| Butt Communication Ltd | Wholesale & retail | 2025 |
| Butterfly BEA Ltd. | Health & social care | 2021 |
| Butterfly Rhooms Limited | Arts & recreation | 2016 |
| Butterworth Steel Processing Limited | Wholesale & retail | 1987 |
| Buy-Rite Bi-Folds Limited | Extraterritorial | 2012 |
| Buymart Ltd | Wholesale & retail | 2014 |
| Buzz &Stay Properties Ltd | Real estate | 2026 |
| BWG Corp Limited | Hospitality | 2020 |
| BY Kathryn Elizabeth Ltd | Professional & scientific | 2020 |
| Bytheway & Co Accountants (Holdings) Limited | Financial services | 2015 |
| Bytheway & Co. Accountants Limited | Professional & scientific | 2008 |
| Bywater News Limited | Wholesale & retail | 2002 |
| C & M Design Limited | Construction | 2007 |
| C H P Services (Midlands) Limited | Manufacturing | 2015 |
| C K Financial Planning Limited | Extraterritorial | 1995 |
| C K Systems Limited | Information & communication | 2004 |
| C K Wealth Management Limited | Extraterritorial | 2008 |
| C M Wheeldon Limited | Construction | 2017 |
| C Mtunzi Ltd | Health & social care | 2018 |
| C R F Sections Limited | Manufacturing | 1991 |
| C W D Contracts Limited | Manufacturing | 2013 |
| C W Electrical Kingswinford Limited | Manufacturing | 2012 |
| C&I Global Ventures Ltd | Wholesale & retail | 2025 |
| C&J Living Ltd | Real estate | 2026 |
| C&S Colsan Ltd | Wholesale & retail | 2026 |
| C&T Private Ltd | Wholesale & retail | 2022 |
| C. a. Dudley Limited | Wholesale & retail | 2015 |
| C. C. Cooper (LYE) Limited | Arts & recreation | 1967 |
| C. Roberts Steel Services Limited | Wholesale & retail | 1995 |
| C.A.F. Limited | Administrative & support | 1998 |
| C.B.S. (Midlands) Limited | Wholesale & retail | 1990 |
| C.H.Products Midlands Limited | Manufacturing | 1989 |
| C.I.G Executive Club Ltd | Professional & scientific | 2025 |
| C.K. Steelfixing Ltd | Construction | 2008 |
| C.L.I Electrics Limited | Construction | 2018 |
| C.W. Grainger & Sons Limited | Real estate | 1954 |
| C7 Decorators Limited | Construction | 2023 |
| Cabal of Enchantment Ltd | Information & communication | 2021 |
| Cabbyconnect Ltd | Administrative & support | 2025 |
| CAD Duct Solutions Ltd | Construction | 2014 |
| Cadrene Supported Living | Health & social care | 2021 |
| Cafe Delish Limited | Hospitality | 2014 |
| Cafe Pars Ltd | Hospitality | 2026 |
| Cairbon Limited | Information & communication | 2019 |
| Cake & Games Ltd | Wholesale & retail | 2021 |
| Calabash Care Ltd | Health & social care | 2016 |
| Calbri Maintenance Services Ltd | Construction | 2015 |
| Calcot Estates Limited | Construction | 2007 |
| Calcourt Holdings Ltd | Financial services | 2018 |
| Caldwell Investment Property Ltd | Real estate | 2025 |
| Caledonia Food & Wine Limited | Wholesale & retail | 2026 |
| Calin B Ltd | Transport & logistics | 2026 |
| Calli Supported Housing Ltd | Health & social care | 2025 |
| Calvine Solutions Ltd | Other services | 2016 |
| CAM Production Inc Ltd | Professional & scientific | 2025 |
| Camexim Transport UK Ltd | Transport & logistics | 2022 |
| CAMPERRENTALS4ME Ltd | Administrative & support | 2025 |
| Campervan Gift Limited | Wholesale & retail | 2015 |
| CAMPERVANS4ME Ltd | Manufacturing | 2022 |
| Canalside Wharf (Weston) Management Company Limited | Households | 2008 |
| Canberra Wells Limited | Wholesale & retail | 1981 |
| Cannock Desserts Limited | Hospitality | 2019 |
| Canterwell Investments Limited | Real estate | 1999 |
| Canvas Your Crown Ltd | Other services | 2025 |
| Caos Global Ltd | Manufacturing | 2025 |
| Capital AIO Solutions Ltd | Transport & logistics | 2026 |
| Caps Connect Ltd | Manufacturing | 2025 |
| Capturing Time Ltd | Professional & scientific | 2024 |
| Car REG U.K. Limited | Manufacturing | 2025 |
| Cardiowave Diagnostic Ltd | Health & social care | 2024 |
| Caregivers Connect Ltd | Health & social care | 2024 |
| Carescope&Intelligence Limited | Health & social care | 2025 |
| Carlisa Holdings & Investments Ltd | Financial services | 2024 |
| Carol Holdings Ltd | Financial services | 2025 |
| Carpenter & Sons (Holdings) Limited | Financial services | 2024 |
| Carpenter Developments Ltd | Construction | 2017 |
| Carpenter Group Ltd | Hospitality | 2026 |
| Carpenter Holdings and Investments Ltd | Real estate | 2016 |
| Carpenter Homes Ltd | Construction | 2016 |
| Carpenter Property Investments Limited | Real estate | 2020 |
| Carpet 2 Go Ltd | Wholesale & retail | 2020 |
| Carpet World (Dudley) Ltd | Wholesale & retail | 2025 |
| Carpet Zone (Telford) Ltd | Wholesale & retail | 2020 |
| Carpets and Flooring Store Limited | Wholesale & retail | 2025 |
| Carpo Holdings & Investments Ltd | Financial services | 2026 |
| Carrs Chilled Foods Limited | Wholesale & retail | 2009 |
| Cartel Communications Limited | Information & communication | 2004 |
| Carters Cravings Limited | Hospitality | 2004 |
| Carvalho Independent Living L Limited | Health & social care | 2022 |
| CAS Professional Services Ltd | Professional & scientific | 2016 |
| Casa Della Pizza Ltd | Hospitality | 2026 |
| Casa MIA (Woodman) Limited | Hospitality | 2003 |
| Casadron Holdings Ltd | Financial services | 2025 |
| Cash Tills Limited | Wholesale & retail | 2014 |
| Caspian Pizza Oldbury Ltd | Hospitality | 2026 |
| Casselden and Sons Ltd | Real estate | 2022 |
| Cassette Photos Ltd | Professional & scientific | 2026 |
| Castle Carbide Limited | Manufacturing | 1990 |
| Castle Cars Dudley Limited | Transport & logistics | 2019 |
| Castle Fire Services Ltd | Public administration | 2021 |