| Clive Cowern Holdings Limited | Transport & logistics | 2022 |
| Clive Cowern Transport Services Limited | Transport & logistics | 2002 |
| CLN Homes Ltd | Hospitality | 2023 |
| CMM Solutions (UK) Ltd | Manufacturing | 2014 |
| Coach House Management Company (Bridgnorth) Limited | Real estate | 2021 |
| Coastal Cornwall Limited | Extraterritorial | 2011 |
| Cockerham Estate Limited | Hospitality | 2010 |
| Cocktail Club Ltd | Hospitality | 2023 |
| Coldwell & Flavell Ltd | Real estate | 2021 |
| Colin Wells Consulting Limited | Professional & scientific | 2012 |
| Commercial Heating Services (Bridgnorth) Ltd | Manufacturing | 2015 |
| Commercial Heating Services Limited | Manufacturing | 2023 |
| Complete Aviation Services Limited | Administrative & support | 2009 |
| Compressor Sales Service and Repairs Ltd | Manufacturing | 2025 |
| Concept CLO Ltd | Wholesale & retail | 2024 |
| Concord Products Ltd | Manufacturing | 2019 |
| Consumer Duty Alliance C.I.C. | Administrative & support | 2021 |
| Container Innovations Ltd | Manufacturing | 2024 |
| Content Girl Creations Limited | Information & communication | 2024 |
| Contract Ductwork Services Limited | Manufacturing | 1993 |
| CONX2 Technology Ltd | Wholesale & retail | 2012 |
| Cool Taffy Limited | Wholesale & retail | 2022 |
| Coolfast Installations Ltd | Manufacturing | 2025 |
| Coopervale Renovations Limited | Construction | 2026 |
| Corinthian's Care Services Limited | Health & social care | 2025 |
| Cornish Getaways Ltd | Hospitality | 2022 |
| Corporate Tax Planning Limited | Extraterritorial | 1988 |
| Corporate Togs Group Ltd | Wholesale & retail | 2010 |
| Cosy Cottage Antiques Ltd | Wholesale & retail | 2020 |
| COT Mattress Company Limited | Wholesale & retail | 2008 |
| Coton Design & Build Limited | Construction | 2025 |
| Coton Weddings & Events Limited | Hospitality | 2025 |
| Countryside Storage Limited | Administrative & support | 2019 |
| Courier Solutions Group Ltd | Transport & logistics | 2025 |
| Cradac Limited | Other services | 2017 |
| Craig Thomas Online Limited | Information & communication | 2023 |
| Craven Dunnill Group Limited | Financial services | 2011 |
| Craven Dunnill Holdings Limited | Wholesale & retail | 2022 |
| Craven Dunnill Investments Limited | Financial services | 2021 |
| Craven Dunnill Project Ceramics Limited | Wholesale & retail | 2006 |
| CRB Builders (Shropshire) Ltd | Construction | 2014 |
| CRE8 Administration Services Limited | Financial services | 2005 |
| CRE8TORS Limited | Wholesale & retail | 2008 |
| Creative Films Limited | Wholesale & retail | 2003 |
| Creative Solo Solutions Ltd | Professional & scientific | 2018 |
| Credibly Green Limited | Professional & scientific | 2015 |
| Cressett Heritage Limited | Real estate | 2015 |
| Cressett Limited | Other services | 2012 |
| Critecocare Ltd | Professional & scientific | 2025 |
| Crown Property (Midlands) Limited | Real estate | 2021 |
| Crown Storage Solutions Limited | Real estate | 2026 |
| Crown Street Properties Limited | Real estate | 1972 |
| Crown Tiles and Bathrooms Ltd | Wholesale & retail | 2013 |
| Crown Tiles Ltd | Wholesale & retail | 2013 |
| Crowsmill Craft Centre C.I.C. | Education | 2012 |
| Crtbt Ltd | Wholesale & retail | 2025 |
| Crystal Emporium Limited | Wholesale & retail | 2023 |
| CTD Consulting Limited | Professional & scientific | 2020 |
| CTP Wealth Management Limited | Financial services | 2013 |
| Culloden Estates Ltd | Real estate | 2010 |
| CUP Limited | Hospitality | 2021 |
| Curanium Limited | Health & social care | 2014 |
| Curve Wine Ltd | Wholesale & retail | 2023 |
| CW Lloyd Construction Ltd | Construction | 2022 |
| Cwellscake Ltd | Hospitality | 2026 |
| D & E Construction & Windows Ltd | Construction | 2017 |
| D & G Consultants Service Ltd | Information & communication | 2011 |
| D and a Luxury Stays Ltd | Households | 2026 |
| D Cockerham Building Contractors Ltd | Construction | 2025 |
| D J Rutter Properties Ltd | Real estate | 2009 |
| D L Highley Ltd | Extraterritorial | 1949 |
| D W Shotton Landscapes Limited | Construction | 2004 |
| D Z Welch Ceilings & Partitions Ltd | Construction | 2017 |
| Dad's the Word Limited | Health & social care | 2016 |
| Damp Care Midlands Ltd | Construction | 2023 |
| Damson Valley Ltd | Wholesale & retail | 2025 |
| Danagri - 3S Limited | Wholesale & retail | 1983 |
| Danesford Estates Ltd | Real estate | 2019 |
| Darcy Apparel Ltd | Other services | 2024 |
| Davenport Property Management Limited | Real estate | 2002 |
| David Bingham Limited | Information & communication | 2024 |
| David Dexter Motor Vehicle Repairs Limited | Wholesale & retail | 2004 |
| David Higgs Builders Limited | Construction | 2003 |
| David Preston Associates Limited | Professional & scientific | 2012 |
| Day Commerce Ltd | Wholesale & retail | 2021 |
| DC Architectural Design Ltd | Professional & scientific | 2014 |
| DC Architectural Technical Ltd | Professional & scientific | 2020 |
| DCW Electrical Ltd | Construction | 2014 |
| Deja VU 2 Limited | Wholesale & retail | 2011 |
| Derick King (Motors) Limited | Wholesale & retail | 1975 |
| Deselk Ltd | Professional & scientific | 2024 |
| Design by Eleven Ltd | Professional & scientific | 2018 |
| Design Jazz Limited | Arts & recreation | 2006 |
| Diamined Limited | Administrative & support | 2007 |
| Diamond West Properties Ltd | Construction | 2024 |
| Digby Developments Limited | Construction | 2017 |
| Dilraz Ltd | Hospitality | 2026 |
| Direct Service Engineering Ltd | Manufacturing | 2017 |
| Discount Ceramics Midlands Limited | Wholesale & retail | 1991 |
| Distribe Limited | Wholesale & retail | 2020 |