| Concept Resources Limited | Real estate | 1995 |
| Concept Technical Resources Limited | Administrative & support | 1999 |
| Confia Business Support C.I.C. | Professional & scientific | 2026 |
| Connect ME Car Finance Ltd | Wholesale & retail | 2022 |
| Connect Property Acquisitions Ltd | Construction | 2023 |
| Connect Property Solutions Ltd | Real estate | 2019 |
| Connectique International Limited | Wholesale & retail | 2020 |
| Connorcarleigh Limited | Arts & recreation | 2025 |
| Conor Washington Elite Attacking Coaching Limited | Arts & recreation | 2024 |
| Cool Clean Ltd | Administrative & support | 2025 |
| Cooper & Jackson (Holdings) Limited | Financial services | 2024 |
| Cooper & Jackson EOT Limited | Professional & scientific | 2024 |
| Cooper & Jackson Holdco Limited | Financial services | 2024 |
| Coopmore Properties Limited | Real estate | 2021 |
| Core Group Holdings (Midlands) Ltd | Construction | 2016 |
| Cornforth Homes Limited | Real estate | 2017 |
| Corrina G Consultancy Limited | Professional & scientific | 2025 |
| Cortis Construction Ltd | Construction | 2020 |
| Cosmin Clean Ltd | Administrative & support | 2025 |
| Cotmor Holdings Limited | Financial services | 2011 |
| Cotmor Tool & Presswork Co. Limited | Administrative & support | 1953 |
| Cotswold Bespoke Ltd | Construction | 2024 |
| Cotterill Holdings Limited | Financial services | 2021 |
| Cotton Mill Investments Limited | Real estate | 2015 |
| Counterplas Investments Limited | Financial services | 2021 |
| County Charm Windows and Conservatories Limited | Construction | 2010 |
| County Ground Care Ltd | Other services | 2011 |
| Cozy N Safe Limited | Wholesale & retail | 2020 |
| CPA Capital Investment Ltd | Financial services | 2026 |
| Cplas Mouldings Limited | Manufacturing | 2018 |
| Cradley Care Services Ltd | Public administration | 2020 |
| Crannage Properties Ltd | Real estate | 2024 |
| Create Build Ltd | Construction | 2018 |
| Creative Beauty BHM Ltd | Other services | 2024 |
| Creaton Will Storage Limited | Professional & scientific | 2001 |
| Creilvul Ltd | Wholesale & retail | 2018 |
| Crista Care Limited | Health & social care | 2019 |
| Crocodile Leap Investments Limited | Real estate | 2021 |
| Croft Marketing Limited | Wholesale & retail | 1987 |
| Crossmoore AI Limited | Information & communication | 2024 |
| Crowd-Id Limited | Manufacturing | 2013 |
| Crown Taxi's 24 Ltd | Transport & logistics | 2017 |
| Crumpton Properties Limited | Real estate | 2020 |
| Cryptonomy Ltd | Information & communication | 2025 |
| Crystaldeck Ltd | Wholesale & retail | 2018 |
| CS Building & Plastering Services Ltd | Construction | 2022 |
| CSC Brierley Hill Limited | Construction | 2026 |
| CSK Autos Limited | Wholesale & retail | 1998 |
| CSP Enterprises Limited | Information & communication | 2026 |
| Csvc Ltd. | Professional & scientific | 2016 |
| CSW Grounds Maintenance Ltd | Administrative & support | 2024 |
| Ctee Properties Limited | Real estate | 2025 |
| CTM Drainage Solutions Limited | Construction | 2025 |
| Cutie Cakes Ltd | Wholesale & retail | 2024 |
| CVL Group Limited | Extraterritorial | 2025 |
| Cycloration Ltd | Wholesale & retail | 2018 |
| Cyrille Regis Legacy Trust | Education | 2018 |
| Cyrious Consultancy Ltd | Construction | 2025 |
| Cyrious Group Ltd | Professional & scientific | 2025 |
| Cyrious Property Management Ltd | Hospitality | 2025 |
| D & C Property Solutions Ltd | Construction | 2014 |
| D & D Maintenance Limited | Construction | 1990 |
| D & G Auto Repairs Ltd | Wholesale & retail | 2012 |
| D & G Churchill Ltd | Professional & scientific | 2025 |
| D Atkins Property Limited | Real estate | 2022 |
| D B Utilities Installation Ltd | Construction | 2025 |
| D Guest & Sons Property Developments Limited | Construction | 2013 |
| D J Commercial Solutions Ltd | Professional & scientific | 2025 |
| D J T Deliveries Limited | Transport & logistics | 2020 |
| D S Bassi Builders Ltd | Construction | 2022 |
| D S Hill Limited | Information & communication | 2024 |
| D&O&K Ltd | Transport & logistics | 2018 |
| D&R Upholstery Limited | Manufacturing | 2025 |
| D&S Bridge Holdings Ltd | Financial services | 2017 |
| D&S Bridge Ltd | Construction | 2023 |
| D&S Hand Carwash Ltd | Other services | 2026 |
| D.A Plumbing Solutions Ltd | Construction | 2023 |
| D.C.S. Door Control Systems Limited | Extraterritorial | 1994 |
| D.J.B. Properties (Midlands) Limited | Manufacturing | 1999 |
| D.Moore Property Investment Ltd | Real estate | 2024 |
| DA Convenience Ltd | Wholesale & retail | 2019 |
| DAA21 Properties Limited | Real estate | 2025 |
| Daanish & Co Limited | Other services | 2025 |
| DAB Works Limited | Construction | 2026 |
| Dahen Ltd Ltd | Hospitality | 2023 |
| DAI (Leisure Pursuits) West Midlands Limited | Wholesale & retail | 1991 |
| Daisy Crafts Limited | Wholesale & retail | 2013 |
| Dalal Properties Limited | Real estate | 2017 |
| Dale Capital Investments Limited | Construction | 2020 |
| Dales Kitchens (Wolv) Ltd | Construction | 2007 |
| Dalziel Family Holdings Limited | Professional & scientific | 2002 |
| Dalziel Holdings Limited | Extraterritorial | 2008 |
| Dalziel IFA Limited | Extraterritorial | 2024 |
| Dalziel Independent Financial Advisors Limited | Extraterritorial | 2024 |
| Damage Repair Solutions Ltd | Construction | 2025 |
| DAN Dawson Media Limited | Information & communication | 2023 |
| Danial Russell Ltd | Construction | 2025 |
| Danks Properties Limited | Real estate | 2006 |
| Dany Matei Limited | Transport & logistics | 2022 |
| Danyaal Sports & Entertainment Ltd | Education | 2025 |