| CP Human Factors Limited | Health & social care | 2012 |
| CPA Strategy Limited | Administrative & support | 2025 |
| CPATEL7 Ltd | Health & social care | 2014 |
| CPB Property Solutions Ltd | Real estate | 2026 |
| Cpca Limited | Professional & scientific | 2012 |
| Cpdl Limited | Health & social care | 2004 |
| CPK Welding Limited | Extraterritorial | 2012 |
| CPM Construction (NW) Ltd | Financial services | 2024 |
| CPM Construction Project Management Ltd | Construction | 2017 |
| Cpps Music Ltd | Education | 2023 |
| CPS Data Consulting Limited | Information & communication | 2024 |
| CR Digital Strategy Ltd | Information & communication | 2025 |
| CR377 Ltd | Real estate | 2023 |
| CR8 Consultancy Limited | Professional & scientific | 2014 |
| Crack the Shutters Ltd | Professional & scientific | 2021 |
| Craftworld Holdings Limited | Professional & scientific | 2024 |
| Crafty Time OUT Limited | Arts & recreation | 2014 |
| Craftychique Limited | Manufacturing | 2015 |
| Craig Harrison Productions Limited | Arts & recreation | 2025 |
| Cranfield Engineering Limited | Professional & scientific | 2021 |
| Crappo Limited | Real estate | 2001 |
| Crazy in Love Designs Ltd | Professional & scientific | 2019 |
| Crazy Talk Limited | Information & communication | 2014 |
| CRE4TIV Ltd | Professional & scientific | 2023 |
| CRE8IVE Developments Ltd | Households | 2012 |
| Create IT Studio Ltd | Arts & recreation | 2013 |
| CREATE28 Ltd | Professional & scientific | 2025 |
| Creathing Ltd | Transport & logistics | 2025 |
| Creative Idea Associates Ltd | Financial services | 2025 |
| Creative Minds Media (CMM) CIC | Education | 2023 |
| Creative Mole Ltd | Information & communication | 2015 |
| Creative Red Monkey Ltd | Information & communication | 2023 |
| Creative Red Monkey Properties Ltd | Real estate | 2019 |
| Creative Thinkers Ltd | Professional & scientific | 2019 |
| Credit Solve Ltd | Financial services | 2023 |
| Creditproof Limited | Financial services | 1991 |
| Crestfield Estates Ltd | Real estate | 2026 |
| Critical Exposure Films Ltd | Information & communication | 2021 |
| CRN Solutions Ltd | Professional & scientific | 2016 |
| Cronox Ltd | Extraterritorial | 2012 |
| Crop Crown Limited | Wholesale & retail | 2024 |
| Croton Co Ltd | Wholesale & retail | 2025 |
| Crowe Flooring Ltd | Construction | 2004 |
| Crown Street Group Ltd | Construction | 2023 |
| Cryptocash Ltd | Information & communication | 2023 |
| Crystal Hair Beauty & Aesthetic Ltd | Other services | 2020 |
| CS 2025 Ltd | Wholesale & retail | 2015 |
| CSD (Brass Founders) Limited | Real estate | 2017 |
| CSI Investments Ltd | Real estate | 1997 |
| Csimpson Case Management Ltd | Public administration | 2025 |
| Ctid (Manchester) Limited | Other services | 2019 |
| Ctid Investments Limited | Real estate | 2022 |
| Ctlf Limited | Administrative & support | 2016 |
| Ctpharm Ltd | Wholesale & retail | 2022 |
| CU Electrical Ltd | Construction | 2020 |
| Cube Cost Consultants Limited | Professional & scientific | 2013 |
| Cubed PR Limited | Professional & scientific | 2009 |
| CUE Cars Corporate Services Limited | Transport & logistics | 2009 |
| Cullidad Ltd. | Professional & scientific | 2025 |
| Cuppa Beverages (Wigan) Limited | Hospitality | 2025 |
| Curageous Ltd | Professional & scientific | 2024 |
| Cutts and Co Accountants and Tax Advisors Limited | Professional & scientific | 2018 |
| Cutts and Company Limited | Extraterritorial | 2021 |
| Cwmni Y MÔR Ltd | Real estate | 2026 |
| Cyberden Solutions Limited | Extraterritorial | 2010 |
| Cybertack Limited | Extraterritorial | 2025 |
| Cypress House Ltd | Construction | 2018 |
| CZR Property Management Ltd | Real estate | 2020 |
| D & S Shah Investments Limited | Real estate | 2019 |
| D and D Building Construction Contractor Limited | Construction | 2024 |
| D J H Property Services Limited | Administrative & support | 2007 |
| D R Reaney & Sons Limited | Construction | 2006 |
| D S Findings Limited | Administrative & support | 2002 |
| D&B Northern Properties Ltd | Real estate | 2022 |
| D&H Wells Ltd | Real estate | 2020 |
| D&S Capital Investments Limited | Professional & scientific | 2023 |
| D.J Properties MCR Ltd | Real estate | 2022 |
| D.U.G Construction Ltd | Construction | 2025 |
| D1 Cafe & Takeaway Ltd | Hospitality | 2025 |
| DA Healthcare Services Limited | Health & social care | 2012 |
| DA PAD Limited | Real estate | 2025 |
| DA Shop Stockport Ltd | Wholesale & retail | 2025 |
| DAD Co Finance Limited | Information & communication | 2016 |
| Daisy Imprints Ltd | Manufacturing | 2008 |
| Dale Decor Ltd | Construction | 2020 |
| Dalya Ltd | Wholesale & retail | 2023 |
| DAN Hollins Limited | Construction | 2019 |
| Danax Coaching Ltd | Professional & scientific | 2021 |
| Dane Manor Management Company Limited | Extraterritorial | 2012 |
| Danefield Property Management Limited | Real estate | 1977 |
| Danielle Ward Recruitment Ltd | Administrative & support | 2014 |
| Danmarque Holdings Limited | Professional & scientific | 2021 |
| Dantiboo Global Limited | Financial services | 2020 |
| Dantiboo Limited | Wholesale & retail | 2020 |
| Dany Investments Ltd | Real estate | 2024 |
| Dark Rover Limited | Wholesale & retail | 2020 |
| Darr Properties Limited | Real estate | 2024 |
| Dasari's Limited | Health & social care | 2026 |
| Dass Auto Ltd | Wholesale & retail | 2020 |
| Datastream Media Limited | Administrative & support | 2015 |