health & social care | 2018 |
| Bright Oak Brewery Ltd | Manufacturing | 2024 |
| Brighton-Best International, (UK) Limited | Wholesale & retail | 2006 |
| Britannia Bakeries Limited | Wholesale & retail | 2003 |
| Bromsgrove Access Solutions Limited | Manufacturing | 2016 |
| Bromsgrove Steel Limited | Manufacturing | 2011 |
| Brooks Engineering Group Limited | Financial services | 2016 |
| Brown Jewellery Limited | Manufacturing | 2025 |
| BT Event Catering Ltd | Hospitality | 2024 |
| Build Fast Developments Limited | Construction | 2023 |
| Build Fast Ltd | Real estate | 2020 |
| Burns Bros.(Smethwick)Limited | Manufacturing | 1952 |
| Burson Land Ltd | Construction | 2004 |
| Burton Group GAS Ltd | Construction | 2025 |
| C & P Patterns Limited | Administrative & support | 2004 |
| C & S Hudson Ltd. | Hospitality | 2015 |
| C 1 2 SEE Limited | Wholesale & retail | 2008 |
| C Moore Consulting Limited | Professional & scientific | 2022 |
| C P Green Limited | Construction | 2023 |
| C R J Food Safety Ltd | Professional & scientific | 2024 |
| C&C Upholstery Ltd | Manufacturing | 2026 |
| C.A.W Contracts Ltd | Construction | 2021 |
| C.D. Coleman & Sons Limited | Construction | 2015 |
| C.Deelivery Technology Recruitment Solutions Ltd | Administrative & support | 2025 |
| C.S.P. Holdings Limited | Professional & scientific | 2002 |
| CAB Developments U.K. Ltd | Administrative & support | 2022 |
| CAB Group Limited | Administrative & support | 2021 |
| Cafe + Limited | Hospitality | 2018 |
| Caffeine & Combustion Ltd | Wholesale & retail | 2025 |
| Calcon Fencing & Landscapes Limited | Construction | 2023 |
| Calcon Fencing Limited | Construction | 2008 |
| Calcon Fencing Midlands Limited | Construction | 2014 |
| CAM Post Solutions Limited | Information & communication | 2026 |
| Cambridge Television Limited | Financial services | 2013 |
| Car H Expert Ltd | Wholesale & retail | 2022 |
| CARE24 Support Limited | Administrative & support | 2022 |
| Careforce Solutions Ltd | Administrative & support | 2025 |
| Carli Cleaning Solutions Ltd | Administrative & support | 2023 |
| Carrington Cross Limited | Construction | 2012 |
| Carry on Tyre's Limited | Wholesale & retail | 2015 |
| Casmar Design Engineering Limited | Professional & scientific | 2017 |
| Castle Lifting Gear Limited | Professional & scientific | 1985 |
| CDT European Ltd | Transport & logistics | 2025 |
| Central Extrusions (Holdings) Limited | Financial services | 2013 |
| Central Extrusions Limited | Manufacturing | 1998 |
| Central Steel Pickling Limited | Administrative & support | 1983 |
| Centre Point Convenience Store (UK) Limited | Wholesale & retail | 2007 |
| CET Catering Limited | Hospitality | 2026 |
| CGP Consultants Limited | Professional & scientific | 2025 |
| CGP Energy Consultants Limited | Professional & scientific | 2018 |
| Changing Community Stories CIC | Arts & recreation | 2025 |
| Chapel Management Solutions Ltd | Professional & scientific | 2019 |
| Chartwells Logistics Limited | Transport & logistics | 2025 |
| Chef's Lounge Ltd | Hospitality | 2023 |
| Chelash Limited | Other services | 2019 |
| Chertes - Transport Limited | Transport & logistics | 2017 |
| Chipsaway (Kidderminster) Ltd | Wholesale & retail | 2025 |
| Ciao Bella Lingerie (UK) Ltd | Information & communication | 1998 |
| Cielo Bidco Limited | Financial services | 2025 |
| Cielo Holdco Limited | Financial services | 2025 |
| Cielo Midco 1 Limited | Financial services | 2025 |
| Cielo Midco 2 Limited | Financial services | 2025 |
| Cielo Topco Limited | Financial services | 2025 |
| Civic Realty Ltd | Real estate | 2026 |
| Civpoint Ltd | Professional & scientific | 2022 |
| CKW Sales Limited | Wholesale & retail | 2017 |
| Claremont Court Management November 1990 Limited | Real estate | 1990 |
| Clarity Word Limited | Information & communication | 2011 |
| Classic Cocktail Co Ltd | Hospitality | 2024 |
| Classiccamber Limited | Wholesale & retail | 2020 |
| Cleair Aquatics Limited | Wholesale & retail | 2005 |
| Clean ITT Domestics Limited | Administrative & support | 2025 |
| Clear Heating Ltd | Construction | 2025 |
| Clinicpharma Limited | Wholesale & retail | 2005 |
| Clothing Alterations Limited | Wholesale & retail | 2008 |
| Cloud 9 Coffee Shop Ltd | Hospitality | 2024 |
| Clydesdale Holdings Ltd | Financial services | 2023 |
| Clydesdale Property Holdings Ltd | Professional & scientific | 2024 |
| CM Packing Services Ltd | Administrative & support | 2024 |
| CMJ Roofing Limited | Construction | 2015 |
| CMT Engineering Limited | Manufacturing | 2015 |
| CMT Foods Limited | Wholesale & retail | 2024 |
| CMT Properties Limited | Real estate | 2020 |
| Cncdance Ltd | Education | 2023 |
| Coatbridge Associates Ltd | Professional & scientific | 2024 |
| Code Twenty Nine Limited | Professional & scientific | 2016 |
| Cody Roberts Catering Limited | Hospitality | 2024 |
| Coldwinterz Limited | Hospitality | 2023 |